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 Vehicle Repair" procedure.
NO
Go to "Signal Circuit Inspection" procedure.
Check for short to battery in signal harness
Ignition "OFF"
Disconnect AP sensor connector.
Measure voltage between terminal 2 of the sensor harness connector and chassis ground.
Specification : Approx. below 1V
Is the measured resistance within specifications ?
YES
▶ Go to " Power Circuit Inspection" procedure.
NO
▶ Check for short to battery in harness.
Repair as necessary and go to "Verification vehicle Repair" procedure.
Ignition "OFF"
Disconnect AP sensor connector.
Measure resistance between terminal 5 of the sensor harness connector and terminal 76 of ECM connector.
Specification : Approx. below 1Ω
Is the measured resistance within specifications ?
YES
▶ Go to "Component Inspection" procedure.
NO
▶ Check for open in the ground harness.
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
