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 EGR solenoid valve connector.

Ignition "ON" & Engine "OFF".

Measure voltage between terminal 1 of the EGR solenoid valve harness connector and chassis ground

Specification : Approx. B+

Is the measured voltage within specifications ?

YES

▶ Go to " Control Circuit Inspection " procedure.

NO

▶ Check for open or short in power harness.

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

Ignition "OFF" & Engine "OFF".

Disconnect EGR solenoid valve connector.

Measure voltage between terminal 2 of EGR solenoid valve harness connector and chassis ground.

Specification : Approx. below 1V

Is the measured voltage within specifications ?

YES

▶ Go to " Component Inspection" procedure

NO

▶ Check for short to battery in harness.

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