- Hybrid/EV Battery Voltage
- VL-Voltage before Boosting
- VH-Voltage after Boosting
- Boost Ratio
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001GCLY |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P1C2D62; Hybrid/EV Battery "A" Voltage Sensor/Boosting Converter Voltage Sensor "A" Signal Compare Failure; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
|
DTC |
P1C2D62 |
Hybrid/EV Battery "A" Voltage Sensor/Boosting Converter Voltage Sensor "A" Signal Compare Failure |
DTC SUMMARY
MALFUNCTION DESCRIPTION
The hybrid vehicle control ECU detects a VB sensor or VL sensor malfunction.
The cause of this malfunction may be one of the following:
Inverter voltage (VB or VL) sensor internal circuit malfunction
- Voltage sensor malfunction
- Motor generator control ECU (MG ECU) malfunction
- Communication (wire harness) malfunction
High voltage system malfunction
- HV battery malfunction
- HV battery junction block assembly malfunction
- Inverter with converter assembly malfunction
- High-voltage wire harness malfunction
- High-voltage connector or connection malfunction
Inspection Overview
|
Inspection Content |
Reason (Narrow Down in Order Using Inspection Procedures Below) |
Inspection Step |
|---|---|---|
|
Check for DTCs (HV) |
Output DTCs |
1 |
|
Check for DTCs (check voltage sensor malfunction locations) Check for DTCs (drive test) |
Power switch on (READY) (vehicle stopped or being driven) and then check whether DTCs are output again. |
3, 4 |
|
Read value using Techstream |
Data List value |
5 |
|
Check freeze frame data (HV) |
Freeze Frame Data |
6, 7 |
|
Read value using Techstream |
Accelerator and brake pedal simultaneously depressed Data List value |
8 |
DESCRIPTION
For a description of the boost converter.
Click here
![2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0CA300; DC/DC Converter Step Up Voltage Performance+](/t3Portal/stylegraphics/info.gif)
The MG ECU uses a voltage sensor (VL) that is built into the boost converter to detect the high voltage before it is boosted. The ECU also uses the battery voltage sensor to detect HV battery voltage (VB).
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Warning Indicate |
|---|---|---|---|---|---|
|
P1C2D62 |
Hybrid/EV Battery "A" Voltage Sensor/Boosting Converter Voltage Sensor "A" Signal Compare Failure |
Voltages from HV battery voltage (VB) sensor and boost converter voltage (VL) sensor deviate: Difference between "VL-Voltage before Boosting" and "Hybrid/EV Battery Voltage" is large when the boosting request is given. (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
Related Data List
|
DTC No. |
Data List |
|---|---|
|
P1C2D62 |
|
MONITOR DESCRIPTION
The hybrid vehicle control ECU monitors signals of HV battery voltage (VB) and boost converter voltage (VL) sensors. When a large difference occurs between the voltages from the VB and VL sensors, the hybrid vehicle control ECU interprets this as a failure of either of the sensors. The hybrid vehicle control ECU will illuminate the MIL and store a DTC.
MONITOR STRATEGY
|
Related DTCs |
P1C2D (INF P1C2D62): Hybrid / EV battery voltage / DC/DC converter voltage correlation |
|
Required sensors/components |
Boost converter |
|
Frequency of operation |
- |
|
Duration |
TMC's intellectual property |
|
MIL operation |
1 driving cycle |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
|
The monitor will run whenever the following DTCs are not stored |
TMC's intellectual property |
|
Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
|
TMC's intellectual property |
- |
COMPONENT OPERATING RANGE
|
Hybrid vehicle control ECU |
DTC P1C2D (INF P1C2D62) is not detected |
CONFIRMATION DRIVING PATTERN
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.
Click here
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for 2 minutes or more.
- Turn the power switch on (IG) and turn the Techstream on.
- Turn the power switch on (READY). [*1]
- With the shift lever in D, depress both the accelerator pedal and brake pedal at the same time to raise the "Hybrid/EV Battery SOC" to a sufficient level. [*2]
- Move the shift lever to P, check that the engine is stopped and move the shift lever to N. [*3]
- Set the A/C for maximum cooling. [*4]
-
Leave the vehicle for a few minutes. [*5]
HINT:
- When the accelerator pedal is not depressed with the power switch on (READY) and shift lever in P, if "VL-Voltage before Boosting" and the "Hybrid/EV Battery Voltage" is approximately the same after repair, the condition is judged as normal.
