| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Vehicle Exterior | Section: Lighting (ext) | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000002T2J007X |
| Title: LIGHTING (EXT): LIGHTING SYSTEM: WIRING DIAGRAM (2008 LX570) | ||
|
Room Light Control does not Operate |
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no LIN communication malfunctions before troubleshooting this symptom.
PROCEDURE
|
1. |
CHECK CONDITION |
(a) Check the malfunction conditions.
Result
|
Result |
Proceed to |
|---|---|
|
All conditions below |
A |
|
Engine switch on (ACC) or on (IG) → Engine switch off |
B |
|
All doors opened → a door closed |
C |
|
All doors locked → a door unlocked |
D |
|
|
2. |
CONFIRM LIGHT POSITION |
(a) Check the malfunctioning dome light.
Result
|
Result |
Proceed to |
|---|---|
|
Room No. 1 light does not operate |
A |
|
Room No. 3 light does not operate |
B |
|
Map light does not operate |
C |
|
|
3. |
CHECK HARNESS AND CONNECTOR (MAP LIGHT - BATTERY) |
|
(a) Disconnect the R7 light connector. |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R7-27 (+B3) - Body ground |
Always |
11 to 14 V |
|
|
4. |
CHECK HARNESS AND CONNECTOR (MAP LIGHT - ROOM NO. 1 LIGHT) |
|
(a) Disconnect the R7 and R12 map light connectors. |
(b) Disconnect the light connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R7-11 (ILLB) - 7 (B) |
Always |
Below 1 Ω |
|
R12-18 (RILL) - 8 (CTY) |
||
|
R7-11 (ILLB) - Body ground |
Always |
10 kΩ or higher |
|
R12-18 (RILL) - Body ground |
|
|
5. |
CHECK ROOM NO. 1 LIGHT (OPERATION) |
(a) Temporarily replace the room No. 1 light with a new or normally functioning one.
w/ Rear Seat Entertainment System
w/o Rear Seat Entertainment System
(b) Check the room No. 1 light operation.
OK:
Room No. 1 light operation is normal.
Result
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (w/ Rear Seat Entertainment System) |
B |
|
NG (w/o Rear Seat Entertainment System) |
C |
|
|
6. |
CHECK HARNESS AND CONNECTOR (MAP LIGHT - BATTERY) |
|
|
(a) Disconnect the R7 light connector. Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
|
7. |
CHECK HARNESS AND CONNECTOR (ROOM NO. 3 LIGHT - MAP LIGHT AND BODY GROUND) |
(a) Disconnect the R7 and R12 map light connectors.
(b) Disconnect the R6 light connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R7-10 (+B1) - R6-1 (DB) |
Always |
Below 1 Ω |
|
R12-14 (RRVT) - R6-3 (DL) |
||
|
R6-2 (L) - Body ground |
||
|
R7-10 (+B1) - Body ground |
Always |
10 kΩ or higher |
|
R12-14 (RRVT) - Body ground |
|
|
8. |
CHECK ROOM NO. 3 LIGHT (OPERATION) |
(a) Temporarily replace the room No. 3 light with a new or normally functioning one
.
(b) Check the room No. 3 light operation.
OK:
Room No. 3 light operation is normal.
|
|
|