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 communication circuit inspection" procedure.

IG KEY OFF

Connect PCM, ESP, Cluster connector.

Measure registance between terminal 3 and 11 of diagnostic connector.

Is the measured resistance within specification ?

	▶ Check EPS(MDPS), and ESP(VDC) connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure. ▶ Go to next procedure.
	▶ Check for open/short in harness. ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

IG KEY OFF

Disconnect PCM, TCM and ESP(VDC) connector.

IG KEY ON

Measure voltage between CAN high terminal(# 3) of diagnostic connector and chassis ground.

Measure voltage between CAN low terminal(#11) of diagnostic connector and chassis ground.

IG KEY OFF.

Disconnect PCM, TCM and ESP(VDC) connector.

Measure resistnace between CAN high terminal (# 3) of diagnostic connector and chassis ground.

Measure resistance between CAN low terminal (# 11) of diagnostic connector and chassis ground.

Is the measured resistance within specification ?

	▶ Check PCM, TCM and ESP(VDC) connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
	▶ Check short to battery in communication line. And then, go to 'Verification of Vehicle Repair" procedure. ▶ Check short to ground in communication line. And then, go to 'Verification of Vehicle Repair" procedure.