-
[*1] to [*5] : Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- 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 or N/A, perform the normal judgment procedure again.
PROCEDURE
|
1. |
CHECK DTC OUTPUT (HYBRID CONTROL, MOTOR GENERATOR) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control and Motor Generator / Trouble Codes.
(d) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes
Powertrain > Motor Generator > Trouble Codes
|
Result |
Proceed to |
|---|---|
One of the following applies:
|
A |
|
P1C2D62 and P0E311C or P0CA300 are output at the same time. |
B |
|
P1C2D62 and P0B231C are output at the same time. |
C |
|
DTCs of hybrid control system in the tables below are output. |
D |
|
DTCs of motor generator control system in the tables below are output. |
E |
|
Malfunction Content |
System |
Relevant DTC |
|
|---|---|---|---|
|
Microcomputer malfunction |
Hybrid control system |
P060647 |
Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU Failure |
|
P0A1B49 |
Drive Motor "A" Control Module Internal Electronic Failure |
||
|
P0AFC00 |
Hybrid/EV Battery Sensor Module |
||
|
P0AFC96 |
Hybrid/EV Battery Sensor Module Component Internal Failure |
||
|
Motor generator control system |
P0A1A47 |
Generator Control Module Watchdog / Safety MC Failure |
|
|
P0A1A49 |
Generator Control Module Internal Electronic Failure |
||
|
P0A1B1F |
Generator Control Module Circuit Intermittent |
||
|
P1C2A1C |
Generator A/D Converter Circuit Circuit Voltage Out of Range |
||
|
P1C2A49 |
Generator A/D Converter Circuit Internal Electronic Failure |
||
|
P313383 |
Communication Error from Generator to Drive Motor "A" Value of Signal Protection Calculation Incorrect |
||
|
P313386 |
Communication Error from Generator to Drive Motor "A" Signal Invalid |
||
|
P313387 |
Communication Error from Generator to Drive Motor "A" Missing Message |
||
|
Power source circuit malfunction |
Hybrid control system |
P0AFC16 |
Hybrid/EV Battery Sensor Module Circuit Voltage Below Threshold |
|
Motor generator control system |
P06D61C |
Generator Control Module Offset Power Circuit Voltage Out of Range |
|
|
Communication system malfunction |
Hybrid control system |
P312387 |
Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message |
|
U029A87 |
Lost Communication with Hybrid/EV Battery Sensor Module Missing Message |
||
|
Sensor and actuator circuit malfunction |
Hybrid control system |
P0B3B14 |
Hybrid/EV Battery Voltage Sensor "A" Circuit Short to Ground or Open |
|
P0B4014 |
Hybrid/EV Battery Voltage Sensor "B" Circuit Short to Ground or Open |
||
|
P0B4514 |
Hybrid/EV Battery Voltage Sensor "C" Circuit Short to Ground or Open |
||
|
P0B4A14 |
Hybrid/EV Battery Voltage Sensor "D" Circuit Short to Ground or Open |
||
|
P0B4F14 |
Hybrid/EV Battery Voltage Sensor "E" Circuit Short to Ground or Open |
||
|
P0B5414 |
Hybrid/EV Battery Voltage Sensor "F" Circuit Short to Ground or Open |
||
|
P0B5914 |
Hybrid/EV Battery Voltage Sensor "G" Circuit Short to Ground or Open |
||
|
P0B5E14 |
Hybrid/EV Battery Voltage Sensor "H" Circuit Short to Ground or Open |
||
|
P0B6314 |
Hybrid/EV Battery Voltage Sensor "I" Circuit Short to Ground or Open |
||
|
P0B6814 |
Hybrid/EV Battery Voltage Sensor "J" Circuit Short to Ground or Open |
||
|
P308A13 |
Hybrid/EV Battery Voltage Sensor All Circuit Open |
||
|
P0AFC62 |
Hybrid/EV Battery Sensor Module Signal Compare Failure |
||
|
P308A12 |
Hybrid/EV Battery Voltage Sensor All Circuit Short to Auxiliary Battery |
||
|
System malfunction |
Motor generator control system |
P0E3116 |
DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Below Threshold |
|
P0E3117 |
DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold |
||
HINT:
-
P1C2D62 may be output as a result of the malfunction indicated by the DTCs above.
- 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.)
