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 "W/Harness Inspection" procedure
Check for open in harness
Ignition "OFF"
Disconnect ECM connector and multi-function switch
Measure resistance between ECM headlamp switch signal line and Multi-function switch
※ Measure voltage of ECM when there is open circuit between ECM and headlamp multifunction switch : will be about 3.67V
Specification :Approx. 0 Ω
Is the measured resistance within specification?
YES
Check the condition of connected part and go to "Verification Vehicle Repair" procedure.
NO
Check for open circuit in harness between ECM and headlamp switch signal line.
Repair as necessary and go to "Verification Vehicle Repair" procedure.