- VL-Voltage before Boosting
- VL-Voltage before Boosting for Rear Motor
- VH-Voltage after Boosting
- Hybrid/EV Battery Voltage
- Boost Ratio
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000026PVD |
| Model Year Start: 2023 | Model: Corolla HV | Prod Date Range: [09/2022 - ] |
| Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): P0AA649,...,P1C8049; Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure; 2023 - 2025 MY Corolla HV [09/2022 - ] | ||
|
DTC |
P0AA649 |
Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure |
|
DTC |
P1C7C49 |
Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure |
|
DTC |
P1C7D49 |
Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure |
|
DTC |
P1C7E49 |
Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure |
|
DTC |
P1C7F49 |
Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure |
|
DTC |
P1C8049 |
Hybrid/EV Battery Voltage System Isolation (Rear Motor Area) Internal Electronic Failure |
DESCRIPTION
The hybrid vehicle control ECU monitors the battery ECU assembly and detects insulation malfunctions in the high-voltage system.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Warning Indicate |
Note |
|---|---|---|---|---|---|---|
|
P0AA649 |
Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure |
Insulation resistance between the high-voltage circuit and the body has decreased.*2 (1 trip detection logic) |
|
Does not come on |
Master Warning: Comes on |
SAE Code: P0AA6 |
|
P1C7C49 |
Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure |
Insulation resistance of the compressor with motor assembly or air conditioning inverter has decreased.*3 (1 trip detection logic) |
Air conditioning system |
Does not come on |
Master Warning: Comes on |
SAE Code: P0AA6 |
|
P1C7D49 |
Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure |
Insulation resistance of the HV battery, battery ECU assembly or SMR has decreased.*3 (1 trip detection logic) |
|
Does not come on |
Master Warning: Comes on |
SAE Code: P0AA6 |
|
P1C7E49 |
Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure |
Insulation resistance of the hybrid vehicle transaxle assembly or inverter for the generator (MG1) and motor (MG2) has decreased.*3 (1 trip detection logic) |
|
Does not come on |
Master Warning: Comes on |
SAE Code: P0AA6 |
|
P1C7F49 |
Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure |
Insulation resistance of the inverter for the generator (MG1), motor (MG2) and rear motor (MGR), A/C inverter, SMR or high-voltage direct current wire has decreased.*3 (1 trip detection logic) |
|
Does not come on |
Master Warning: Comes on |
SAE Code: P0AA6 |
|
P1C8049 |
Hybrid/EV Battery Voltage System Isolation (Rear Motor Area) Internal Electronic Failure |
Insulation resistance of the rear motor area has decreased.*3 (1 trip detection logic) |
|
Does not come on |
Master Warning: Comes on |
SAE Code: P0AA6 |
- *1: for 4WD
HINT:
-
*2: The insulation malfunction detection circuit in the battery ECU assembly monitors the insulation resistance between the high voltage circuits and body. If the insulation resistance decreases, the hybrid vehicle control ECU stores DTC P0AA649 and illuminates the master warning first regardless of malfunction area.
Depending on the vehicle condition, the high voltage circuit insulation resistance may return to normal. So if DTC P0AA649 is output, complete the following steps as soon as possible.
-
*3: If the following operations are performed within the same trip after DTC P0AA649 is stored, just one of the related DTCs (P1C7C49, P1C7D49, P1C7E49, P1C7F49 or P1C8049) will be stored.
-
Apply the parking brake firmly.
NOTICE:
Perform this test with the AUTO function (shift-linked function) of the electric parking brake system off.
HINT:
When the parking brake indicator (red) is illuminated after the electric parking brake switch assembly has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch assembly is pulled to the lock side one more time.
- Wait for 1 minute or more with the vehicle stopped, the brake pedal firmly depressed, the ignition switch ON (READY), shift lever in D and the air conditioning system on (Lo/MAX COOL, blower speed HI).
-
Turn the ignition switch off and wait for 2 minutes or more.
