W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals. 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 ?
YES
1) Repair as necessary and then go to "Verification of Vehicle Repair" procedure
NO
1) Go to "Signal Circuit Inspection" procedure

Power Supply Circuit Inspection

1. IG "ON" Engine "OFF".
2. Disconnect the "PCM/TCM" connector
3. Measure voltage between terminal No "49" of TCM harness connector and chassis ground and then terminal No "50" of the TCM harness connector and chassis ground.
A. Specification : Approx. 12V




4. Is voltage within specifications ?
YES
1) Fault is intermittent caused by poor contact in the sensor's and/or PCM/TCM's connector or was repaired and PCM/TCM memory was not cleared.And go to "Verification of Vehicle Repair" procedure.
NO
1) Substitute with a known-good PCM/TCM and check for proper operation. If the problem is corrected, replace PCM/TCM as necessary and then go to "Verification of Vehicle Repair" procedure.