5.
Measure voltage between terminal 2 of the relay harness connector and chassis ground.
Specification : Approx. B+
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 Glow relay.
Ignition "ON" & Engine "OFF".
Measure voltage between terminal 4 of the relay harness connector and chassis ground.
Measure voltage between terminal 2 of the relay harness connector and chassis ground.
Specification : Approx. B+
Is the measured voltage within specifications ?
YES
▶ Go to " Control Circuit Inspection" procedure.
NO
▶ Check for short to battery in power harness.
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Check for short to ground in harness.
Ignition "OFF" & Engine "OFF".
Disconnect Glow relay.
Measure resistance between terminal 3 of the glow relay connector and chassis ground.
Specification : Infinite
Is the measured resistance within specifications ?
YES
▶ Go to " Check for open in harness " as below
NO
▶ Check for short to ground in harness.
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Check for open in harness.
Ignition "OFF" & Engine "OFF".
Disconnect Glow relay.
Measure resistance between terminal 3 of the glow relay connector and terminal 18 of ECM harness connector.
Is the measured resistance within specifications ?
YES
▶ Go to " Component Inspection " procedure.
NO
▶ Check for open in control harness.
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
