W/Harness Inspection

Terminal and Connector Inspection

1. 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.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage.
3. Has a problem been found ?
YES
1) Repair as necessary and go to "Verification Vehicle Repair" procedure
NO
1) Go to "Component Inspection" procedure

Signal Circuit Inspection

Check CAN high communication circuit
1. Ignition "ON" and Engine "OFF"
2. Connect scantool and select VEHICLE SCOPEMETER function.
3. Measure waveform between terminal "BCM-IF-30" of IPM and chassis ground.
A. Specification : CAN communication waveform is displayed




4. Is the measured waveform within specifications ?
** The existance of CAN communication waveform itself shows there's no trouble in CAN communication circuit. If there's any short in harness, no signal is detected
YES
1) Go to "Check CAN low communication circuit" procedure.
NO
1) Check for short circuit in signal harness. Repair as necessary and go to "Verification Vehicle Repair" procedure.
Check CAN low communication circuit
1. Ignition "ON" and Engine "OFF"
2. Connect scantool and select VEHICLE SCOPEMETER function.
3. Measure waveform between terminal "BCM-IF-39" of BCM ECU and chassis ground.
A. Specification : CAN communication waveform is displayed




4. Is the measured waveform within specifications ?
** The existance of CAN communication waveform itself shows there's no trouble in CAN communication circuit. If there's any short in harness, no signal is detected
YES
1) Go to "Component Inspection" procedure.
NO
1) Check for short circuit in signal harness. Repair as necessary and go to "Verification Vehicle Repair" procedure.

Power Supply Circuit Inspection

Check for open or short in power harness
1. Ignition "OFF"
2. Connect FAM
3. Measure voltage value between terminal "BEC-FF-13" of FAM and chassis ground.
A. Specification : 9 - 16V




4. Is the measured voltage within specifications ?
YES
1) Go to "Component Inspection" procedure.
NO
1) Check for open or short in power harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.