4.
Measure voltage between terminal 1 of the EGR solenoid valve 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 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.
Check for short to ground in control harness
Ignition "OFF" & Engine "OFF".
Disconnect EGR solenoid valve connector.
Measure resistance between terminal 2 of the EGR solenoid valve harness 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 control harness
Ignition "OFF" & Engine "OFF".
Disconnected EGR solenoid valve and ECM connector.
Measure resistance between terminal 2 of the EGR solenoid valve harness connector and terminal 16 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.
