W/Harness Inspection

Power Circuit Inspection

1. Ignition "OFF"
2. Disconnect CMPS #1 sensor connector
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between power terminal of CMPS #1 harness connector and chassis ground.

Specification : Approx. B+





5. Is voltage within the specification?






Ground Circuit Inspection

1. Ignition "OFF"
2. Measure resistance between ground terminal of CMPS #1 harness connector and chassis ground.

Specification : Approx. 0 Ohm





3. Is resistance within the specification?






Signal Circuit Inspection

1. Check for short to ground in signal harness
(1) Measure resistance between signal terminal of CMPS #1 harness connector and chassis ground.

Specification : Infinite





(2) Is resistance within the specification?





2. Check for short to battery in signal harness
(1) Disconnect PCM connector
(2) Ignition "ON" & Engine "OFF"
(3) Measure voltage between signal terminal of CMPS #1 harness connector and chassis ground

Specification : Approx. 0V





(4) Is voltage within the specification?





3. Check for open in signal harness
(1) Ignition "OFF"
(2) Measure resistance between signal terminal of CMPS #1 harness connector and CMPS #1 signal terminal of the PCM connector.

Specification : Approx. 0 Ohm





(3) Is resistance within the specification?






Terminal and connection 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?