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Inspection Procedure 14: The welcome light function does not work normally.
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
TECHNICAL DESCRIPTION (COMMENT)
When the welcome light function does not operate normally, the keyless entry system or the ETACS-ECU may have a problem. Or, the welcome light function may have been set to disabled using the customization function.
 
 
TROUBLESHOOTING HINTS
  • The keyless entry system may be defective
  • The ETACS-ECU may be defective
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), Check the customization function.
Check that any one of the followings other than "Disabled" is set for "Welcome light" with a customization function.
  • Small light
  • Head light
Is it set to other than "Disabled"?
Go to Step 2.
Set "Welcome light" to any one other than "Disabled" with a customization function (Refer to ).
 
STEP 2. Using scan tool (M.U.T.-IIISE), read the ETACS DTC.
Check if DTC is set in the ETACS-ECU.
Is the DTC set?
Troubleshoot the ETACS-ECU. Refer to .
Go to Step 3.
 
STEP 3. Check the keyless entry system operation.
Check that the keyless entry system operation normally.
Is the check result normal?
Go to Step 4.
Troubleshoot the keyless entry system. Refer to GROUP 42B - Troubleshooting .
 
STEP 4. Check the taillights and headlights.
When the lighting switch is operated, check that the taillights and headlights illuminate/go off normally.
Is the check result normal?
Go to Step 5.
Troubleshoot the taillights and headlights. Refer to trouble symptom chart .
 
STEP 5. Retest the system.
The welcome light should work normally.
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.