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 all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.

Has a problem been found?

	▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Charging System Inspection" procedure.

Engine "ON"

headight and heatwire "ON".

Measure voltage between terminal (+) and (-) of battery maintaining ENG. RPM at 2,500RPM(idle) over 2 minutes.

Is the measured voltage within specifications?

	▶ Go to "Power Circuit Inspection" procedure.
	▶ Check that the tension of drive velt, ENG RPM, fuse, terminal of battery, all terminals of alternator are in good condition and Check for damaged harness and poor connection between alternator and battery. ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

Ignition "OFF"

Disconnect EPB ECU connector.

Engine "ON", headight and heatwire "ON".

Measure voltage between battery power terminal of EPB ECU harness connector and chassis ground maintaining ENG. RPM at 2,500RPM(idle) over 2 minutes.

Is the measured voltage within specifications?

	▶ Go to "Ground Circuit Inspection" procedure.
	▶ Check for open or blown fuse referring to "Circuit Diagram". ▶ Repair open or short in power circuit between battery and EPB ECU harness connector and then go to "Verification of vehicle Repair" procedure.

Ignition "OFF".

Disconnect EPB ECU connector.

Measure resistance between ground terminal of EPB ECU harness connector and chassis ground.

Is the measured resistance within specifications?

	▶ Perform actuation by GDS and check whether it is operating correctly.
	▶ Check for open or contact resistance in ground harness. ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.