| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000026PZE |
| Model Year Start: 2023 | Model: Corolla HV | Prod Date Range: [09/2022 - ] |
| Title: HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10): P1CC81E,P1CC91E; Hybrid/EV Battery Stack 1 Voltage Difference Out of Range; 2023 - 2025 MY Corolla HV [09/2022 - ] | ||
|
DTC |
P1CC81E |
Hybrid/EV Battery Stack 1 Voltage Difference Out of Range |
|
DTC |
P1CC91E |
Hybrid/EV Battery Stack 2 Voltage Difference Out of Range |
DESCRIPTION
The HV battery is composed of 56 cells (3.7 V each) in series. The battery ECU assembly monitors difference in voltage of each HV battery cell to detect malfunctions of the HV battery.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Warning Indicate |
Note |
|---|---|---|---|---|---|---|
|
P1CC81E |
Hybrid/EV Battery Stack 1 Voltage Difference Out of Range |
The difference in voltage of each cell of the No. 1 HV supply stack sub-assembly exceeds the specified value. (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
SAE Code: P33DA |
|
P1CC91E |
Hybrid/EV Battery Stack 2 Voltage Difference Out of Range |
The difference in voltage of each cell of the No. 2 HV supply stack sub-assembly exceeds the specified value. (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
SAE Code: P33DB |
MONITOR DESCRIPTION
If the difference in voltage between each HV battery cell exceeds the specified value, the battery ECU assembly determines that a malfunction has occurred. When the malfunction detection condition is satisfied, the battery ECU assembly will illuminate the MIL and store a DTC.
MONITOR STRATEGY
|
Related DTCs |
P33DA (INF P1CC81E), P33DB (INF P1CC91E): Battery cell malfunction |
|
Required sensors/components |
Battery ECU assembly |
|
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 P33DA (INF P1CC81E) is not detected DTC P33DB (INF P1CC91E) 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
![2023 - 2025 MY Corolla HV [09/2022 - ]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10): UTILITY](/t3Portal/stylegraphics/info.gif)
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- 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 1 hour or more.[*1]
- Turn the ignition switch to ON and turn the GTS on.[*2]
- With ignition switch ON and wait for 10 seconds or more.[*3]
-
Drive the vehicle on urban roads for approximately 10 minutes.[*4]
HINT:
-
[*1] to [*4]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- This DTC may not be stored if the vehicle is stopped or being driven at a constant speed.
-
[*1] to [*4]: Normal judgment procedure.
- Turn the ignition switch to ON and turn the GTS on.
- 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, perform the normal judgment procedure again.
WIRING DIAGRAM
Refer to the wiring diagram for DTC P1A001C.
Click here
CAUTION / NOTICE / HINT
CAUTION:
Refer to the precautions before inspecting high voltage circuit.
Click here
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
PROCEDURE
|
1. |
CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL) |
(a) Check for DTCs.
Powertrain > HV Battery > Trouble Codes
Powertrain > Hybrid Control > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
"P1CC81E or P1CC91E" 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 |
(b) Turn the ignition switch off.
| B |
|
GO TO DTC CHART (HYBRID BATTERY SYSTEM) |
| C |
|
|
|
2. |
CHECK DTC |
(a) Check the DTCs that were output when the vehicle was brought to the workshop.
|
Result |
Proceed to |
|---|---|
|
"P1CC81E" is also output. |
A |
|
"P1CC91E" is also output. |
B |
| B |
|
|
|
3. |
CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR) |
Click here
|
Result |
Proceed to |
|
|---|---|---|
|
OK |
A |
|
|
Not connected securely |
The terminals are not damaged or corroded |
B |
|
Not connected securely |
The terminals are damaged or corroded |
C |
| B |
|
CONNECT SECURELY |
| C |
|
|
|
4. |
CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE) |
(a) Read the value of freeze frame data items "Hybrid/EV battery cell 1 voltage" through "Hybrid/EV battery cell 28 voltage" for DTC P1CC81E and make a note if the value of any is the lowest voltage value.
Powertrain > HV Battery > Trouble Codes
(b) Turn the ignition switch off.
|
|
5. |
CHECK BATTERY ECU ASSEMBLY (GA0 - VA28) |
Click here
|
Result |
Proceed to |
|---|---|
|
The voltage between the terminals is 50 kΩ or more. |
A |
|
Other than above |
B |
| B |
|
|
|
6. |
CHECK TOTAL DISTANCE DRIVEN |
(a) Read the odometer to check the total distance the vehicle has been driven.
|
Result |
Proceed to |
|
|---|---|---|
|
Total distance driven is less than 200000 km (124280 mile) |
A |
|
|
Total distance driven is 200000 km (124280 mile) or more |
Current total distance driven - total distance driven when HV battery junction block assembly replaced = less than 200000 km (124280 mile) *1 |
|
|
Other than above |
B |
|
HINT:
*1: If the HV battery junction block assembly has been replaced, use the total distance driven since it was replaced.
| B |
|
|
|
7. |
REPLACE HV BATTERY |
Click here
|
|
8. |
SIMULATION TEST |
(a) Clear the DTCs and freeze frame data.
Powertrain > HV Battery > Clear DTCs
(b) Drive the vehicle on urban roads for approximately 10 minutes.
|
|
9. |
CHECK DTC OUTPUT (HV BATTERY) |
(a) Check if DTCs are output.
Powertrain > HV Battery > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
"P1CC81E" is output. |
A |
|
"P1CC81E" is not output. |
B |
(b) Turn the ignition switch off.
| A |
|
| B |
|
END |
|
10. |
REPLACE HV BATTERY |
Click here
|
|
11. |
REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY |
Click here
|
|
12. |
SIMULATION TEST |
(a) Clear the DTCs and freeze frame data.
Powertrain > HV Battery > Clear DTCs
(b) Drive the vehicle on urban roads for approximately 10 minutes.
|
|
13. |
CHECK DTC OUTPUT (HV BATTERY) |
(a) Check if DTCs are output.
Powertrain > HV Battery > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
"P1CC81E" is output. |
A |
|
"P1CC81E" is not output. |
B |
(b) Turn the ignition switch off.
| A |
|
| B |
|
END |
|
14. |
REPLACE HV BATTERY |
Click here
| NEXT |
|
|
15. |
CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR) |
Click here
|
Result |
Proceed to |
|
|---|---|---|
|
OK |
A |
|
|
Not connected securely |
The terminals are not damaged or corroded |
B |
|
Not connected securely |
The terminals are damaged or corroded |
C |
| B |
|
CONNECT SECURELY |
| C |
|
|
|
16. |
CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE) |
(a) Read the value of freeze frame data items "Hybrid/EV battery cell 29 voltage" through "Hybrid/EV battery cell 56 voltage" for DTC P1CC91E and make a note if the value of any is the lowest voltage value.
Powertrain > HV Battery > Trouble Codes
(b) Turn the ignition switch off.
|
|
17. |
CHECK BATTERY ECU ASSEMBLY (VAD - VA56) |
Click here
|
Result |
Proceed to |
|---|---|
|
The voltage between the terminals is 50 kΩ or more. |
A |
|
Other than above |
B |
| B |
|
|
|
18. |
CHECK TOTAL DISTANCE DRIVEN |
(a) Read the odometer to check the total distance the vehicle has been driven.
|
Result |
Proceed to |
|
|---|---|---|
|
Total distance driven is less than 200000 km (124280 mile) |
A |
|
|
Total distance driven is 200000 km (124280 mile) or more |
Current total distance driven - total distance driven when HV battery junction block assembly replaced = less than 200000 km (124280 mile) *1 |
|
|
Other than above |
B |
|
HINT:
*1: If the HV battery junction block assembly has been replaced, use the total distance driven since it was replaced.
| B |
|
|
|
19. |
REPLACE HV BATTERY |
Click here
|
|
20. |
SIMULATION TEST |
(a) Clear the DTCs and freeze frame data.
Powertrain > HV Battery > Clear DTCs
(b) Drive the vehicle on urban roads for approximately 10 minutes.
|
|
21. |
CHECK DTC OUTPUT (HV BATTERY) |
(a) Check if DTCs are output.
Powertrain > HV Battery > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
"P1CC91E" is output. |
A |
|
"P1CC91E" is not output. |
B |
(b) Turn the ignition switch off.
| A |
|
| B |
|
END |
|
22. |
REPLACE HV BATTERY |
Click here
|
|
23. |
REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY |
Click here
|
|
24. |
SIMULATION TEST |
(a) Clear the DTCs and freeze frame data.
Powertrain > HV Battery > Clear DTCs
(b) Drive the vehicle on urban roads for approximately 10 minutes.
|
|
25. |
CHECK DTC OUTPUT (HV BATTERY) |
(a) Check if DTCs are output.
Powertrain > HV Battery > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
"P1CC91E" is output. |
A |
|
"P1CC91E" is not output. |
B |
(b) Turn the ignition switch off.
| A |
|
| B |
|
END |
|
26. |
REPLACE HV BATTERY |
Click here
| NEXT |
|
|
|