Toyota Corolla Cross: Drive Motor "B" Control Module Unexpected Operation (P0A1C94)
DTC SUMMARY
MALFUNCTION DESCRIPTION
The hybrid vehicle control ECU monitors the motor generator control ECU (MG ECU).
The cause of this malfunction may be the following:
Motor generator control ECU (MG ECU) internal malfunction- Motor generator control ECU (MG ECU) malfunction
DESCRIPTION
The hybrid vehicle control ECU monitors the motor generator control ECU (MG ECU) and stores this DTC when it detects a malfunction.
|
DTC No. | Detection Item |
DTC Detection Condition |
Trouble Area | MIL |
Warning Indicate | Note |
|---|---|---|---|---|---|---|
|
P0A1C94 | Drive Motor "B" Control Module Unexpected Operation |
The motor generator control ECU (MG ECU) value received by the hybrid vehicle control ECU differs from the expected value for a certain period of time. (1 trip detection logic) |
Inverter with converter assembly |
Does not come on | Master Warning: Comes on |
SAE Code: P0A1C |
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 .gif)
- 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.
- Turn the ignition switch to ON and wait for 2 minutes or more.
- Enter the following menus: Powertrain / Hybrid Control / 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.
PROCEDURE
|
1. | CHECK DTC OUTPUT (HYBRID CONTROL) |
(a) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes|
Result | Proceed to |
|---|---|
|
P0A1C94 only is output. |
A |
| DTCs except P0A1C94 are output. |
B |
(b) Turn the ignition switch off.
| A | .gif) | REPLACE INVERTER WITH CONVERTER ASSEMBLY |
| B | | GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the susp
