Inspection Procedure 2: The system cannot be activated or deactivated when you operate the sonar switch.


COMMENTS ON TROUBLE SYMPTOM


When the system cannot be activated or deactivated by operating the sonar switch, the sonar switch or the clearance warning control unit may have a problem.
note Diagnosis code C2225 may be set.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Check of short to earth, and open circuit in CSW line between the clearance warning control unit connector and sonar 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 S- line between the sonar 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 sonar switch.


Refer to .

Q. Is the check result normal?

Go to Step 4.

Replace the sonar switch (Refer to ).

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


Check the input signal (Refer to ).

Item No.
 Item name
 Normal condition
77
 Corner sensor SW 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 ).