P0A4B

DTC P0A4B-253 Generator Position Sensor Circuit
DTC P0A4C-513 Generator Position Sensor Circuit Range / Performance
DTC P0A4D-255 Generator Position Sensor Circuit Low

DESCRIPTION

DTC Detection Condition:

A resolver is a sensor that detects the position of the magnetic poles, which are indispensable for ensuring highly efficient control of the Motor and Generator.

The resolver structure and method of connection with the MG ECU are the same as those of the motor resolver.

The MG ECU monitors output signals from the resolver and detects a malfunction.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

Component Operating Range:

The MG ECU monitors the generator resolver output signal. If the MG ECU detects output signals that are out of the normal range or specification, it will conclude that there is a malfunction of the generator resolver. The HV control ECU will illuminate the MIL and set a DTC.

Wiring Diagram:

Step 1-2:

Step 2(continued)-4:

Step 4(continued):

INSPECTION PROCEDURE

CAUTION:
- Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 5 minutes before touching any of the high-voltage connectors or terminals.

NOTE: Check the output DTCs again after the repair has been completed. If P0A78-286, P0A7A-324, or P0A79-696 is output, replace the w/ converter inverter assembly.

HINT:
- If the problem symptom cannot be reproduced, performing the driving test on a road on which the vehicle tends to vibrate will make it easier to reproduce the symptom.
- If INF code 253 is output, an interphase short in the resolver circuit may have occurred due to water in the resolver. Thus, if the malfunction is not reproduced, it must be the HV transaxle assembly to replace at the last step.
- At least 5 minutes is required to discharge the high-voltage capacitor inside the w/ converter inverter assembly.