Inspection Procedure 14: The coming home light function does not work normally.


caution Whenever the ECU is replaced, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

COMMENTS ON TROUBLE SYMPTOM


When the coming home light function does not operate normally, the keyless entry system or the ETACS-ECU may have a problem. Or, the coming home light function may have been set to disabled using the customisation function.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. ETACS-ECU customise function check.
Check that any one of the followings other than "Disabled" is set for "Coming home light" with a customisation function.

  • 15 sec
  • 30 sec
  • 60 sec
  • 180 sec

Q. Is it set to other than "Disabled"?
Go to Step 2.
Set "Coming home light" to any one other than "Disabled" with a customise function (Refer to ).

STEP 2. M.U.T.-III diagnosis code.
Check if diagnosis code is set to the ETACS-ECU.

Q. Is the diagnosis code set?
Troubleshoot the ETACS-ECU.
Go to Step 3.

STEP 3. M.U.T.-III data list.
Using the ETACS-ECU service data, check the ignition switch signal.

  • Turn the ignition switch to the LOCK (OFF) position.
Item No.
 Item name
 Normal condition
30
 Ignition switch(IG1)
 OFF
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 4.
Troubleshoot the ETACS-ECU. Refer to Inspection Procedure 2 "The ignition switch (IG1) signal is not received".

STEP 4. Check the headlamps.
When the lighting switch is operated, check that the headlamps illuminate/go off normally.

Q. Is the check result normal?
Go to Step 5.
Troubleshoot the headlamps. Refer to trouble symptom chart.

STEP 5. Retest the system.
The coming home light function should work normally.

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 ETACS-ECU.