HINT:
- DTCs and freeze frame data are useful information in determining the malfunctioning part. Before performing diagnosis, make sure to check and make a note of all output DTCs and freeze frame data. (Even if a high-voltage insulation malfunction cannot be reproduced, once stored, insulation malfunction DTCs will not be cleared unless the clear operation is performed.)
- When the insulation resistance of the HV battery area decreases and the ignition switch is turned to ON, DTC P1C7D49 is stored within 2 minutes.
-
Apply the parking brake firmly.
- When measuring insulation resistance using a megohmmeter, measure the resistance while jiggling the high voltage wire harness.
CONFIRMATION DRIVING PATTERN
CONFIRMATION AFTER REPLACING PARTS
HINT:
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure. (Do not turn the ignition switch off (READY off) during this inspection.)
Click here
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- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and turn the GTS on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for 2 minutes or more.
-
Apply the parking brake and secure the wheels using chocks.
NOTICE:
Perform this test with the AUTO function (shift-linked function) of the electric parking brake system off.
HINT:
When the parking brake indicator (red) is illuminated after the electric parking brake switch assembly has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch assembly is pulled to the lock side one more time.
- When the vehicle is stationary, turn the ignition switch to ON (READY) with shift lever in P and wait for 1 minute or more.
- Turn the air conditioning system on (MAX COLD, blower speed HI).
-
While depressing the brake pedal without depressing the accelerator pedal, move the shift lever to D and wait for 5 minutes.
- If step A is performed within the same trip after DTC P0AA649 is stored, the parts with insufficient insulation resistance will be determined and a DTC (P1C7C49, P1C7D49, P1C7E49, P1C7F49 or P1C8049) will be stored.
- If no DTCs are output, proceed to the next step.
-
Drive the vehicle for approximately 5 minutes referring to the following freeze frame data items: "Vehicle Speed", "Shift Position", "Accelerator Position", "Engine Speed", "Coolant Temperature", "Master Cylinder Control Torque", "Inverter Coolant Water Temperature", "Generator Inverter Calculated Temperature" and "Motor Inverter Temperature"
(If the freeze frame data item "Vehicle Speed" is 10 km/h (6 mph) or less, drive the vehicle at 10 km/h (6 mph) or more.)
- If step A is performed within the same trip after DTC P0AA649 is stored, the parts with insufficient insulation resistance will be determined and a DTC (P1C7C49, P1C7D49, P1C7E49, P1C7F49 or P1C8049) will be stored.
- If DTC P0AA649 is output, complete Step A immediately as quickly as possible.
- Wait for 1 minute or more with the vehicle stopped, the ignition switch ON (READY), shift lever in P and the air conditioning system on (Lo/COOL MAX, blower speed HI), then turn the ignition switch off and wait for 2 minutes or more. (Step A)
- Turn the ignition switch to ON and turn the GTS on.
- Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
-
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.
WIRING DIAGRAM
|
*1 |
HV Battery |
*2 |
Battery ECU assembly |
|
*3 |
SMRB |
*4 |
SMRG |
|
*5 |
Service Plug Grip |
*6 |
Inverter with Converter Assembly |
|
*7 |
Boost Converter |
*8 |
Inverter |
|
*9 |
Generator (MG1) |
*10 |
Motor (MG2) |
|
*11 |
Compressor with Motor Assembly |
*12 |
A/C Inverter |
|
*13 |
A/C Motor |
*14 |
Rear Motor (MGR) (for AWD) |
|
*a |
High-voltage Areas |
*b |
DTC P0AA649 Vehicle Insulation Resistance Reduction Area |
|
*c |
DTC P1C7C49 Air Conditioning System Area |
*d |
DTC P1C7D49 HV Battery Area |
|
*e |
DTC P1C7E49 Hybrid Vehicle Transaxle Assembly Area or Inverter with Converter Assembly AC (Alternation Current) Section Area |
*f |
DTC P1C7F49 High Voltage Direct Current Area |
|
*g |
DTC P1C8049 Rear Motor Area |
- |
- |
SYSTEM DESCRIPTION
HINT:
If a decrease in insulation resistance cannot be confirmed using a megohmmeter, check "Short Wave Highest Value Level" in the Data List.
