Inspection Procedure 5: A screen is not switched when the vehicle speed reaches a predetermined value.


COMMENT ON TROUBLE SYMPTOM


The camera-ECU switches the monitor screen according to a vehicle speed signal. If it is not switched, the vehicle speed signal system may be defective.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics


Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?

Go to Step 2.

Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting).

STEP 2. M.U.T.-III data list.


Using the camera-ECU service data.

Item No.
 M.U.T.-III display
 Check condition
 Normal condition
4
 Vehicle speed information
 Running
 Enable

Q. Is the check result normal?

Go to Step 4.

Go to Step 3.

STEP 3. M.U.T.-III other system diagnosis code


Check if a vehicle speed signal-related diagnosis code is set in the ETACS-ECU.

Q. Is the diagnosis code set?

Diagnose the ETACS-ECU.

Go to Step 4.

STEP 4. Retest the system.


Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction).

Replace the camera-ECU (Refer to ).