W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminal condition. 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

1. IG "OFF" and disconnect CMPS connector.
2. IG "ON" and ENG "OFF"
3. Measure voltage between terminal 1 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

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




(4) Is the measured voltage within specification?
YES
- Go to "Check short in harness" as follows.
NO
- Go to "Check open in harness" as follows.
2. Check short in harness
(1) IG "OFF" and disconnect CMPS connector.
(2) Measure resistance between terminals 1 and 3 of CMPS (B2) harness connector.
A. Specification : Infinite Ohms




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




(3) Is the measured resistance within specification?
YES
- Go to "Ground Circuit Inspection" procedure.
NO
- Repair short to ground in harness, and go to "Verification of Vehicle Repair" procedure.
4. Check open in harness
(1) IG "OFF" and disconnect CMPS connector and PCM connector.
(2) Measure resistance between terminal 3 of CMPS harness connector and terminal 24 of PCM harness connector.
A. Specification : Below 1 Ohm




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

Ground Circuit inspection

1. IG "OFF" and disconnect CMPS connector.
2. Measure voltage between terminal 3 of CMPS harness connector and chassis ground.
3. Measure voltage between terminals 2 and 3 of CMPS harness connector.
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.