Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CHECK BRAKE SWITCH FUNCTION
   
   
   1. Turn ignition switch ON.
   2. Select "BRAKE SW1" and "BRAKE SW2" in DATA MONITOR mode of INTELLIGENT KEY with CONSULT.
   3. Check "BRAKE SW1" and "BRAKE SW2" indication under the following conditions.

      Monitor item	Condition		Indication
      BRAKE SW1	Brake pedal	Depressed	OFF
      		Released	ON
      BRAKE SW2	Brake pedal	Depressed	ON
      		Released	OFF

   Is the inspection result normal?

   YES 

   Refer to INTERMITTENT INCIDENT .

   NO-1 

   If BRAKE SW1 is incorrect. GO TO 2.

   NO-2 

   If BRAKE SW2 is incorrect. GO TO 3.

2. CHECK STOP LAMP SWITCH INPUT SIGNAL 1
   
   
   1. Turn ignition switch OFF.
   2. Disconnect BCM connector.
   3. Check voltage between BCM harness connector and ground.

      (+)		(-)	Voltage (V)
      BCM
      Connector	Terminal
      M18	25	Ground	Battery voltage

   Is the inspection normal?

   YES 

   GO TO STEP 7  .

   NO-1 

   Check 10 A fuse [No. 10, located in the fuse block (J/B)].

   NO-2 

   Check harness for open or short between BCM and fuse.

3. CHECK STOP LAMP SWITCH INPUT SIGNAL 2
   
   
   1. Disconnect BCM connector M18.
   2. Check voltage between BCM harness connector and ground.

      (+)		(-)	Condition		Voltage (V)
      BCM
      Connector	Terminal
      M18	27	Ground	Brake pedal	Depressed	Battery voltage
      				Not depressed	0

   Is the inspecting result normal?

   YES 

   GO TO STEP 7  .

   NO 

   GO TO STEP 4  .

4. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
   
   
   1. Disconnect stop lamp switch connector.
   2. Check voltage between stop lamp switch harness connector and ground.

      (+)		(-)	Voltage (V)
      Stop lamp switch
      Connector	Terminal
      E38	1	Ground	Battery voltage

   Is the inspection result normal?

   YES 

   GO TO STEP 5  .

   NO 

   Check harness for open or short between stop lamp switch and fuse.

5. CHECK STOP LAMP SWITCH CIRCUIT
   
   
   1. Check continuity between stop lamp switch harness connector and BCM harness connector.

      Stop lamp switch		BCM		Continuity
      Connector	Terminal	Connector	Terminal
      E38	2	M18	27	Yes

   2. Check continuity between stop lamp switch harness connector and ground.

      Stop lamp switch		Ground	Continuity
      Connector	Terminal
      E38	2		No

   Is the inspection result normal?

   YES 

   GO TO STEP 6  .

   NO 

   Repair or replace harness.

6. CHECK STOP LAMP SWITCH
   
   

   Refer to COMPONENT INSPECTION .

   Is the inspection result normal?

   YES 

   GO TO STEP 9  .

   NO 

   Replace stop lamp switch. Refer to EXPLODED VIEW .

7. CONNECTOR INSPECTION
   
   

   Check BCM connectors and terminals for deformation, disconnection, looseness or damage.

   Is the inspection result normal?

   YES 

   GO TO STEP 8  .

   NO 

   Repair or replace as necessary.

8. REPLACE BCM
   
   
   1. Replace BCM. Refer to REMOVAL AND INSTALLATION .
   2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT.

   Inspection End.

9. CHECK INTERMITTENT INCIDENT
   
   

   Refer to INTERMITTENT INCIDENT .

   Inspection End.