Inspection Procedure F-8: The daytime running lamp does not work normally (vehicles with daytime running lamp).


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

COMMENTS ON TROUBLE SYMPTOM


If the daytime running lamp does not work normally, the input signal circuits to the ignition switch (IG1) or the ETACS-ECU may be defective.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III diagnosis code.


Check that ETACS-ECU sets a diagnosis code.

Q. Is the diagnosis code set?

Refer to diagnosis code chart .

Go to Step 2.

STEP 2. M.U.T.-III data list


Check the input signal below which are related to the rear wiper.

Item No.
 Item name
 Normal condition
30
 Ignition Switch (IG1)
 ON
OK: Normal condition is displayed.

Q. Is the check result normal?

Go to Step 3.

Refer to inspection procedure J-3 "The ignition switch (IG1) signal is not received ."

STEP 3. M.U.T.-III actuator test


Perform the actuator test for the ETACS-ECU, and check that the daytime running lamp works normally.

Q. Is the check result normal?

Go to Step 4.

Diagnose the headlamps. Refer to trouble symptom chart .

STEP 4. Retest the system.


Check that the daytime running lamp works 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. Then perform the variant coding and write the VIN data (Refer to GROUP 00, Precautions Before Service - How to Perform Variant Coding ).