Driver Assistance System (DTC/Circuit Diagnosis)

1. Turn ignition switch OFF.
2. Disconnect warning system switch connector.
3. Turn ignition switch ON.
4. Check voltage between warning system switch harness connector and ground.

   Terminals			Voltage (Approx.)
   (+)		(-)
   Warning system switch		Ground
   Connector	Terminal
   M126	5		Battery voltage

Is the inspection result normal?

YES

GO TO 2.

NO

Repair the warning systems ON indicator power supply circuit.

1. Turn ignition switch OFF.
2. Disconnect the ADAS control unit harness connector.
3. Check continuity between the ADAS control unit harness connector and warning system switch harness connector.

Is the inspection result normal?

YES

GO TO 3.

NO

Repair the harnesses or connectors.

Check continuity between the ADAS control unit harness connector and ground.

Is the inspection result normal?

YES

GO TO 4.

NO

Repair the harnesses or connectors.

Check the warning systems ON indicator. Refer to Component Inspection .

Is the inspection result normal?

YES

Replace the ADAS control unit. Refer to Removal and Installation .

NO

Replace warning system switch. Refer to Removal and Installation .