SHORT WAVE HIGHEST VALUE LEVEL
(a) "Short Wave Highest Value Level" shows a decrease in insulation resistance. When insulation resistance decreases, "Insulation Lower" will be displayed. However, even though the insulation resistance of the vehicle is normal, "Short Wave Highest Value Level" may decrease, so that "Not Judge" will be displayed for any of the following conditions.
- Within approximately 1 minute since the ignition switch was turned to ON.
- When the system voltages ("Hybrid/EV Battery Voltage", "VL-Voltage before Boosting", "VL-Voltage before Boosting for Rear Motor" and "VH-Voltage after Boosting") are changing.
- During boosting. If the Data List item "Boost Ratio" is not 0% or within a few seconds of it becoming 0%. (The values of "Hybrid/EV Battery Voltage", "VL-Voltage before Boosting", "VL-Voltage before Boosting for Rear Motor" and "VH-Voltage after Boosting" are about the same when not boosting.)
-
When "No" is displayed for any of the following Data List items:
- Short Wave Highest Value Availability just after MG Inv On/Off
- Short Wave Highest Value Availability just after A/C Inv On/Off
- Short Wave Highest Value Availability just after SMR On/Off
- Short Wave Highest Value Availability just after Rear Motor Inv On/Off
(b) When "Short Wave Highest Value Level" shows "Insulation Lower LV3", insulation resistance will be close to 0 Ω. In this case, damage to a high-voltage cable or hybrid component (high-voltage), or a short to body ground due to intrusion of foreign matter, such as metal particles, can be suspected.
- If problem symptoms cannot be reproduced and a malfunction still exists after replacing a part as instructed, checking the following freeze frame data can help determine a trouble area.
Items to be Checked Using Freeze Frame Data:
|
Freeze Frame Data |
Diagnostic Note |
|---|---|
|
Short Wave Highest Value Level |
Indicates that the insulation resistance has decreased. |
|
|
During boosting (when "Boost Ratio" is not 0%), or when "VL-Voltage before Boosting", "VL-Voltage before Boosting for Rear Motor", "VH-Voltage after Boosting" or "Hybrid/EV Battery Voltage" is varying, "Short Wave Highest Value Level" may decrease even though the insulation resistance is normal. |
|
When "SMRB Status" and "SMRG Status" are all OFF, the insulation malfunction detection circuit detects a decrease in insulation resistance in the HV battery area ((*d) in the wiring diagram). Example:
|
|
Motor Inverter Shutdown Status |
When "Motor Inverter Shutdown Status" is ON, the insulation malfunction detection circuit cannot detect a decrease in insulation resistance in the motor system AC (alternating current) section (motor (MG2) side of (*e) in the wiring diagram). The motor system AC (alternating current) section includes the motor (MG2) in the hybrid vehicle transaxle assembly, motor cables and the AC (alternating current) section of the motor drive circuit in the inverter with converter assembly. |
|
Generator Inverter Shutdown Status |
When "Generator Inverter Shutdown Status" is ON, the insulation malfunction detection circuit cannot detect a decrease in insulation resistance in the generator system AC (alternating current) section (generator (MG1) side of (*e) in the wiring diagram). The generator system AC (alternating current) section includes the generator (MG1) in the hybrid vehicle transaxle assembly, generator cables and the AC (alternating current) section of the generator drive circuit in the inverter with converter assembly. |
|
Rear Motor Inverter Shutdown Status |
When "Rear Motor Inverter Shutdown Status" is ON, the insulation malfunction detection circuit cannot detect a decrease in insulation resistance in the rear motor system AC (alternating current) section ((*g) in the wiring diagram). The rear motor system AC (alternating current) section includes the rear motor (MGR) in the rear traction motor with transaxle assembly, rear traction motor cables and the AC (alternating current) section of the rear motor drive circuit in the inverter with converter assembly. |
|
A/C Consumption Power |
The compressor with motor assembly AC (alternating current) section ((*c) in the wiring diagram) includes the air conditioning motor, wiring between the air conditioning motor and air conditioning inverter, and the AC (alternating current) section of the air conditioning motor drive circuit in the air conditioning inverter. With the vehicle stopped, turn on/off the air conditioning system and observe "Short Wave Highest Value Level" to use as a diagnosis reference. |
RELATED FREEZE FRAME DATA
HINT:
-
Reproducing the vehicle conditions the moment a DTC was stored according to the freeze frame data and results of the customer problem analysis helps ensure that the same DTC is stored again.
