7959791

Many malfunctions in the electrical system are caused by poor connection. 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?

Connect all of control module(BCM, CLU, SJB, SMK, PSM ) connector.

Ignition "ON" , ENG "OFF"

Set-up the oscilloscope as mentioned below.

Measure signal waveform of B-CAN-HIGH terminal of SMK Module connector and chassis ground.

Measure signal waveform of B-CAN-LOW terminal of SMK Module connector and chassis ground.

Specification : Refer to Figure below

Fig 1) Diagnostic Trouble Code(DTC) is shown above

Is the measured signal waveform normal?

▶ Check BCM, CLU, SJB, SMK, PSM and Each Module 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.

▶ If the measured value is battery voltage, check short to battery in CAN line. Repair or replace as necessary. And then, go to "Verification of Vehicle Repair" procedure. In case that Communication is in sleep mode, 12V will be measured. Therefore, check that communication is in Wake up status.

▶ If 0V is detected, Check short to ground, short between CAN high and low each other or open in CAN high or CAN low harness. Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.

	▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
	▶ Perform following procedures.