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 " Power Circuit Inspection " procedure.

Ignition "OFF" & Engine "OFF".

Disconnect MAF and Acceleration pedal sensor connector.

Ignition "ON" & Engine "OFF".

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

Measure voltage between terminal 5 of the APS1 harness connector and chassis ground.

Specification : Approx. 4.8 ~ 5.1V

Is the measured voltage within specifications ?

YES

▶ Go to "Component Inspection" procedure.

NO

▶ Check for open or short to ground in harness.

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