5.
Measure voltage between terminal 5 of the main relay harness connector and chassis ground.
Specification : 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 Main Relay.
Ignition "ON" & Engine "OFF".
Measure voltage between terminal 2 of the main relay harness connector and chassis ground.
Measure voltage between terminal 5 of the main relay harness connector and chassis ground.
Specification : B+
Is the measured voltage within specifications ?
YES
▶ Go to "Control Circuit Inspection" procedure.
NO
▶ Check for open or short in the power harness.
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Check for short to ground in harness.
Ignition "OFF".
Disconnect Main relay.
Measure resistance between terminal 4 of the Main relay harness connector and chassis ground.
Specification : Infinite
Is the measured resistance within specifications ?
YES
▶ Go to "Check for short to battery 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 short to battery in harness.
Ignition "OFF".
Disconnect Main relay.
Ignition "ON" & Engine "OFF".
Measure voltage between terminal 4 of the Main relay harness connector and chassis ground.
Specification : Approx. below 1V
Is the measured voltage 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".
Disconnected MAF sensor connector and ECM connector.
Measure resistance between terminal 4 of the Main relay harness connector and terminal 13 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.
