Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CHECK BCI OFF SWITCH SIGNAL INPUT
   
   
   1. Turn the ignition switch ON.
   2. Check voltage between ADAS control unit harness connector and ground.

   Terminals			Condition	Voltage (Approx.)
   (+)		(-)
   ADAS control unit		Ground	BCI OFF switch
   Connector	Terminal
   B104	10		Pressed	0 V
   			Released	12 V

   Is the inspection result normal?

   YES 

   Replace the ADAS control unit. Refer to REMOVAL AND INSTALLATION .

   NO 

   GO TO STEP 2  .

2. CHECK BCI OFF SWITCH
   
   
   1. Turn ignition switch OFF.
   2. Remove BCI OFF switch.
   3. Check BCI OFF switch. Refer to COMPONENT INSPECTION .

   Is the inspection result normal?

   YES 

   GO TO STEP 3  .

   NO 

   Replace the BCI OFF switch.

3. CHECK BCI OFF SWITCH GROUND CIRCUIT
   
   

   Check continuity between BCI OFF switch harness connector terminal and the ground.

   BCI OFF switch		Ground	Continuity
   Connector	Terminal
   M27	2		Yes

   Is the inspection result normal?

   YES 

   GO TO STEP 4  .

   NO 

   Repair harness or connector.

4. CHECK BCI OFF SWITCH SIGNAL INPUT CIRCUIT FOR OPEN
   
   
   1. Disconnect the ADAS control unit connector.
   2. Check continuity between the ADAS control unit harness connector and BCI OFF switch harness connector.

      ADAS control unit		BCI OFF switch		Continuity
      Connector	Terminal	Connector	Terminal
      B104	10	M27	6	Yes

   Is the inspection result normal?

   YES 

   GO TO STEP 5  .

   NO 

   Repair the harnesses or connectors.

5. CHECK BCI OFF SWITCH SIGNAL INPUT CIRCUIT FOR SHORT
   
   

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

   ADAS control unit		Ground	Continuity
   Connector	Terminal
   B104	10		No

   Is the inspection result normal?

   YES 

   Replace the ADAS control unit. Refer to REMOVAL AND INSTALLATION .

   NO 

   Repair the harnesses or connectors.