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 "Power Circuit Inspection" procedure.

Ignition "OFF" & Engine "OFF".

Disconnect VS sensor connector.

Ignition "ON" & Engine "OFF".

Measure voltage between terminal 1(A/T) or 2(M/T) of the VSS harness connector and chassis ground.

Specification : Approx. B+

Is the measured voltage within specifications ?

YES

▶ Go to "Signal Circuit Inspection" procedure.

NO

▶ Check for open or short in power harness.

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

Ignition "OFF" & Engine "OFF".

Disconnect VS sensor connector.

Measure voltage between terminal 3 of VSS harness connector and chassis ground

Specification : Approx. 12V

Is the measuered voltage within specifications ?

YES

▶ Go to "Ground Circuit Inspection" procedure.

NO

▶ Check for open or short to ground in harness.

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

Ignition "OFF" & Engine "OFF".

Disconnect VS sensor and ECM connector.

Measure resistance between terminal 2(A/T) or (M/T) of VSS harness connector and terminal 49 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.