INSPECTION PROCEDURE O-2: The front and rear room lamp do not illuminate or extinguish normally. <Vehicles with keyless entry system>

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

The ETACS-ECU operates this function in accordance with the input signals below.

Ignition switch (IG1)

Key reminder switch

All of the door switches

Driver's door lock actuator

Interior lamp loaded signal

If this function does not work normally, these input signal circuit(s), the interior lamp automatic shutdown function or the ETACS-ECU may be defective. The delay-off setting of this function can be changed by the adjustment function (default setting; 15 seconds).

POSSIBLE CAUSES

Malfunction of the key reminder switch

Malfunction of the door switches

Malfunction of the driver's door lock actuator

Malfunction of the ETACS-ECU

Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the adjustment function.

Check that the room lamp delay-off time has been set to other than "0 second" by the adjustment function.

Q: Is the check result normal?

YES: Go to Step 2

.
NO: Use the adjustment function to set the room lamp delay-off time to other than "0 second" (Refer to GROUP 54B - Adjustment function

Step 2. 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.

Ignition switch: OFF

ECU TO BE CHECKED

ETACS ECU

OK: "OK" is displayed on the "ETACS ECU" menu.

Q: Is the check result normal?

YES: Go to Step 3

.
NO: Refer to Inspection Procedure A-3 "Communication with ETACS-ECU is not possible

Step 3. SWS monitor data list

Check the input signals below, which are related to the front and rear room lamps.

<Selected item> ETACS ECU

Ignition switch: OFF

Item No.	Item name	Normal condition
Item 30	IG SW(IG1)	OFF

OK: Normal condition is displayed.

Q: Is the check result normal?

YES: Go to Step 4

.
NO: Refer to Inspection Procedure P-2 "The ignition switch (IG1) signal is not received

Step 4. Pulse check

Check the input signals below, which are related to the front or rear room lamps.

System switch	Check condition
Key reminder switch	When the inserted ignition key is pulled out
All of the door switches	A door is opened when all the doors are closed
Driver's door lock actuator switch	When the driver's door is unlocked or locked
Interior lamp loaded signal	When a load is applied through multi-purpose fuse No.22

OK: The MUT-II/III sounds or the voltmeter needle fluctuates.

Q: Is the check result normal?

All the signals are received normally.: Go to Step 5

.
The key reminder switch signal is not received.: Refer to Inspection Procedure P-12 "The key reminder switch signal is not received

."
All the door switch signals are not received.: Refer to Inspection Procedure P-4 "All the door switch signals are not received <LH drive vehicles>

." Refer to Inspection Procedure P-4 "All the door switch signals are not received <RH drive vehicles>

."
The driver's door lock actuator switch signal is not received.: Refer to Inspection Procedure P-15 "The driver's door lock actuator switch signal is not received <LH drive vehicles>

." Refer to Inspection Procedure P-15 "The driver's door lock actuator switch signal is not received <RH drive vehicles>

."
The interior lamp loaded signal is not received.: Refer to Inspection Procedure P-18 "The interior lamp loaded signal is not detected

Step 5. Connector check: D-05 front room lamp connector, D-11 rear room lamp connector

Q: Is the check result normal?

YES: Go to Step 6

.
NO: Repair the defective connector.

Step 6. Check the bulbs of the front and rear room lamps.

Check the bulbs of the front and rear room lamps.

Q: Is the check result normal?

YES: Go to Step 7

.
NO: Replace the front or rear room lamp bulb.

Step 7. Connector check: C-217 ETACS-ECU connector