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.
TROUBLESHOOTING HINTS
The camera-ECU may be defective
The CAN bus may be defective
The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-III), diagnose the CAN bus line.
Use the scan tool (M.U.T.-III) to diagnose the CAN bus lines.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).
STEP 2. Using scan tool (M.U.T.-III), check data list.
Using the camera-ECU data list.
Perform a test run of the vehicle.
Item No.
Scan tool (M.U.T.-III) display
Check condition
Normal condition
4
Vehicle speed information
Running
Enable
Item No.
Scan tool (M.U.T.-III) display
Check condition
Normal condition
4
Vehicle speed information
Running
Enable
Is the check result normal?
Go to Step 4.
Go to Step 3.
STEP 3. Using scan tool (M.U.T.-III), read the ETACS diagnostic trouble code.
Check if a vehicle speed signal-related DTC set in the ETACS-ECU.
Is the DTC set?
Diagnose the ETACS-ECU (Refer to ).
Go to Step 4.
STEP 4. Retest the system.
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 ).