Ignition "OFF"

Disconnect CMP sensor connector

Ignition "ON" & Engine "OFF"

Measure voltage between terminal 1 of the sensor harness connector and chassis ground

1)

Specification : Approx. B+

Is voltage within the specification?

YES

▶ Go to "Ground Circuit Inspection" procedure

NO

▶ Check for a open in the power supply circuit between the main relay and the CMPS. Especially check for open or blown 10A sensor fuse.

Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Ignition "OFF"

Measure resistance between terminal 1 of the sensor harness connector and chassis ground.

1)

Specification : Approx. 0Ω

Is resistance within the specification?

YES

▶ Go to "Signal Circuit Inspection" procedure

NO

▶ Check for an open or short to battery in the ground circuit.

Repair as necessary and go to "Verification of Vehicle Repair" procedure

Check for short to ground in signal harness

(1)

Measure resistance between terminal 2 of sensor harness connector and chassis ground.

1)

Specification : Infinite

Check for short to battery in signal harness

(3)

Measure voltage between terminal 2 of sensor harness connector and chassis ground.

1)

Specification : Approx. 0V

Check for open in signal harness

(2)

Measure resistance between terminals 2 of sensor harness connector and 80 of the ECM connector.

1)

Specification : Approx. 0Ω

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.

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

Has a problem been found?

YES

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

NO

▶ Go to next step as below.