Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CHECK WARNING SYSTEMS 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	Warning systems switch
   Connector	Terminal
   B104	1		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 WARNING SYSTEMS SWITCH
   
   
   1. Turn ignition switch OFF.
   2. Remove warning systems switch.
   3. Check warning systems switch. Refer to COMPONENT INSPECTION .

   Is the inspection result normal?

   YES 

   GO TO STEP 3  .

   NO 

   Replace the warning systems switch. Refer to REMOVAL AND INSTALLATION .

3. CHECK WARNING SYSTEMS SWITCH GROUND CIRCUIT
   
   

   Check continuity between warning systems switch harness connector terminal and the ground.

   Warning systems switch		Ground	Continuity
   Connector	Terminal
   M126	8		Yes

   Is the inspection result normal?

   YES 

   GO TO STEP 4  .

   NO 

   Repair harness or connector.

4. CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT CIRCUIT FOR OPEN
   
   
   1. Disconnect the ADAS control unit connector.
   2. Check continuity between the ADAS control unit harness connector and warning systems switch harness connector.

      ADAS control unit		Warning systems switch		Continuity
      Connector	Terminal	Connector	Terminal
      B104	1	M126	6	Yes

   Is the inspection result normal?

   YES 

   GO TO STEP 5  .

   NO 

   Repair the harnesses or connectors.

5. CHECK WARNING SYSTEMS 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	1		No

   Is the inspection result normal?

   YES 

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

   NO 

   Repair the harnesses or connectors.