INSPECTION PROCEDURE N-4: The luggage compartment lamp does not illuminate normally.


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


COMMENTS ON TROUBLE SYMPTOM
If the luggage compartment lamp does not turn on and off normally, wiring harness connector(s) or the bulb may be defective.

POSSIBLE CAUSES

  • Malfunction of the luggage compartment lamp bulbs
  • Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. SWS monitor data list.
<Selected item> ETACS ECU
  • Driver’s door: open
Item No.
 Item name
 Normal condition
Item 32
 DR DOOR SW
 ON
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 2.
Refer to inspection procedure P-4 "The driver’s door switch signal is not received ."

Step 2. ETACS switch data by using the SWS monitor
Check the ETACS-ECU signal related to the rear personal lamp illumination.

  • Ignition switch: OFF (key inserted)
Item No.
 Item name
 Normal condition
Item 03
 KEY REMINSW
 OFF

  • Passenger’s door: Close → Open
Item No.
 Item name
 Normal condition
Item 05
 PASS DOOR SW
 from OFF to ON

  • Rear door (RH): Close → Open
Item No.
 Item name
 Normal condition
Item 41
 R.DOOR(RH) SW
 from OFF to ON

  • Rear door (LH): Close → Open
Item No.
 Item name
 Normal condition
Item 42
 R.DOOR(LH) SW
 from OFF to ON

  • Driver’s door: Unlock → Lock
Item No.
 Item name
 Normal condition
Item 21
 DR DOR LOK SW
 from OFF to ON
Item 22
 DR DOR ULOK SW
 from ON to OFF

  • Room lamp on switch: ON
Item No.
 Item name
 Normal condition
Item 31
 RM LMP ON SW
 ON

  • Room lamp off switch: ON
Item No.
 Item name
 Normal condition
Item 31
 RM LMP OFF SW
 ON
OK: Normal conditions displayed for all the items.

Q. Is the check result normal?
Normal conditions are displayed for all the items. : Go to Step 3.
Normal condition is not displayed for item No.03 : Refer to inspection procedure P-10 "The key reminder switch signal is not received ."
Normal condition is not displayed for item No.05, 41 or 42 : Refer to inspection procedure P-12 "All the door switch signals are not received ."
Normal condition is not displayed for item No.21 and 32 : Refer to inspection procedure P-13 "The driver’s door lock actuator switch signal is not received ."
Normal condition is not displayed for item No.31 or 42 : Refer to inspection procedure P-18 "The interior lamp switch "all on" or "all off" switch signal is not sent to the ETACS-ECU ."

Step 3. Pulse check
Check the input signals below, which are related to the luggage compertment lamp.
System switch
 Check condition
Tailgate switch
 Tailgate is opened while all the other doors are closed
OK: The M.U.T.-III sounds or the voltmeter needle fluctuates.

Q. Is the check result normal?
Go to Step 4.
Refer to inspection procedure P-12 "All the door switch signals are not received."

Step 4. Connector check: G-12 luggage compartment lamp connector

Q. Is the check result normal?

Go to Step 5.

Repair the defective connector.

Step 5. Check the bulbs of the luggage compartment lamp.
Check that the luggage compartment lamp bulbs are not burned out.

Q. Is the check result normal?
Go to Step 6.
Replace the luggage compartment lamp bulb.

Step 6. Connector check: C-221 ETACS-ECU connector

Q. Is the check result normal?

Go to Step 7.

Repair the defective connector.

Step 7. Check the wiring harness from C-221 ETACS-ECU connector terminal No.52 to G-12 luggage compartment lamp connector terminal No.2.




note Prior to the wiring harness inspection, check intermediate connector C-16, G-14, and repair if necessary.

  • Check the earth wires for open circuit.

Q. Is the check result normal?

Go to Step 8.

Repair the wiring harness.

Step 8. Connector check: C-219 ETACS-ECU connector

Q. Is the check result normal?

Go to Step 9.

Repair the defective connector.

Step 9. Check the wiring harness from C-219 ETACS-ECU connector terminal No.6 to G-12 luggage compartment lamp connector terminal No.1.




note Prior to the wiring harness inspection, check intermediate connector G-14, junction block connector C-210, and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?

Go to Step 10.

Repair the wiring harness.

Step 10. Retest the system.
Check that the luggage compartment lamps illuminate and extinguish normally.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the luggage compartment lamp.