Diagnosis Procedure
- CHECK BRAKE SWITCH FUNCTION
- Turn ignition switch ON.
- Select "BRAKE SW1" and "BRAKE SW2" in DATA MONITOR mode of INTELLIGENT KEY with CONSULT.
- 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
If BRAKE SW1 is incorrect. GO TO 2.
NO
If BRAKE SW2 is incorrect. GO TO 3.
- CHECK STOP LAMP SWITCH INPUT SIGNAL 1
- Turn ignition switch OFF.
- Disconnect BCM connector.
- 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 7.
NO
Check 10 A fuse [No. 10, located in the fuse block (J/B)].
NO
Check harness for open or short between BCM and fuse.
- CHECK STOP LAMP SWITCH INPUT SIGNAL 2
- Disconnect BCM connector M18.
- 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 7.
NO
GO TO 4.
- CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
- Disconnect stop lamp switch connector.
- 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 5.
NO
Check harness for open or short between stop lamp switch and fuse.
- CHECK STOP LAMP SWITCH CIRCUIT
- 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
- 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 6.
NO
Repair or replace harness.
- Check continuity between stop lamp switch harness connector and BCM harness connector.
- CHECK STOP LAMP SWITCH
Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO 9.
NO
Replace stop lamp switch. Refer to Exploded View .
- CONNECTOR INSPECTION
Check BCM connectors and terminals for deformation, disconnection, looseness or damage.
Is the inspection result normal?
YES
GO TO 8.
NO
Repair or replace as necessary.
- REPLACE BCM
- Replace BCM. Refer to Removal and Installation .
- Perform initialization of BCM and registration of all Intelligent Keys using CONSULT.
Inspection End.
- CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .
Inspection End.