Inspection Procedure 4: Vehicle speed-dependent unfolding function does not work normally.


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM
If this function does not work normally, input signal circuit(s) of vehicle speed (combination meter) or the ETACS-ECU may be defective. Also, with a customization function, the door mirrors may be set to a mode in which the vehicle speed-dependent unfolding function is not activated.

PROBABLE CAUSES

  • Malfunction of combination meter
  • Malfunction of ETACS-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Check the ETACS customization function.
Use the ETACS customization function to confirm that "AUTO FOLD MIRROR" is set to "VEHICLE SPEED DEPENDENT OPEN".

Q. Is the check result normal?
Go to Step 2.
Use the ETACS customization function to set "AUTO FOLD MIRROR" to "VEHICLE SPEED DEPENDENT OPEN" (Refer to ).

STEP 2. M.U.T.-III data list
Check the combination meter- related input signals.

  • Drive the vehicle and change the vehicle speed.
Item No.
 Item name
 Normal condition
Item 80
 Speed meter
 Speedometer displayed value and M.U.T.-III displayed value agree with each other.

Q. Is the check result normal?
Go to Step 3.
Normal value is not displayed for item No. 80. : Perform the troubleshooting to the speedometer (Refer to GROUP 54A - Combination Meter, Inspection Procedure 5 "Speedometer does not work." Refer to .)

STEP 3. Retest the system.
Check that the vehicle speed-dependent unfolding function of the door mirrors works normally.

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)
Replace ETACS-ECU.