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) |
·
HV battery ·
Hybrid vehicle control ECU |
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) |
·
HV battery ·
Hybrid vehicle control ECU |
Comes on | Master Warning:
Comes on |
SAE Code: P31AA |
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.
| 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 |
| The monitor will run whenever the following DTCs are not stored | TMC's intellectual property |
| Other conditions belong to TMC's intellectual property | - |
| TMC's intellectual property | - |
| Battery ECU assembly | DTC P1A60 (INF P1A6017) is not detected
DTC P31AA (INF P31AA17) is not detected |
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.
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
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]
[*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.
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.
Refer to the precautions before inspecting high voltage circuit.
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
When disconnecting and reconnecting the auxiliary battery
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
Check for DTCs.
| Result | Proceed to |
|---|---|
| "P0C3000 or P31B300" is not output. | A |
| "P0C3000 or P31B300" is also output. | B |
Turn the ignition switch off.
A
B
| Proceed to |
|---|
| NEXT |
NEXT