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 go to "Verification Vehicle Repair" procedure.
NO
1) Go to "Signal Circuit Inspection" procedure.

Signal Circuit Inspection

1. Check for open in harness
1. Ignition "OFF".
2. Disconnect ambient temp.sensor.
3. Measure resistance between terminal "1" of ambient temp.sensor and terminal "3" of A/C Control Unit.
A. Specification: Approx. 0 Ohm




4. Is the measured resistance within specifications ?
YES
1) Go to "Ground circuit Inspection" procedure.
NO
1) Check for open in harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Ground Circuit inspection

1. Check for open in ground harness
1. Ignition "OFF"
2. Disconnect ambient temp.sensor.
3. Measure resistance between terminal "2" of ambient temp.sensor and terminal "12" of A/C Control Unit.
A. Specification: Approx. 0 Ohm




4. Is the measured resistance within specifications ?
YES
1) Go to "Component Inspection" procedure.
NO
1) Check for open in ground harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.