Toyota Corolla Cross: Hybrid/EV Battery Stack 2 Cell Circuit Voltage Above Threshold (P1A6017,P31AA17)
DESCRIPTION
The HV battery is composed of 60 cells (3.7 V each) in series. The battery ECU assembly monitors the 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 |
|---|---|---|---|---|---|---|
|
P1A6017 | Hybrid/EV Battery Stack 2 Cell Circuit Voltage Above Threshold |
The voltage of any cell of the No. 2 HV supply stack sub-assembly has exceeded the threshold. (1 trip detection logic) |
| Comes on |
Master Warning: Comes on |
SAE Code: P1A60 |
|
P31AA17 | Hybrid/EV Battery Stack 1 Cell Circuit Voltage Above Threshold |
The voltage of any cell of the No. 1 HV supply stack sub-assembly has exceeded the threshold. (1 trip detection logic) |
| Comes on |
Master Warning: Comes on |
SAE Code: P31AA |
MONITOR DESCRIPTION
If the battery ECU assembly detects that the voltage of a HV battery cell is excessively high, the battery ECU assembly will illuminate the MIL and store a DTC.
MONITOR STRATEGY
|
Related DTCs | P1A60 (INF P1A6017), P31AA (INF P31AA17): Cell voltage high |
|
Required sensors/components | Battery ECU assembly |
|
Frequency of operation | Continuous |
|
Duration | TMC's intellectual property |
|
MIL operation | immediately |
|
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 P1A60 (INF P1A6017) is not detected DTC P31AA (INF P31AA17) 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.
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- When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
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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.
- Turn the ignition switch to ON and turn the GTS on.
- Drive the vehicle on urban roads for approximately 10 minutes.[*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, perform the normal judgment procedure again.
CAUTION / NOTICE / HINT
CAUTION:
Refer to the precautions before inspecting high voltage circuit.
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NOTICE:
- After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
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- 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.
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PROCEDURE
|
1. | CHECK DTC OUTPUT (HV BATTERY) |
(a) Check for DTCs.
Powertrain > HV Battery > Trouble Codes|
Result | Proceed to |
|---|---|
|
"P0C3000 or P31B300" is not output. |
A |
| "P0C3000 or P31B300" is also output. |
B |
(b) Turn the ignition switch off.
| A | .gif) | REPLACE HV BATTERY |
|
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|
2. | REPLACE HV BATTERY |
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| NEXT | | REPLACE HYBRID VEHICLE CONTROL ECU |