Driving Status
Item
Diagnostic Note
Vehicle Speed
-
Accelerator Position Sensor No.1 Voltage %
-
Engine Speed
-
Shift Position
-
Master Cylinder Control Torque
-
Coolant Temperature
-
Operation Conditions
Item
Diagnostic Note
Motor Temperature
If any liquid leaks into the ATF, insulation resistance may decrease only when the temperature is high.
The motor temperature is likely to increase if the motor speed is low and output torque is high such as when cruising uphill slowly or accelerating from a low speed.
Generator Temperature
If any liquid leaks into the ATF, insulation resistance may decrease only when the temperature is high.
The generator temperature is likely to increase under repeat acceleration and deceleration while the vehicle is driven in the mid speed range (60 to 80 km/h (37 to 50 mph)).
Rear Motor Temperature
If any liquid leaks into the ATF, insulation resistance may decrease only when the temperature is high.
The rear motor temperature is likely to increase if the motor speed is low and output torque is high such as when cruising uphill slowly or accelerating from a low speed.
-
Customer Problem Analysis
Ask the customer about the operating conditions and environment when the malfunction occurred.
Item
Diagnostic Note
Driving Condition (acceleration, deceleration, turning, etc.)
Changes in the insulation of the parts with insufficient insulation due to changes in G force or vibration are suspected.
Road Condition (unpaved, etc.)
Weather (rain, snow, etc.)
Water intrusion is suspected
Washing the vehicle (Whether the malfunction occurred after washing the vehicle?)
CAUTION / NOTICE / HINT
CAUTION:
-
Refer to the precautions before inspecting high voltage circuit.
Click here
-
When troubleshooting DTC P0AA649, use either a tool wrapped with vinyl insulation tape or an insulated tool. (It is extremely dangerous when a high-voltage charge passes through a non-insulated tool causing a short.)
NOTICE:
-
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
-
When disconnecting and reconnecting the auxiliary battery
HINT:
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
Click here
HINT:
- When measuring insulation resistance using a megohmmeter, set the megohmmeter to 500 V.
-
P0AA649, P1C7C49, P1C7D49, P1C7E49, P1C7F49 or P1C8049 may be output as a result of the malfunction indicated by the DTCs in table below.
- The chart above is listed in inspection order of priority.
- Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
|
Malfunction Content |
System |
Relevant DTC |
|
|---|---|---|---|
|
Microcomputer malfunction |
Hybrid control system |
P060647 |
Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU Failure |
|
P060A29 |
Hybrid/EV Powertrain Control Module Monitoring Processor Signal Invalid |
||
|
P060A44 |
Hybrid/EV Powertrain Control Module Monitoring Processor Data Memory Failure |
||
|
P060A45 |
Hybrid/EV Powertrain Control Module Monitoring Processor Program Memory Failure |
||
|
P060A49 |
Hybrid/EV Powertrain Control Module Monitoring Processor Internal Electronic Failure |
||
|
P060B1C |
Hybrid/EV Powertrain Control Module A/D Processing Voltage Out of Range |
||
|
P060B71 |
Hybrid/EV Powertrain Control Module A/D Processing Actuator Stuck |
||
|
P1CE31C |
Hybrid/EV Powertrain Control Module Monitoring Processor A/D Processing Voltage Out of Range |
||
|
P1CE349 |
Hybrid/EV Powertrain Control Module Monitoring Processor A/D Processing Internal Electronic Failure |
||
|
P1CE371 |
Hybrid/EV Powertrain Control Module Monitoring Processor A/D Processing Actuator Stuck |
||
|
Hybrid battery system |
P060687 |
Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message |
|
|
P060A47 |
Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure |
||
|
P060A87 |
Hybrid/EV Battery Energy Control Module Processor from Monitoring Processor Missing Message |
||
|
P060B49 |
Hybrid/EV Powertrain Control Module A/D Processing Internal Electronic Failure |
||
|
P062F46 |
Hybrid/EV Battery Energy Control Module EEPROM Calibration / Parameter Memory Failure |
||
|
Power Source Circuit Malfunction |
Hybrid control system |
P06881F |
ECM/PCM Power Relay Sense Circuit Intermittent |
|
System malfunction |
Hybrid control system |
P1C9E9F |
Hybrid/EV System Reset Stuck Off |
PROCEDURE
|
1. |
CHECK DTC OUTPUT (HYBRID CONTROL) |
(a) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes
NOTICE:
- DTC P1C7C49, P1C7D49, P1C7E49, P1C7F49 and P1C8049 are not stored with P0AA649 at the same time. If a drop in insulation resistance is detected and DTC P0AA649 is output, wait for 1 minute with the ignition switch ON (READY), the shift lever in D and the air conditioning system on within the same trip, then turn the ignition switch off and wait for 2 minutes to determine the DTC (P1C7C49, P1C7D49, P1C7E49, P1C7F49 or P1C8049).
- If only DTC P0AA649 is output, perform the diagnostic procedure for DTC P0AA649 to inspect all of the high voltage circuits.
- When any other DTC indicating parts which the insulation resistance dropped are output, perform the diagnostic procedure for each DTC.
|
Result |
Proceed to |
|---|---|
|
P0AA649 (decrease in the insulation resistance of the high-voltage circuit) only is output. |
A |
|
P0AA649 and P1C7C49 (decrease in the insulation resistance of the air conditioning system area) are output. |
B |
|
P0AA649 and P1C7D49 (decrease in the insulation resistance of the HV battery area) are output. |
C |
|
P0AA649 and P1C7E49 (decrease in the insulation resistance of the hybrid vehicle transaxle assembly area) are output. |
D |
|
P0AA649 and P1C7F49 (decrease in the insulation resistance of the high-voltage direct current area) are output. |
E |
|
P0AA649 and P1C8049 (decrease in the insulation resistance of the rear motor area) are output. |
F |
(b) Turn the ignition switch off.
| B |
|
| C |
|
| D |
|
| E |
|
| F |
|
|
|
2. |
CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR CABLE (FOR MG2)) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Disconnect the motor cable from the inverter with converter assembly. HINT: Make sure that no foreign matter, coolant or water enters the inverter with converter assembly. |
|
(c) Connect the cable to the negative (-) auxiliary battery terminal.
(d) Turn the ignition switch to ON.
NOTICE:
Turning the ignition switch to ON with the service plug grip removed causes DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Move the shift lever to N and lift the vehicle.
(f) Turn the ignition switch off.
|
(g) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below while rotating the front wheels 2 revolutions in the same direction simultaneously. NOTICE:
HINT: As the insulation resistance may vary when motor (MG2) rotates, perform this inspection while rotating the front wheels. Standard Resistance:
|
|
(h) Lower the vehicle and move the shift lever to P.
(i) Disconnect the cable from the negative (-) auxiliary battery terminal.
| NG |
|
|
|
3. |
CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MOTOR CABLE (FOR MG1)) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Connect the cable to the negative (-) auxiliary battery terminal.
(c) Turn the ignition switch to ON.
NOTICE:
Turning the ignition switch to ON with the service plug grip removed causes DTCs to be stored. Clear the DTCs after performing this inspection.
(d) Move the shift lever to N and lift the vehicle.
(e) Turn the ignition switch off.
|
(f) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below while rotating the front wheels 2 revolutions in the same direction simultaneously. NOTICE:
HINT: As the insulation resistance may vary when generator (MG1) rotates, perform this inspection while rotating the front wheels. Standard Resistance:
|
|
(g) Lower the vehicle and move the shift lever to P.
