Toyota Corolla Cross: Hybrid/EV Powertrain Control Module Unexpected Operation (P0A1D94)
DESCRIPTION
The battery ECU assembly monitors the hybrid vehicle control ECU via CAN communication. If the battery ECU assembly detects that the hybrid vehicle control ECU is malfunctioning, it will illuminate the MIL and store a DTC.
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DTC No. | Detection Item |
DTC Detection Condition |
Trouble Area | MIL |
Warning Indicate | Note |
|---|---|---|---|---|---|---|
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P0A1D94 | Hybrid/EV Powertrain Control Module Unexpected Operation |
Hybrid vehicle control ECU internal malfunction: An abnormal signal from the hybrid vehicle control ECU is detected by the battery ECU assembly. (1 trip detection logic) |
Hybrid vehicle control ECU |
Comes on | Master Warning: Comes on | SAE Code: P0A1D |
MONITOR DESCRIPTION
The battery ECU assembly monitors the hybrid vehicle control ECU via CAN communication. If the battery ECU assembly detects a malfunction in the hybrid vehicle control ECU, it will illuminate the MIL and store a DTC.
MONITOR STRATEGY
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Related DTCs | P0A1D (INF P0A1D94): Hybrid powertrain control module |
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Required sensors/components | Hybrid vehicle control ECU |
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Frequency of operation | Continuous |
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Duration | TMC's intellectual property |
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MIL operation | Immediately |
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Sequence of operation | None |
TYPICAL ENABLING CONDITIONS
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The monitor will run whenever the following DTCs are not stored |
TMC's intellectual property |
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Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
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TMC's intellectual property | - |
COMPONENT OPERATING RANGE
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Hybrid vehicle control ECU | DTC P0A1D (INF P0A1D94) 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
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- 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 2 minutes or more.
- Turn the ignition switch to ON and turn the GTS on.
- With ignition switch ON and wait for 2 minutes 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, perform the normal judgment procedure again.
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
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1. | CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU) |
| (a) Check the connections of the hybrid vehicle control ECU connector. Click here OK: The connectors are connected securely and there are no contact problems. |
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| NG | .gif) | CONNECT SECURELY |
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2. | CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU 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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
| (b) Check the connector connections and contact pressure of the relevant terminals for the battery ECU assembly. Click here OK: The connector is connected securely and there are no contact problems. |
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| OK | | REPLACE HYBRID VEHICLE CONTROL ECU |
| NG | | CONNECT SECURELY |
