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?

	▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
	▶ Go to "CAN communication circuit inspection" procedure.

Ignition "OFF"

Disconnect AFLS-ECU connector and ABS/TCS/ESP ECU connector.

Measure the resistance between CAN-HIGH terminal of AFLS-ECU harness connector and CAN-HIGH terminal of ABS/TCS/ESP ECU harness connector.

Measure the resistance between CAN-LOW terminal of AFLS-ECU harness connector and CAN-LOW terminal of ABS/TCS/ESP ECU harness connector.

Is the measured resistance within specification ?

	▶ Substitute with a known - good ECU((AFLS ECU or ABS/TCS/ESP ) and check for proper operation. If the problem is corrected, replace ECU and go to "Verification of Vehicle Repair" procedure.
	▶ Check for open/short in harness. ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.