(h) Disconnect the cable from the negative (-) auxiliary battery terminal.
|
Result |
Proceed to |
|---|---|
|
OK (for 4WD) |
A |
|
OK (for 2WD) |
B |
|
NG |
C |
| B |
|
| C |
|
|
|
4. |
CHECK REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY (HV FLOOR UNDER WIRE (REAR TRACTION MOTOR CABLE)) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Disconnect the HV floor under wire (rear traction motor cable) from the inverter with converter assembly. HINT: Make sure that no foreign matter, coolant or water enters the inverter with converter assembly. |
|
(c) Connect the cable to the negative (-) auxiliary battery terminal.
(d) Turn the ignition switch to ON.
NOTICE:
Turning the ignition switch to ON with the service plug grip removed causes DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Move the shift lever to N and lift the vehicle.
(f) Turn the ignition switch off.
|
(g) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below while rotating the rear wheels 2 revolutions in the same direction simultaneously. NOTICE:
HINT: As the insulation resistance may vary when rear motor (MGR) rotates, perform this inspection while rotating the rear wheels. Standard Resistance:
|
|
(h) Lower the vehicle and move the shift lever to P.
(i) Disconnect the cable from the negative (-) auxiliary battery terminal.
| NG |
|
|
|
5. |
CHECK HV AIR CONDITIONING WIRE |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Disconnect the HV air conditioning wire from the inverter with converter assembly. HINT: Make sure that no foreign matter has entered or contaminated the HV air conditioning wire. |
|
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE:
Standard Resistance: for 2WD:
Standard Resistance: for 4WD:
|
|
| NG |
|
|
|
6. |
CHECK FLOOR UNDER WIRE |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Disconnect the HV floor under wire from the inverter with converter assembly. HINT: Make sure that no foreign matter has entered or contaminated the HV floor under wire. |
|
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE:
Standard Resistance:
HINT: Visually inspect the HV floor under wire for damage. If there is any damage, then this is the likely cause of low insulation resistance. |
|
| NG |
|
|
|
7. |
CHECK INVERTER WITH CONVERTER ASSEMBLY |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Connect the HV floor under wire to the inverter with converter assembly. |
|
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE: Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected. Standard Resistance:
HINT: Perform this inspection with the motor cable, HV floor under wire and HV air conditioning wire disconnected from the inverter with converter assembly. |
|
| OK |
|
| NG |
|
|
8. |
CHECK MOTOR CABLE (FOR MG2) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the motor cable from the hybrid vehicle transaxle assembly.
Click here
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE: Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected. Standard Resistance:
|
|
| OK |
|
| NG |
|
|
9. |
CHECK FLOOR UNDER WIRE (REAR TRACTION MOTOR CABLE) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Remove the HV floor under wire (rear traction motor cable) from the rear traction motor with transaxle assembly. Click here
|
|
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE: Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected. Standard Resistance:
|
|
| OK |
|
| NG |
|
|
10. |
CHECK MOTOR CABLE (FOR MG1) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the motor cable from the hybrid vehicle transaxle assembly.
Click here
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE: Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected. Standard Resistance:
|
|
| OK |
|
| NG |
|
|
11. |
CHECK HV BATTERY (HIGH VOLTAGE CABLE) |
CAUTION:
Be sure to wear insulated gloves and protective goggles.
