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 next procedure.

Ignition "OFF".

Make sure all control modules' connectors are properly connected.

Ignition "ON".

Measure waveform signal between C-CAN High terminal of data link connector and chassis ground with Oscilloscope.

Measure waveform signal between C-CAN Low terminal of data link connector and chassis ground with Oscilloscope.

Is measured value within specification?

	▶ Go to next procedure.
	▶ Repair open or short in CAN Communication line between BSD ECU(RH) and BSD ECU(LH) harness connector and then go to "Verification of vehicle Repair" procedure. ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

Ignition "OFF".

Disconnect Battery(-) terminal.

Disconnect BSD ECU(RH) connector and BSD ECU(LH) connector.

Measure the resistance between terminal of BSD ECU(RH) harness connector and terminal of BSD ECU(LH) harness connector.

Is the measured resistance within specifications?

▶ Check BSD ECU(RH <-> LH) 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. ▶ Substitute with a known-good BSD ECU LH or RH and check for proper operation. If the problem is corrected, replace BSD ECU LH or RH and then 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.