Inspection Procedure I-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, the input signal circuit(s) below or the ETACS-ECU may be defective. Also, with a customisation function, the door mirrors may be set to a mode in which the vehicle speed-dependent unfolding function is not activated.

  • Ignition switch (IG1)
  • Vehicle speed signal (combination meter)

POSSIBLE CAUSES

  • Defective vehicle speed signal (combination meter)
  • The CAN bus line is defective.
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Pulse check
Check the input signals below which are related to the electric retractable remote controlled door mirror vehicle speed-dependent unfolding function.
System switch
 Check condition
Ignition switch (IG1)
 When turned from ACC to ON
Vehicle speed signal
 When the vehicle speed has reached 10 km/h or more.
OK: The M.U.T.-III sounds or the voltmeter needle fluctuates.

Q. Is the check result normal?
All the signals are received normally. : Go to Step 2.
The ignition switch (IG1) signal is not received. : Refer to Inspection Procedure P-2 "The ignition switch (IG1) signal is not received ."
The vehicle speed signal is not received. : Refer to Inspection Procedure P-22 "The vehicle speed signal is not received ."

Step 2. Customize function by using the SWS monitor
Use the SWS monitor customisation function to confirm that "DOOR MIRROR" is set to "SPEED SEN FUN".
caution The SWS monitor must be used in order to confirm and change that setting. Use the SWS monitor to confirm and/or change the customized function.

Q. Is the check result normal?
Go to Step 3.
Use the SWS monitor customisation function to set "DOOR MIRROR" to "SPEED SEN FUN" (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?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.