Inspection Procedure 1: The blind spot warning switch signal is not received.


caution Whenever the ECU is replaced, ensure that the input signal circuit is normal.

COMMENTS ON TROUBLE SYMPTOM


If there is an error to the blind spot warning switch input signal, the blind spot warning switch signal is no longer output to the communication line.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III data list


Check the input signals from the blind spot warning switch.

Item No.
 Item name
 Normal condition
5
 BSW SW
 OFF to ON (only when switch is operated)
OK: Normal condition is displayed.

Q. Is the check result normal?

Go to Step 3.

Go to Step 2.

STEP 2. Check the wiring harness between blind spot warning switch connector and the gateway-ECU connector.



Q. Is the check result normal?

Go to Step 3.

Repair the connector(s) or wiring harness.

STEP 3. Check the wiring harness between blind spot warning switch connector and body earth.



Q. Is the check result normal?

Go to Step 4.

Repair the connector(s) or wiring harness.

STEP 4. Check the blind spot warning switch.


Refer to GROUP 54A - Blind spot warning switch, Blind spot warning switch inspection .

Q. Is the check result normal?

Go to Step 5.

Replace the blind spot warning switch (Refer to GROUP 54A - Blind spot warning switch ).

STEP 5. M.U.T.-III data list


Operate the blind spot warning switch.
Item No.
 Item name
 Normal condition
5
 BSW SW
 OFF to ON (only when switch is operated)
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 gateway-ECU (Refer to ).