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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 all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.

Has a problem been found?

YES

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

Go to "Power Circuit Inspection" procedure.

Disconnect EPS motor connector and engine start.

Measure voltage between terminal "2"of EPS motor harness connector and chassis ground.

Specification : 8V ± 0.5V

Is the voltage measured within specifications?

YES

Check for short to ground in power harness.

→ If it is normal, go to "Control Circuit Inspection" procedure.

→ If it is abnormal, repair as necessary and then go to "Verification of Vehicle Repair" procedure.

Measure voltage between terminal "2" of M41-3 (to EPS CM side) and chassis ground in above condition.

■ Specification : 8V ± 0.5V

→ If it is normal, check for short to ground in power harness.

→ If it is abnormal, substitute with a known-good EPS CM and check for proper operation.

If the problem is corrected, replace EPS EM and then go to "Verification of Vehicle Repair" procedure.

Check for open in ground harness. Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

Disconnect EPS motor connector and EPS CM connector.

Measure resistance between terminal "1" and "2" of EPS motor harness connector.

Specification : ∞

Is the resistance measured within specifications?

YES

Check for short to power in control harness.

→ If it is normal, go to "Component Inspection" procedure.

→ If it is abnormal, repair as necessary and then go to "Verification of Vehicle Repair" procedure.

Check for short between terminal "1" and "2" of EPS motor harness connector.

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