(e) Turn the power switch off.
| B |
|
REPLACE INVERTER WITH CONVERTER ASSEMBLY
|
| C |
|
| D |
|
GO TO DTC CHART (HYBRID CONTROL SYSTEM)
|
| E |
|
|
|
2. |
CLEAR DTC |
Click here
|
|
3. |
CHECK DTC OUTPUT (CHECK FAILURE PART) |
(a) Apply the parking brake and secure the wheels using chocks.
NOTICE:
Perform this test with the AUTO function (shift-linked function) of the electronic parking brake system off.
HINT:
When the parking brake indicator (red) is illuminated after the electric parking brake switch (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 (electric parking brake switch assembly) is pulled to the lock side one more time.
(b) Connect the Techstream to the DLC3. *1
(c) Turn the power switch on (READY). *2
(d) Enter the following menus: Powertrain / Hybrid Control / Data List / Hybrid/EV Battery SOC and Hybrid/EV Battery Current. *3
Powertrain > Hybrid Control > Data List
|
Tester Display |
|---|
|
Hybrid/EV Battery SOC |
|
Hybrid/EV Battery Current |
(e) If the value of "Hybrid/EV Battery SOC" is less than 55%, move the shift lever to D and charge the HV battery by depressing the accelerator pedal and brake pedal simultaneously until the value reaches 55% or more. *4
(f) Move the shift lever to P. *5
(g) Set the air conditioning to MAX COOL and turn the headlights on. *6
(h) Confirm that "Hybrid/EV Battery Current" is more than 3 A. *7
(i) With the engine stopped and the conditions of steps *5, *6 and *7 satisfied, leave the vehicle for 15 seconds. *8
(j) Enter the following menus: Powertrain / Hybrid Control and Motor Generator / Trouble Codes. *9
(k) Check for DTCs. *10
Powertrain > Hybrid Control > Trouble Codes
Powertrain > Motor Generator > Trouble Codes
NOTICE:
If the low HV battery information comes on, move the shift lever to P and start the engine to charge the HV battery. After the engine stops, perform steps *1 through *10 again.
|
Result |
Proceed to |
|---|---|
|
No DTCs are output, or DTCs except the following are output. |
A |
|
P0E311C or P0CA300 are output. |
B |
|
P0B231C or P1C8349 are output. |
C |
|
P300000 is output. |
D |
(l) Turn the power switch off.
| B |
|
REPLACE INVERTER WITH CONVERTER ASSEMBLY
|
| C |
|
| D |
|
LEAVE VEHICLE WITH SHIFT LEVER IN P, AND CHARGE HV BATTERY BY IDLING UNTIL IDLING STOPS (PERFORM STEPS *1 THROUGH *10) |
|
|
4. |
CHECK DTC OUTPUT (ROAD TEST) |
(a) Turn the power switch on (READY). *11
(b) Perform a road test that repeats full acceleration to 60 km/h (37 mph) and then braking to a complete stop three times. *12
CAUTION:
Perform this road test only in an appropriate safe location, in accordance with all local laws.
HINT:
This road test is performed to drive the car under high load and cause a change in the HV battery voltage.
(c) Connect the Techstream to the DLC3. *13
(d) Enter the following menus: Powertrain / Hybrid Control and Motor Generator / Trouble Codes. *14
(e) Check for DTCs. *15
Powertrain > Hybrid Control > Trouble Codes
Powertrain > Motor Generator > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
No DTCs are output, or DTCs except the following are output. |
A |
|
P0E311C or P0CA300 are output. |
B |
|
P0B231C or P1C8349 are output. |
C |
|
P300000 is output. |
D |
(f) Turn the power switch off.
| B |
|
REPLACE INVERTER WITH CONVERTER ASSEMBLY
|
| C |
|
| D |
|
LEAVE VEHICLE WITH SHIFT LEVER IN P, AND CHARGE HV BATTERY BY IDLING UNTIL IDLING STOPS (PERFORM STEPS *11 THROUGH *15) |
|
|
5. |
READ VALUE USING TECHSTREAM (DATA LIST) |
(a) Apply the parking brake and secure the wheels using chocks.
NOTICE:
Perform this test with the AUTO function (shift-linked function) of the electronic parking brake system off.
HINT:
When the parking brake indicator (red) is illuminated after the electric parking brake switch (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 (electric parking brake switch assembly) is pulled to the lock side one more time.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (READY).
