Inspection Procedure 4: The system cannot be activated or deactivated when you operate the blind spot warning switch.


COMMENTS ON TROUBLE SYMPTOM


When the system cannot be activated or deactivated by operating the blind spot warning switch, the blind spot warning switch or the clearance warning control unit may have a problem.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Check of short to earth, and open circuit in BSW line between the clearance warning control unit connector and blind spot warning switch connector.


Q. Is the check result normal?

Go to Step 2.

Repair the connector(s) or wiring harness.

STEP 2. Check of open circuit in earth line between the blind spot warning switch connector and body earth.


Q. Is the check result normal?

Go to Step 3.

Repair the connector(s) or wiring harness.

STEP 3. Check the blind spot warning switch.


Refer to .

Q. Is the check result normal?

Go to Step 4.

Replace the blind spot warning switch (Refer to ).

STEP 4. M.U.T.-III data list.


Check the input signal (Refer to ).

Item No.
 Item name
 Normal condition
78
 BSW switch input signal
 When the switch is operated: ON
When the switch is not operated: OFF
OK: Normal condition is displayed.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Replace the clearance warning control unit (Refer to .)