Diagnosis flow code: A

Step	Action	Yes	No
1	CAN communication circuit check Turn ignition switch to OFF position. Disconnect connector from ECM and ABS/ESP® control module. Check for proper terminal connection to CAN communication circuit at ECM and ABS/ESP® control module connectors. If OK, check CAN communication circuits between ECM connector and ABS/ESP® control module connector for breaking. Is each CAN communication circuit in good condition?	Go to Step 2.	Repair CAN communication circuit.
2	Power and ground circuit check of ECM Check ECM power and ground circuits. Is it in good condition?	Go to Step 3.	Repair power and/or ground circuit.
3	ECM CAN terminating resistance check Connect connector to ECM. Check CAN terminating resistance in ECM as follows. ESP® model: Measure Resistance between "E53-43" and "E53-44" terminal of ESP® control module connector. Non-ESP® model: Measure Resistance between "E03-10" and "E03-8" terminal of ABS control module connector. Is resistance 114 - 134 Ω?	Substitute a known-good ABS/ESP® control module and recheck.	Substitute a known-good ECM and recheck.