W/Harness Inspection

HEV Control System
P0843 Transmission Fluid Pressure Sensor/Switch \'A\' Circuit High - Inspection/Repair:_:W/Harness Inspection

Terminal and Connector Inspection

1. Perform a visual check of the Electrical systems including the harness connectors and check for corrosion and deformation.plus poor terminals fit.
2. Poor connections can be checked by monitoring signals in current data while moving and lightly pulling on the harness and connectors.
3. Monitoring a DVOM on min/max or the VMI while wiggling connectors may help find the problem.
4. Has a problem been found?






Power Circuit Inspection

Check power in harness
1. Ignition "OFF".
2. Connect Engine Clutch Pressure Sensor harness connector.
3. Ignition "ON".
4. Measure Voltage between Power terminal of Engine Clutch Pressure Sensor harness connector and chassis ground.

Specification :B +




5. Is the measured Voltage within specifications?






Ground Circuit Inspection

Check for open in harness
1. Ignition "OFF".
2. Disconnect Engine Clutch Pressure Sensor and HCU main harness connector.
3. Measure resistance between Ground terminal of Engine Clutch Pressure Sensor harness connector and Ground terminal of HCU harness connector.

Specification :Below 1Ohms




4. Is the measured resistance within specifications?






Signal Circuit Inspection

Check short to battery in harness
1. Ignition "OFF".
2. Disconnect Engine Clutch Pressure Sensor and HCU main harness connector.
3. Ignition "ON"
4. Measure Voltage between Signal terminal of HCU harness connector and chassis ground.

Specification :Approx. 0V




5. Is the measured resistance within specifications?





Check for open in harness
1. Ignition "OFF"
2. Disconnect Engine Clutch Pressure Sensor and HCU main harness connector.
3. Measure resistance between Signal terminal of Engine Clutch Pressure Sensor harness connector and Signal terminal of HCU harness connector.

Specification :Below 1Ohms




4. Is the measured resistance within specifications?