| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001RK0R |
| Model Year Start: 2021 | Model: Avalon HV | Prod Date Range: [08/2020 - ] |
| Title: HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY): P0A9B1C,P0AC51C,P0ACA1C,P0AE81C,P0BC21C,P0C331C; Hybrid/EV Battery Temperature Sensor "A" Voltage Out of Range; 2021 - 2022 MY Avalon HV [08/2020 - ] | ||
|
DTC |
P0A9B1C |
Hybrid/EV Battery Temperature Sensor "A" Voltage Out of Range |
|
DTC |
P0AC51C |
Hybrid/EV Battery Temperature Sensor "B" Voltage Out of Range |
|
DTC |
P0ACA1C |
Hybrid/EV Battery Temperature Sensor "C" Voltage Out of Range |
|
DTC |
P0AE81C |
Hybrid/EV Battery Temperature Sensor "D" Voltage Out of Range |
|
DTC |
P0BC21C |
Hybrid/EV Battery Temperature Sensor "E" Voltage Out of Range |
|
DTC |
P0C331C |
Hybrid/EV Battery Temperature Sensor "F" Voltage Out of Range |
DESCRIPTION
Refer to the description for DTC P0A9B11.
Click here
![2021 - 2022 MY Avalon HV [08/2020 - ]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY): P0A9B11,...,P0C3315; Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground+](/t3Portal/stylegraphics/info.gif)
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Warning Indicate |
|---|---|---|---|---|---|
|
P0A9B1C |
Hybrid/EV Battery Temperature Sensor "A" Voltage Out of Range |
The performance of battery temperature sensor 0 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. |
|
Comes on |
Master Warning Light: Comes on |
|
P0AC51C |
Hybrid/EV Battery Temperature Sensor "B" Voltage Out of Range |
The performance of battery temperature sensor 1 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. |
|
Comes on |
Master Warning Light: Comes on |
|
P0ACA1C |
Hybrid/EV Battery Temperature Sensor "C" Voltage Out of Range |
The performance of battery temperature sensor 2 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. |
|
Comes on |
Master Warning Light: Comes on |
|
P0AE81C |
Hybrid/EV Battery Temperature Sensor "D" Voltage Out of Range |
The performance of battery temperature sensor 3 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. |
|
Comes on |
Master Warning Light: Comes on |
|
P0BC21C |
Hybrid/EV Battery Temperature Sensor "E" Voltage Out of Range |
The performance of battery temperature sensor 4 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. |
|
Comes on |
Master Warning Light: Comes on |
|
P0C331C |
Hybrid/EV Battery Temperature Sensor "F" Voltage Out of Range |
The performance of battery temperature sensor 5 is abnormal; the difference in output between it and other battery temperature sensors is excessively large. |
|
Comes on |
Master Warning Light: Comes on |
Related Data List
|
DTC No. |
Data List |
|---|---|
|
P0A9B1C |
Hybrid/EV Battery Temperature 1 to 6 |
|
P0AC51C |
|
|
P0ACA1C |
|
|
P0AE81C |
|
|
P0BC21C |
|
|
P0C331C |
HINT:
If the vehicle as is left as is for 24 hours, the value of "Hybrid/EV Battery Temperature" will be almost the same as the ambient temperature.
MONITOR DESCRIPTION
If the battery ECU assembly detects a malfunction in the HV battery temperature sensor, the battery ECU assembly illuminates the MIL and set a DTC.
MONITOR STRATEGY
|
Related DTCs |
P0A9C (INF P0A9B1C), P0AC6 (INF P0AC51C), P0ACB (INF P0ACA1C), P0AE9 (INF P0AE81C), P0BC3 (INF P0BC21C), P0C34 (INF P0C331C): Battery temperature sensor malfunction (stuck) |
|
Required sensors/components |
Battery temperature sensor |
|
Frequency of operation |
Continuous |
|
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
|
Battery ECU assembly |
DTC P0A9C (INF P0A9B1C) is not detected DTC P0AC6 (INF P0AC51C) is not detected DTC P0ACB (INF P0ACA1C) is not detected DTC P0AE9 (INF P0AE81C) is not detected DTC P0BC3 (INF P0BC21C) is not detected DTC P0C34 (INF P0C331C) 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.