HINT:
Make sure that no foreign matter or water has entered the HV battery.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Disconnect the battery ECU assembly connectors. NOTICE: Insulate each disconnected high-voltage connector with insulating tape. Wrap the connector from the wire harness side to the end of the connector. |
|
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE: Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected. Standard Resistance:
|
|
| NG |
|
|
|
12. |
REPLACE BATTERY ECU ASSEMBLY |
Click here
| NEXT |
|
|
13. |
CHECK HV BATTERY JUNCTION BLOCK ASSEMBLY |
CAUTION:
Be sure to wear insulated gloves and protective goggles.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Disconnect the high voltage cable connector of the HV battery from the HV battery junction block assembly. NOTICE: Insulate each disconnected high-voltage connector with insulating tape. Wrap the connector from the wire harness side to the end of the connector. |
|
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE: Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected. Standard Resistance:
|
|
| NG |
|
|
|
14. |
REPLACE HV BATTERY |
Click here
| NEXT |
|
|
15. |
CHECK INVERTER WITH CONVERTER ASSEMBLY |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Disconnect the motor cable from the inverter with converter assembly. HINT: Make sure that no foreign matter, coolant or water enters the inverter with converter assembly. |
|
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE: Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected. Standard Resistance:
HINT: Perform this inspection with the motor cable disconnected from the inverter with converter assembly. |
|
| NG |
|
|
|
16. |
CHECK MOTOR CABLE (FOR MG2) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the motor cable from the hybrid vehicle transaxle assembly.
Click here
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE: Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected. Standard Resistance:
|
|
| NG |
|
|
|
17. |
CHECK MOTOR CABLE (FOR MG1) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the motor cable from the hybrid vehicle transaxle assembly.
Click here
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE: Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected. Standard Resistance:
|
|
| NG |
|
|
|
18. |
REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY |
Click here
| NEXT |
|
|
19. |
REPLACE MOTOR CABLE |
Click here
| NEXT |
|
|
20. |
CHECK HIGH VOLTAGE DIRECT CURRENT AREA |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Disconnect the HV floor under wire from the inverter with converter assembly. HINT: Make sure that no foreign matter has entered or contaminated the HV floor under wire. |
|
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE:
Standard Resistance:
HINT: Visually inspect the HV floor under wire for damage. If there is any damage, then this is the likely cause of low insulation resistance. |
|
| NG |
|
|
|
21. |
CHECK HV AIR CONDITIONING WIRE |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Disconnect the HV air conditioning wire from the inverter with converter assembly. HINT: Make sure that no foreign matter has entered or contaminated the HV air conditioning wire. |
|
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE:
Standard Resistance: for 2WD:
Standard Resistance: for 4WD:
|
|
| NG |
|
|
|
22. |
REPLACE INVERTER WITH CONVERTER ASSEMBLY |
Click here
| NEXT |
|
|
23. |
CHECK HV AIR CONDITIONING WIRE |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Disconnect the HV air conditioning wire connector from the compressor with motor assembly. Click here
|
|
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE:
Standard Resistance: for 2WD:
Standard Resistance: for 4WD:
|
|
| NG |
|
|
|
24. |
CHECK COMPRESSOR OIL |
(a) Check that compressor oil other than DN-OIL 11 (e.g. ND-OIL 8, etc.) has not been used.
HINT:
- If even a small amount of oil other than ND-OIL 11 oil is used in the refrigeration cycle (contamination), a DTC related to high voltage system insulation malfunction may be stored.
- If a large amount of oil other than ND-OIL 11 oil is used, a DTC may be output again if components related to the refrigeration cycle (No. 1 cooler evaporator sub-assembly, cooler condenser assembly, compressor with motor assembly, cooler expansion valve, and piping) are not replaced as the voltage insulation properties will not recover.
| NG |
|
|
|
25. |
CLEAR DTC |
(a) Clear the DTCs.
Powertrain > Hybrid Control > Clear DTCs
HINT:
When DTC P1C7C49 is output, the ignition switch cannot be turned to ON (READY), so use the GTS and clear DTC P1C7C49.
|
|
26. |
INSPECT COMPRESSOR WITH MOTOR ASSEMBLY |
CAUTION:
Because the compressor with motor assembly has a high-voltage circuit, wear insulated gloves and pull out the service plug grip to cut off the high-voltage circuit before inspection.
(a) Turn the ignition switch to ON (READY).
(b) Prepare the vehicle according to the table below for 3 minutes.
|
Item |
Condition |
|---|---|
|
Blower Speed |
HI |
|
Set Temperature |
MAX COLD |
|
A/C Switch |
On |
(c) Turn the ignition switch off.
