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.
Check Power Supply
Ignition "ON" & Engine "OFF"
Disconnect EGR S/V connector.
Measure voltage between terminal "2" of EGR S/V harness connector and chassis ground.
Specification : B+
Is the measured voltage within specifications?
YES
▶ Go to "Control circuit inspection" procedure.
NO
▶ Repair or replace as necessary and then, go to " Verification of Vehicle Repair" procedure.
Check for open in harness
Ignition "OFF"
Disconnect EGR S/V connector and PCM connector.
Measure resistance between terminal "1" of EGR S/V harness connectors and 6 of the PCM harness connector.
Specification : Approx. below 1Ω
Is the measured resistance within specifications?
YES
▶ Go to "Check for short to ground" procedure.
NO
▶ Repair or replace as necessary. And then, go to "Verification of Vehicle Repair" procedure.
Check for short to ground in harness
Ignition "OFF"
Disconnect PCSV S/V connector.
Measure resistance between terminal "1" of EGR S/V harness connector and chassis ground.
Specification : Infinite
Is the measured resistance within specification ?
YES
▶ Go to "Component inspection" procedure.
NO
▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.