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- 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.
-
With power switch on (IG) and wait for 10 seconds or more.[*1]
HINT:
[*1]: 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 / HV Battery / 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.
WIRING DIAGRAM
Refer to the wiring diagram for DTC P0A9B11.
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CAUTION / NOTICE / HINT
CAUTION:
-
Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
- Inspecting the high-voltage system
- Disconnecting the low voltage connector of the inverter with converter assembly
- Disconnecting the low voltage connector of the HV battery
-
To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
-
After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
-
After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
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HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
*a
Without waiting for 10 minutes
-
Make sure to insulate the high-voltage connectors and terminals of the HV battery with insulating tape after removing it.
If the HV battery stored without insulating the connectors and terminals, electric shock or fire may result.
-
When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.
*a
Dealer
*b
Battery Collection Agent
- Accidents such as electric shock may result if the HV battery is disposed of improperly or abandoned. Therefore, make sure to return all HV batteries through an authorized collection agent.
-
Before returning the HV battery, make sure to perform a recovery inspection.
Click here
-
Before returning the HV supply stack sub-assembly, make sure to perform a recovery inspection.
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- Make a note of the output DTCs as some of them may be necessary for recovery inspection of the HV battery and HV supply stack sub-assemblies.
-
After removing the HV battery, keep it away from water. Exposure to water may cause the HV battery to produce heat, resulting in a fire.
NOTICE:
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
Click here
PROCEDURE
|
1. |
CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / HV Battery and Hybrid Control / Trouble Codes.
(d) Check for DTCs.
Powertrain > HV Battery > Trouble Codes
Powertrain > Hybrid Control > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
"P0A9B1C, P0AC51C, P0ACA1C, P0AE81C, P0BC21C or P0C331C" only is output, or DTCs except the ones in the table below are also output. |
A |
|
DTCs of hybrid battery system in the table below are output. |
B |
|
DTCs of hybrid control system in the table below are output. |
C |
|
System |
Relevant DTC |
|
|---|---|---|
|
Hybrid battery system |
P060A47 |
Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure |
|
P060B49 |
Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure |
|
|
P060687 |
Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message |
|
|
Hybrid control system |
P0A1F94 |
Hybrid/EV Battery Energy Control Module Unexpected Operation |
(e) Turn the power switch off.
| B |
|
| C |
|
GO TO DTC CHART (HYBRID CONTROL SYSTEM)
|
|
|
2. |
CHECK DTC |
(a) Check the DTCs that were output when the vehicle was brought to the workshop.
|
Result |
Proceed to |
|---|---|
|
"P0A9B1C, P0AC51C or P0ACA1C" is also output. |
A |
|
"P0AE81C, P0BC21C or P0C331C" is also output. |
B |
| B |
|
|
|
3. |
CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR 0 to 2) |
Click here
| OK |
|
REPLACE BATTERY ECU ASSEMBLY
|
| NG |
|
REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY
|
|
4. |
CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR 3 to 5) |
Click here
| OK |
|
REPLACE BATTERY ECU ASSEMBLY
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - NO. 1 HV SUPPLY STACK SUB-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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the No. 1 HV battery hose.
Click here
|
(c) Disconnect the A No. 1 HV supply stack sub-assembly connector. NOTICE: Before disconnecting the connector, check that it is not loose or disconnected. |
|
|
(d) Disconnect the y15 battery ECU assembly connector. NOTICE: Before disconnecting the connector, check that it is not loose or disconnected. |
|
|
(e) Measure the resistance according to the value(s) in the tables below. Standard Resistance (Check for Open):
Standard Resistance (Check for Short):
|
|
(f) Reconnect the y15 battery ECU assembly connector.
(g) Reconnect the A No. 1 HV supply stack sub-assembly connector.
(h) Install the No. 1 HV battery hose.
| OK |
|
REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY
|
| NG |
|
REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY
|
|
|