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
> Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
> Go to "Power Circuit Inspection" procedure.

Power Supply Circuit Inspection

Check voltage
1. IG "OFF" and disconnect CMPS (B2) connector.
2. IG "ON" and ENG "OFF"
3. Measure voltage between power terminal of CMPS (B2) harness connector and chassis ground.
A. Specification : Approx. 5V




4. Is the measured voltage within specification ?
YES
> Go to "Signal Circuit Inspection" procedure.
NO
> Repair open or short to ground in harness, and go to "Verification of Vehicle Repair" procedure.

Signal Circuit Inspection

Check voltage
1. IG "OFF" and disconnect CMPS (B2) connector.
2. IG "ON" and ENG "OFF"
3. Measure voltage between signal terminal of CMPS (B2) harness connector and chassis ground.
A. Specification : Approx. 5V




4. Is the measured voltage within specification ?
YES
1) Go to "Check short in harness" as follows.
NO
1) Go to "Check open in harness" as follows.
Check short in harness
1. IG "OFF" and disconnect CMPS (B2) connector.
2. Measure resistance between signal and power terminals of CMPS (B2) harness connector.
A. Specification : Infinite




3. Is the measured resistance within specification ?
YES
1) Go to "Check short to ground in harness" as follows.
NO
1) Repair short in harness, and go to "Verification of Vehicle Repair" procedure.
Check short to ground in harness
1. IG "OFF" and disconnect CMPS (B2) connector and PCM connector.
2. Measure resistance between signal terminal of CMPS (B2) harness connector and chassis ground.
A. Specification : Infinite




3. Is the measured resistance within specification ?
YES
1) Go to "Ground Circuit Inspection" procedure.
NO
1) Repair short to ground in harness, and go to "Verification of Vehicle Repair" procedure.
Check open in harness
1. IG "OFF" and disconnect CMPS (B2) connector and PCM connector.
2. Measure resistance between signal terminal of CMPS (B2) harness connector and CMPS (B2) signal terminal of PCM harness connector.
A. Specification : Below 1 Ohm




3. Is the measured resistance within specification ?
YES
1) Go to "Ground Circuit Inspection" procedure.
NO
1) Repair open in harness, and go to "Verification of Vehicle Repair" procedure.

Ground Circuit inspection

Check open in harness
1. IG "OFF" and disconnect CMPS (B2) connector and then IG "ON".
2. Measure voltage between signal terminal of CMPS (B2) harness connector and chassis ground. (Measurement "A")
3. Measure voltage between signal and ground terminals of CMPS (B2) harness connector. (Measurement "B")
A. Specification : Measurement "A" - Measurement "B" = Approx. below 200 mV








4. Is the measured voltage within specification ?
YES
> Go to "Component Inspection" procedure.
NO
> Repair open or contact resistance in harness, and go to "Verification of Vehicle Repair" procedure.