(d) Enter the following menus: Powertrain / Hybrid Control / Data List / VL-Voltage before Boosting, VH-Voltage after Boosting, Hybrid/EV Battery SOC and Hybrid/EV Battery Voltage.
Powertrain > Hybrid Control > Data List
|
Tester Display |
|---|
|
VL-Voltage before Boosting |
|
VH-Voltage after Boosting |
|
Hybrid/EV Battery SOC |
|
Hybrid/EV Battery Voltage |
(e) If the value of "Hybrid/EV Battery SOC" is less than 55%, move the shift lever to D and charge the HV battery by depressing the accelerator pedal and brake pedal simultaneously until the value reaches 55% or more.
(f) Release the accelerator pedal, move the shift lever to P and wait for the engine to stop. Read the Data List when the engine stops.
HINT:
If the engine starts, wait until it stops before continuing.
|
Result |
Proceed to |
|---|---|
|
Both of the following are not satisfied. |
A |
|
Both of the following are satisfied:
|
B |
|
Both of the following are satisfied:
|
C |
(g) Turn the power switch off.
| B |
|
REPLACE INVERTER WITH CONVERTER ASSEMBLY
|
| C |
|
|
|
6. |
CHECK FREEZE FRAME DATA (HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Read the freeze frame data of DTC P1C2D62.
Powertrain > Hybrid Control > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
Both of the following are satisfied or both of the following are not satisfied. |
A |
|
"VL-Voltage before Boosting" is less than 168 V or more than 280 V. |
B |
|
"Hybrid/EV Battery Voltage" is less than 168 V or more than 280 V. |
C |
(e) Turn the power switch off.
| B |
|
REPLACE INVERTER WITH CONVERTER ASSEMBLY
|
| C |
|
|
|
7. |
CHECK FREEZE FRAME DATA (HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
(d) Read the freeze frame data of DTC P1C2D62.
Powertrain > Hybrid Control > Trouble Codes
HINT:
In the freeze frame data, read the item "Hybrid/EV Battery Voltage" and all of the "Hybrid/EV Battery Block 1 to 9 Voltage".
|
Result |
Proceed to |
|---|---|
|
Freeze frame data is not stored. |
A |
|
Both of the following are satisfied:
|
B |
|
Neither A nor B is satisfied. |
C |
(e) Turn the power switch off.
| B |
|
REPLACE INVERTER WITH CONVERTER ASSEMBLY
|
| C |
|
|
|
8. |
READ VALUE USING TECHSTREAM (DATA LIST) |
(a) Apply the parking brake and secure the wheels using chocks.
NOTICE:
Perform this test with the AUTO function (shift-linked function) of the electronic parking brake system off.
HINT:
When the parking brake indicator (red) is illuminated after the electric parking brake switch (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 (electric parking brake switch assembly) is pulled to the lock side one more time.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (READY).
(d) Enter the following menus: Powertrain / Hybrid Control / Data List / Hybrid/EV Battery SOC, Hybrid/EV Battery Voltage and Hybrid/EV Battery Block 1 to 9 Voltage.
Powertrain > Hybrid Control > Data List
|
Tester Display |
|---|
|
Hybrid/EV Battery SOC |
|
Hybrid/EV Battery Voltage |
|
Hybrid/EV Battery Block 1 Voltage |
|
Hybrid/EV Battery Block 2 Voltage |
|
Hybrid/EV Battery Block 3 Voltage |
|
Hybrid/EV Battery Block 4 Voltage |
|
Hybrid/EV Battery Block 5 Voltage |
|
Hybrid/EV Battery Block 6 Voltage |
|
Hybrid/EV Battery Block 7 Voltage |
|
Hybrid/EV Battery Block 8 Voltage |
|
Hybrid/EV Battery Block 9 Voltage |
(e) If the value of "Hybrid/EV Battery SOC" is less than 55%, move the shift lever to D and charge the HV battery by depressing the accelerator pedal and brake pedal simultaneously until the value reaches 55% or more.
(f) Release the accelerator pedal, move the shift lever to P and wait for the engine to stop. Read the Data List when the engine stops.
HINT:
If the engine starts, wait until it stops before continuing.
|
Result |
Proceed to |
|---|---|
|
Both of the following are satisfied:
|
A |
|
The preceding condition is not satisfied. |
B |
(g) Turn the power switch off.
| A |
|
REPLACE INVERTER WITH CONVERTER ASSEMBLY
|
| B |
|
|
|