Many malfunctions in the electrical system are caused by poor harness and terminal conditions. 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 "W/Harness Inspection" procedure.

IG "ON" & ENG "OFF"

After connect GDS, select "Oscilloscope" mode.

Measure signal waveform of CAN-High terminal of Data Link Connector and chassis ground.

Measure signal waveform of CAN-Low terminal of Data Link Connector and chassis ground.

Is the measrured signal waveform normal ?

▶ Go to next 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. ▶ Go to next procedure.

IG KEY OFF.

Disconnect PCM, TCCM, TCM, Steering Angle Sensor and ABS Module connector.

Measure resistance between terminal #3 of diagnostic terminal and CAN high terminal of each module.

Measure resistance between terminal #11 of diagnostic terminal and CAN low terminal of each module.

Is the measured value within specification ?

	▶ Go to next procedure.
	▶ Check open between 3, 11 terminal of diagnostic terminal and CAN communication line. Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.