4401024

1.

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.

2.

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

3.

Has a problem been found?

YES

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

NO

Go to "Power Circuit Inspection" procedure.

1.

Check for open or short in harness

(1)

Ignition "OFF".

(2)

Disconnect multi-function switch connector.

(3)

Ignition "ON" & Engine "OFF".

(4)

Measure voltage between terminal 3 of the multi-function switch harness connector and chassis ground.

Specification : Approx. B+

(5)

Is the measured voltage within specifications ?

YES

▶ Go to "Signal Circuit Inspection" procedure.

NO

▶ Check for open or short to ground in power harness.

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

1.

Check for open or short in signal harness

(1)

Ignition "OFF" & Engine "OFF".

(2)

Disconnect Multi-function switch connector.

(3)

Measure resistance between terminal 1 of the multi-function switch harness connector and chassis ground.

Specification : Infinite

(4)

Is the measured resistance within specifications ?

YES

▶ Go to "Ground Circuit Inspection" procedure.

NO

▶ Check for open or short to ground in signal harness.

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

1.

Ignition "OFF".

2.

Disconnect Multi-function switch and ECM connector.

3.

Measure resistance between terminal 4 of the multi-function switch connector and terminal 74 of ECM harness connector.

Specification : Approx. below 1Ω

4.

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.