Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK WARNING BUZZER POWER SUPPLY CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect the warning buzzer connector.
   3. Turn ignition switch ON.
   4. Check voltage between the warning buzzer harness connector and ground.

      Terminals			Voltage (Approx.)
      (+)		(-)
      Warning buzzer		Ground
      Connector	Terminal
      M60	1		Battery voltage

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair the warning buzzer power supply circuit.

2. CHECK WARNING BUZZER GROUND CIRCUIT 
   1. Turn ignition switch OFF.
   2. Check continuity between the warning buzzer harness connector and ground.

      Warning buzzer		Ground	Continuity
      Connector	Terminal
      M60	3		Yes

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair the harnesses or connectors.

3. CHECK WARNING BUZZER SIGNAL CIRCUIT FOR OPEN 
   1. Disconnect the ADAS control unit connector.
   2. Check continuity between the ADAS control unit harness connector and warning buzzer harness connector.

      ADAS control unit		Warning buzzer		Continuity
      Connector	Terminal	Connector	Terminal
      B104	12	M60	2	Yes

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Repair the harnesses or connectors.

4. CHECK WARNING BUZZER SIGNAL CIRCUIT FOR SHORT 

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

   ADAS control unit		Ground	Continuity
   Connector	Terminal
   B104	12		No

   Is the inspection result normal? 

   YES: GO TO 5.

   NO: Repair the harnesses or connectors.

5. CHECK WARNING BUZZER OPERATION 
   1. Connect the warning buzzer connector.
   2. Turn ignition switch ON.
   3. Apply ground to warning buzzer terminal 2.
   4. Check condition of the warning buzzer.

      Does warning buzzer sound? 

      YES: Replace the ADAS control unit. Refer to "REMOVAL AND INSTALLATION ".

      NO: Replace the warning buzzer.