W/Harness Inspection

HEV Motor System
P0A42 Drive Motor \'A\' Position Sensor Circuit High - Inspection/Repair:_:W/Harness Inspection





Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminal condition. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?





Check short to battery in harness
1. Ignition OFF
2. Disconnect safety plug from the main battery (Wait for more than 5 minutes after disconnecting)
3. Disconnect Drive Motor Position Sensor and MCU main harness connector.
4. Ignition ON
5. Measure voltage between Signal terminal of Drive Motor Position Sensor harness connector and chassis ground.

Specification :0V.




6. Is the measured resistance within specifications?





Check for open in harness
1. Ignition OFF
2. Disconnect safety plug from the main battery (Wait for more than 5 minutes after disconnecting)
3. Disconnect Drive Motor Position Sensor and MCU main harness connector.
4. Measure resistance between Signal terminal of Drive Motor Position Sensor harness connector and Signal terminal of MCU harness connector.

Specification :below 1Ohms




5. Is the measured resistance within specifications?





Check for short between REZ + and REZ－ each other.
1. Ignition "OFF"
2. Disconnect safety plug from the main battery (Wait for more than 5 minutes after disconnecting)
3. Disconnect Drive Motor Position Sensor and MCU main harness connector.
4. Measure resistance between REZ + Signal terminal of MCU harness connector and REZ － Signal terminal of MCU harness connector.

Specification :below 1Ohms




5. Is the measured resistance within specifications?