(d) Remove the service plug grip.
Click here
CAUTION:
Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.
NOTICE:
After removing the service plug grip, turning the ignition switch to ON (READY) may cause a malfunction. Do not turn the ignition switch to ON (READY) with the service plug grip removed.
|
(e) Disconnect the compressor with motor assembly connector. |
|
(f) Using a megohmmeter, measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
X1-1 (PE) - Body ground |
Always |
2 MΩ or higher |
|
X1-2 (PB) - Body ground |
Always |
2 MΩ or higher |
| NG |
|
|
|
27. |
INSPECT AIR CONDITIONING CYCLE |
CAUTION:
Because the compressor with motor assembly has a high-voltage circuit, wear insulated gloves and pull out the service plug grip to cut off the high-voltage circuit before inspection.
(a) Reconnect the compressor with motor assembly connector.
(b) Install the service plug grip.
Click here
(c) Turn the ignition switch to ON (READY).
(d) Set the A/C temperature to 25°C (77°F) and blower switch to LO and then operate the compressor with motor assembly for 10 minutes to circulate the refrigerant and collect as much compressor oil as possible in the compressor with motor assembly.
(e) Turn the ignition switch off.
(f) Using a spot cooler or other tool, cool down the compressor with motor assembly for 30 minutes, or leave the vehicle overnight before inspection.
NOTICE:
Do not operate the compressor before inspection.
(g) Remove the service plug grip.
Click here
CAUTION:
Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.
NOTICE:
After removing the service plug grip, turning the ignition switch to ON (READY) may cause a malfunction. Do not turn the ignition switch to ON (READY) with the service plug grip removed.
|
(h) Disconnect the compressor with motor assembly connector. |
|
(i) Using a megohmmeter, measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
X1-1 (PE) - Body ground |
Always |
3 MΩ or higher |
|
X1-2 (PB) - Body ground |
Always |
3 MΩ or higher |
NOTICE:
If the results are out of the specified range, replace the compressor without operating it.
| OK |
|
| NG |
|
|
28. |
REPLACE HV AIR CONDITIONING WIRE |
| NEXT |
|
|
29. |
REPLACE COMPRESSOR WITH MOTOR ASSEMBLY |
Click here
| NEXT |
|
|
30. |
REPLACE AIR CONDITIONING CYCLE |
| NEXT |
|
|
31. |
CHECK FLOOR UNDER WIRE |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Disconnect the HV floor under wire connectors from the HV battery junction block assembly. HINT: Make sure that no foreign matter has entered or contaminated the HV floor under wire. |
|
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE:
Standard Resistance:
HINT: Visually inspect the HV floor under wire for damage. If there is any damage, then this is the likely cause of low insulation resistance. |
|
| NG |
|
|
|
32. |
REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY |
Click here
| NEXT |
|
|
33. |
REPLACE FLOOR UNDER WIRE |
Click here
| NEXT |
|
|
34. |
CHECK INVERTER WITH CONVERTER ASSEMBLY |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Disconnect the HV floor under wire (rear traction motor cable) from the inverter with converter assembly. HINT: Make sure that no foreign matter, coolant or water enters the inverter with converter assembly. |
|
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE: Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected. Standard Resistance:
HINT: Perform this inspection with the HV floor under wire (rear traction motor cable) disconnected from the inverter with converter assembly. |
|
| NG |
|
|
|
35. |
CHECK FLOOR UNDER WIRE (REAR TRACTION MOTOR CABLE) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
|
(b) Remove the HV floor under wire (rear traction motor cable) from the rear traction motor with transaxle assembly. Click here
|
|
|
(c) Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below. NOTICE: Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected. Standard Resistance:
|
|
| NG |
|
|
|
36. |
REPLACE REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY |
Click here
| NEXT |
|
|
37. |
REPLACE INVERTER WITH CONVERTER ASSEMBLY |
Click here
| NEXT |
|
|
38. |
REPLACE FLOOR UNDER WIRE |
Click here
| NEXT |
|
|
|