3.
Has a problem been found?
YES
a.
Repair as necessary and go to "Verification Vehicle Repair" procedure.
NO
a.
Go to "Component Inspection" procedure.
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 connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
YES
Repair as necessary and go to "Verification Vehicle Repair" procedure.
NO
Go to "Component Inspection" procedure.
Ignition "ON" and Engine "OFF".
Connect scantool and select VEHICLE SCOPEMETER function.
Measure waveform between terminal "B13" of BCM ECU and chassis ground.
Specification : CAN communication waveform is displayed
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
Go to "Check CAN low communication circuit" procedure.
NO
Check for short circuit in signal harness. Repair as necessary and go to "Verification Vehicle Repair" procedure.
Ignition "ON" and Engine "OFF".
Connect scantool and select VEHICLE SCOPEMETER function.
Measure waveform between terminal "B12" of BCM ECU and chassis ground.
Specification : CAN communication waveform is displayed
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
Go to "Component Inspection" procedure.
NO
Check for short circuit in signal harness. Repair as necessary and go to "Verification Vehicle Repair" procedure.
