W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) 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 go to "Verification of Vehicle Repair" procedure
NO
1) Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure

Check Brake Test Switch

1. Reconnect stop lamp connector.
2. Disconnect ECM harness connector.
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between terminal 74 of the ECM harness connector and chassis ground
A. Specification:









5. Is voltage within the specification ?
YES
1) Go to next step as below
NO
1) Check for open or short in signal circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure

Check Brake Warning Switch

1. Measure voltage between terminal 83 of the ECM harness connector and chassis ground









2. Is voltage within the specification ?
YES
1) Go to Component Inspection
NO
1) Check for open or short in signal circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure