Inspection procedure O-1: The interior lamps (room ramp, rear parsonal 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, rear personal lamp. luggage compartment lamp, door lamp, key cylinder illumination lamp) in accordance with the input signals below.

Ignition switch (IG1)
Door switches
Tailgate switch
Door key switch
Tailgate key switch
Driver’s door lock actuator
Interior lamp switch
Multi-purpose fuse No.18
Key reminder switch <vehicles with keyless entry system>
Interior lamp loaded signal <vehicles with keyless entry system>

If this function does not work normally, these input signal circuit(s) or the ETACS-ECU may be defective.

POSSIBLE CAUSES

Malfunction of the door switches
Malfunction of the room lamp switches
Malfunction of the driver’s door lock actuator
Malfunction of the ETACS-ECU
Malfunction of the key reminder switch
Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Check the power supply circuit.

When the ignition switch is turned to the LOCK (OFF) position, check if the hazard warning lamps illuminate.

Q. Is the check result normal?

	Go to Step 2.

	Refer to inspection procedure A-2 "Check the ETACS-ECU battery power supply circuit ."

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 rear 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?

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

	No lamps illuminate at all. : Replace the ETACS-ECU.

	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. : Refer to inspection procedure P-20 "The interior lamp "all on" or "all off" switch signal is not sent to the ETACS-ECU ."

	If the interior lamp switches are turned to the ON position, none of the room lamp and the rear personal lamps illuminate at all. : Go to Step 3.

	The room lamp and the rear personal lamps do not illuminate or extinguish normally when the switches are at the DOOR position. : Go to Step 5.

	Only the room lamp does not illuminate or extinguish normally. : Refer to inspection procedure O-2 "The room lamp does not illuminate normally ."

	Only right or left rear personal lamp does not illuminate or extinguish normally. : Refer to inspection procedure O-3 "The rear personal lamp does not illuminate normally ."

	Only the luggage compartment lamp does not illuminate or extinguish normally. : Refer to inspection procedure O-4 "The luggage compartment lamp does not illuminate normally ."

	Only the door lamps do not illuminate or extinguish normally. : Refer to Inspection procedure O-5 "Door lamps do not illuminate/go out normally ."

	Only the key cylinder illumination lamp does not illuminate or extinguish normally. : Refer to inspection procedure J-1 "The ignition key cylinder illumination lamp does not illuminate/extinguish normally ."