3.
Measure resistance between terminals 2 of the sensor harness connector and 54 of the PCM harness connector.
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 "Ground Circuit Inspection" procedure.
Ignition "OFF".
Disconnect Knock sensor and PCM connectors.
Measure resistance between terminals 2 of the sensor harness connector and 54 of the PCM harness connector.
Specification : Approx. 0Ω
Is resistance within the specification?
YES
▶ Go to "Signal Circuit Inspection" procedure.
NO
▶ Check for an open in the ground circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Check for open in signal harness.
Measure resistance between terminals 1 of sensor harness connector and 10 of the PCM harness connector.
Specification : Approx. 0Ω
Is resistance within the specification?
YES
▶ Go to next step as below.
NO
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Check for short to ground in signal harness.
Measure resistance between terminal 1 of sensor harness connector and chassis ground.
Specification : Infinite
Is resistance within the specification?
YES
▶ Go to next step as below.
NO
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Check for short to power in signal harness
Ignition "ON" & Engine "OFF".
Measure voltage between terminals 1 of sensor harness connector and chassis ground.
Specification : Approx. 0V
Is voltage within the specification?
YES
▶ Go to "Component Inspection" procedure.
NO
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
