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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 ?

	▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
	▶ Go to "CAN Signal Circuit Inspection" procedure.

Measure resistance between CAN LOW terminal, CAN HIGH terminal of the EPS ECU harness connector and chassis ground.

Specification : ∞ Ω

Is the measured value within specifications?

▶ Go to next procedure.

▶ If abnormal resistance is detected in CAN HIGH circuit, Repair short to ground in CAN HIGH circuit and then go to "Verification of vehicle Repair" procedure.

▶ If abnormal resistance is detected in CAN LOW circuit, Repair short to ground in CAN LOW circuit and then go to "Verification of vehicle Repair" procedure.

Measure resistance between CAN LOW terminal and CAN HIGH terminal of the EPS ECU harness connector.

Specification : Approx. 120Ω

Is the measured value within specifications?

▶ Go to "Component Inspection" procedure.

▶ In case of the resistance "approx. 1Ω" : Repair mutual short in CAN signal circuit of the EPS ECU and then go to "Verification of vehicle Repair" procedure.

▶ In case of the resistance "∞ Ω" : Repair open in CAN signal circuit of the EPS ECU and then go to "Verification of vehicle Repair" procedure.

▶ In case of the resistance "approx. 120 Ω" : Check the resistances(122Ω) in I/P junction box and PCM, repair as necessary and then go to "Verification of vehicle Repair" procedure.