Inspection Procedure 3: The Personal 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 personal lamps do not illuminate or extinguish normally, wiring harness connector(s) or the bulb may be defective.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Pulse check


Check the input signals below, which are related to the personal lamps.
System switch
 Check condition
Driver’s door switch
 Driver’s door is opened while all the other doors are closed.
Passenger’s door switch
 Passenger’s door is opened while all the other doors are closed.
Rear door (RH) switch
 Rear door (RH) is opened while all the other doors are closed
Rear door (LH) switch
 Rear door (LH) door is opened while all the other doors are closed
Back door switch
 Back door is opened while all the other doors are closed
Driver’s door lock actuator switch (unlock switch)
 When the driver’s door is unlocked or locked
Interior lamp ON switch
 When turned from OFF to ON
Interior lamp OFF switch
 When turned from ON to OFF
OK: The M.U.T.-III sounds or the voltmeter needle fluctuates.

Q. Is the check result normal?

YES (All the signals are received normally) : Go to Step 2.

NO (All the door switch signals are not received) : Refer to ETACS - Input Signal Chart .

NO (The driver’s door lock actuator switch (unlock switch) signal is not received) : Refer to ETACS - Input Signal Chart .

NO (The interior lamp switch signal is not received) : Refer to ETACS - Input Signal Chart .

STEP 2. Retest the system.


Check which lamp does not illuminate when the lamp switches are operated.

Q. Which lamp does not illuminate?

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

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

NO (One of the personal lamp (RH or LH) does not illuminate normally) : Go to Step 7.

STEP 3. Check the personal lamp switches.


Check which position (ON or DOOR) of the personal lamp switch does not activate the relevant lamp.

Q. Which switch position does not activate the lamp?

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

NO (The lamp does not illuminates at neither the ON nor DOOR position) : Go to Step 4.

NO (The lamp does not illuminate at the DOOR position) : Go to Step 6.

NO (The lamp does not illuminate at the ON position) : Replace the personal lamp.

STEP 4. Connector check: D-419 ETACS-ECU connector and E-104 personal lamp (RH) connector


Q. Is the check result normal?

Go to Step 5.

Repair the defective connector.

STEP 5. Check the wiring harness from D-419 ETACS-ECU connector terminal No.6 to E-104 personal lamp (RH) connector terminal No.2.


note Prior to the wiring harness inspection, check intermediate connector D-130, E-128, joint connector D-34 and junction block connector D-410, and repair if necessary.

Q. Is the check result normal?

Replace the personal lamp.

Repair the wiring harness.

STEP 6. Check the wiring harness from D-419 ETACS-ECU connector terminal No.5 to E-104 personal lamp (RH) connector terminal No.3.


note Prior to the wiring harness inspection, check intermediate connector D-130, E-128, joint connector D-34 and junction block connector D-410, and repair if necessary.

Q. Is the check result normal?

Replace the personal lamp.

Repair the wiring harness.

STEP 7. Connector check: E-104 personal lamp (RH) connector or E-109 personal lamp (LH) connector


Q. Is the check result normal?

Go to Step 8.

Repair the defective connector.

STEP 8. Check the bulbs of the personal lamp.


Check that the personal lamp bulbs are not burned out.

Q. Is the check result normal?

Go to Step 9

Replace the personal lamp bulb.

STEP 9. Check the personal lamp switches.


Check which switch position (ON or DOOR) does not activate the personal lamp.

Q. Which switch position does not activate the lamp?

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

NO (The lamp does not illuminates at neither the ON nor DOOR position) : Go to Step 10.

NO (The lamp does not illuminate at the ON position) : Go to Step 11.

NO (The lamp does not illuminate at the DOOR position) : Go to Step 13.

STEP 10. Check the wiring harness from D-419 ETACS-ECU connector terminal No.6 to E-104 personal lamp (RH) connector terminal No.2 or E-109 personal lamp (LH) connector terminal No.2.


note Prior to the wiring harness inspection, check intermediate connector D-130, E-128, joint connector D-34 and junction block connector D-410, and repair if necessary.

Q. Is the check result normal?

Replace the personal lamp.

Repair the wiring harness.

STEP 11. Connector check: E-102 room lamp connector


Q. Is the check result normal?

Go to Step 12.

Repair the defective connector.

STEP 12. Check the wiring harness from E-102 room lamp connector terminal No.9 to E-104 personal lamp (RH) connector terminal No.1 or E-109 personal lamp (LH) connector terminal No.1.


note Prior to the wiring harness inspection, check intermediate connector E-128 and repair if necessary.

Q. Is the check result normal?

Replace the personal lamp.

Repair the wiring harness.

STEP 13. Check the wiring harness from D-419 ETACS-ECU connector terminal No.5 to E-104 personal lamp (RH) connector terminal No.3 or E-109 personal lamp (LH) connector terminal No.3.


note Prior to the wiring harness inspection, check intermediate connector D-130, E-128, joint connector D-34 and junction block connector D-410, and repair if necessary.

Q. Is the check result normal?

Replace the personal lamp.

Repair the wiring harness.