Terminal and Connector Inspection
1.

Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

2.

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

3.

Has a problem been found?

YES

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

NO

▶ Go to "Power Supply Circuit Inspection" procedure.

Power Supply Circuit Inspection
1.

Remove the main relay.

2.

Ignition "ON" & Engine "OFF".

3.

Measure the voltage between terminal 2 of the main relay harness connector(E07) and chassis ground.

4.

Measure the voltage between terminal 5 of the main relay harness connector(E07) and chassis ground.

Specification : Approx. B+

5.

Is voltage within the specification?

YES

▶ Go to "Control Circuit Inspection"

NO

▶ Check for an open or short to ground in the power supply circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection
1.

Check for short to ground in control circuit.

(1)

Ignition "OFF".

(2)

Disconnect Relay harness connector.

(3)

Measure resistance between terminal 4 of the relay harness connector and chassis ground.

Specification : Infinite

(4)

Is resistance within the specification?

YES

▶ Go to next step as below.

NO

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

2.

Check for short to power in control circuit.

(1)

Ignition "OFF".

(2)

Disconnect relay and ECM connectors.

(3)

Ignition "ON" and Engine "OFF".

(4)

Measure voltage between terminal 4 of the relay harness connector and chassis ground.

Specification : Approx 0V

(5)

Is voltage within the specification?

YES

▶ Go to next step as below

NO

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

3.

Check for open in control harness.

(1)

Ignition "OFF".

(2)

Disconnect relay and ECM connectors.

(3)

Measure resistance between terminals 4 of the relay harness connector and 23 of the ECM harness connector.

Specification : Approx 0Ω

(4)

Is resistance within the specification?

YES

▶ Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure

NO

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

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