3.
Has a problem been found?
YES
a.
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
a.
Go to "Knock sensor circuit inspection" procedure.
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.
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 "Knock sensor circuit inspection" procedure.
Check voltage
Key "OFF".
Disconnect Knock sensor connector.
Key "ON".
Measure the voltage between terminal 1 of knock sensor harness connector and chassis ground.
Measure the voltage between terminal 2 of knock sensor harness connector and chassis ground.
Specification : Approx 2.4V
Is the measured voltage within specification ?
YES
Go to "Check Short in signal circuit" procedure.
NO
Repair Oepn or Short in signal circuit and then, go to "Verification of Vehicle Repair" procedure.
Check Shrot in signal circuit
Key "OFF".
Disconnect Knock sensor connector and ECM connector.
Measure the resistance between terminal 1 and 2 of knock sensor harness connector.
Specification : Infinite
Is the measured resistance within specifications ?
YES
Go to "Component inspection" procedure.
NO
Repair Short in signal circuit and then, go to "Verification of Vehicle Repair" procedure.
