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 "Signal Circuit Inspection" procedure.
Check for short to battery in harness
Ignition "OFF".
Disconnect AP sensor connector.
Ignition "ON" & Engine "OFF".
Measure voltage between terminal 1 of the sensor harness connector and chassis ground
Specification : 4.8 ~ 5.1V
Is the measured voltage within specifications ?
YES
▶ Go to "Check for open in harness" as below.
NO
▶ Check for short to battery in harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Check for open in harness
Ignition "OFF"
Disconnect AP sensor connector
Measure resistance between terminal 1 of the sensor harness connector and terminal 80 of ECM harness connector.
Specification : Approx.below 1Ω
Is the measured resistance within specifications ?
YES
▶ Go to "Ground Circuit Inspection" procedure.
NO
▶ Check for open in harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Ignition "OFF".
Disconnect AP sensor connector.
Measure resistance between terminal 4 of the sensor harness connector and terminal 79 of ECM harness connector.
Specification : Approx.below 1Ω
Is the measured resistance within specifications ?
YES
▶ Go to "Component Inspection" procedure.
NO
▶ Check for open in harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
