Inspection Procedure 1: The Interior Lamps (Room Lamp, Personal Lamps, Door Lamps, Luggage Compartment Lamp, Key Illumination Lamp) does not Illuminate or Extinguish Normally.


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




COMMENTS ON TROUBLE SYMPTOM


The ETACS-ECU operates the interior lamps (room lamp, personal lamps. luggage compartment lamp, door lamps, key cylinder illumination lamp) in accordance with the input signals below.

If this function does not work normally, these input signal circuit(s) or the ETACS-ECU may be defective. Alternatively, the room lamp delay off time has been set to 0 second by using the customisation function.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Customize function by using the SWS monitor


Use the SWS monitor customisation function to confirm that "Room lamp delay timer" is set to other than "Without function" (one of the settings below).

Q. Is the check result normal?

Go to Step 2.

Use the SWS monitor customisation function to confirm that "Room lamp delay timer" is set to other than "Without function" (Refer to ).

STEP 2. Check the illumination of the interior lamps.


Check that the interior lamps illuminate and extinguish.
note Check that the interior lamps illuminate or extinguish when the interior lamp switches are operated. For the room lamp and the personal lamps, check they illuminate when the lamp switches are turned to the ON or DOOR position.

Q. Which of the interior lamp does no illuminate or extinguish?

YES (All of the interior lamps illuminate and extinguish normally) : The procedure is complete.

NO (No lamps illuminate at all) : Go to Step 3.

NO (When the interior lamp switches are turned to the ON position, no lamps illuminate at all. Alternatively, when the interior lamp switches are turned to the OFF position, all the interior lamps illuminate) : Repair the interior lamps which do not turn on (Refer to trouble symptom chart ).

NO (If the interior lamp switches are turned to the ON position, none of the room lamp and the personal lamps illuminate at all) : Repair the interior lamps which do not turn on (Refer to trouble symptom chart ).

NO (The room lamp and the personal lamps do not illuminate or extinguish normally when the switches are at the DOOR position) : Repair the interior lamps which do not turn on (Refer to trouble symptom chart ).

NO (Only the room lamp does not illuminate or extinguish normally) : Repair the interior lamps which do not turn on (Refer to trouble symptom chart ).

NO (Only right or left personal lamp does not illuminate or extinguish normally) : Repair the interior lamps which do not turn on (Refer to trouble symptom chart ).

NO (Only the luggage compartment lamp does not illuminate or extinguish normally) : Repair the interior lamps which do not turn on (Refer to trouble symptom chart ).

NO (Only the door lamps do not illuminate or extinguish normally) : Repair the interior lamps which do not turn on (Refer to trouble symptom chart ).

NO (Only the key cylinder illumination lamp does not illuminate or extinguish normally) : Refer to Ignition Switch - inspection procedure "The ignition key cylinder illumination lamp does not illuminate/extinguish normally." .

STEP 3. ECU check by using the SWS monitor


Check that the power supply and earth lines to the ETACS-ECU and the SWS communication lines are normal.

ECUS TO BE CHECKED
OK: "OK" is displayed on the "ETACS ECU" menu.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

Refer to GROUP 54C - Trouble Symptom Chart .