Disconnect the Battery Sensor and PCM/ECM connectors and inspect for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Reconnect the connectors.

Connect the GDS and go to “Current Data”.

Monitor modules and PCM/ECM sensor values in Current Data, check and wiggle the harness(es), connector(s), and terminal(s).

Any change in the values indicates a poor connection. Was a connector problem found?

	▶ Repair the connector. Go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Signal Circuit Inspection" procedure.

IG "OFF"

Disconnect PCM/ECM harness connector

Measure resistance between High signal terminal and Low signal terminal of PCM/ECM harness connector.

Is the measured resistance within specification ?

	▶ Go to next step as below.
	▶ Check for open in wiring related to the CAN communication(PCM/ECM, EPS, MTS and vertical resistor at the junction box). Repair as necessary and then go to "Verification of Vehicle Repair" procedure. note Vertical Resistor Resistance : Approx. 110~130Ω

IG "OFF"

Disconnect PCM/ECM harness connector.

Measure resistance between High signal terminal of PCM/ECM harness connector and chassis ground.

Measure resistance between Low signal terminal of PCM/ECM harness connector and chassis ground.

Is the measured resistance within specification ?

	▶ Go to next step as below.
	▶ Repair CAN communication line for a short to ground. And then go to "Verification of Vehicle Repair" procedure.

IG "OFF"

Disconnect the connectors related to the CAN communication.

IG "ON".

Measure voltage between High signal terminal of PCM/ECM harness connector and chassis ground.

Measure voltage between Low signal terminal of PCM/ECM harness connector and chassis ground.

Is the measured resistance within specification ?

	▶ Go to next step as below.
	▶ Repair CAN communication line for a short to battery. And then go to "Verification of Vehicle Repair" procedure.