| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Vehicle Interior | Section: Seat Belt | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM0000014DL01PX |
| Title: SEAT BELT: SEAT BELT WARNING SYSTEM: DESCRIPTION (2008 LX570) | ||
|
Front Passenger Side Seat Belt Warning Light Malfunction |
DESCRIPTION
The combination meter detects the state of the front seat inner belt RH when the front passenger seat is occupied with the engine switch on (IG). If the front passenger seat belt is not fastened, the front passenger side seat belt warning light on the display and navigation module display*1 (multi-display*2) blinks. If the seat belt is fastened, the warning light turns off.
HINT:
*1: w/ Navigation System
*2: w/o Navigation System
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Check for DTCs.
Result
|
Result |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
CAN communication system DTC is output |
B |
|
Airbag system DTC is output |
C |
|
Occupant classification system DTC is output |
D |
|
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Operate the Techstream according to the steps on the display and select "Active Test".
Combination Meter
|
Item |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Front Passenger Side Seat Belt |
Front passenger side seat belt warning light |
ON or OFF |
Confirm that the Vehicle is Stopped and Engine Idling |
OK:
Front passenger side seat belt warning light condition can be switched by Active Test
|
|
3. |
INSPECT FUSE (ECU-IG No. 1) |
(a) Disconnect the ECU-IG No. 1 fuse from the cowl side junction block RH.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
ECU-IG No. 1 fuse |
Always |
Below 1 Ω |
|
|
4. |
CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMBINATION METER, BATTERY AND BODY GROUND) |
|
(a) Disconnect the F28 display connector. |
(b) Disconnect the E77 ECU connector.
(c) Measure the resistance and voltage according to the value(s) in the tables below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F28-21 (PBEW) - E77-39 (WRNP) |
Always |
Below 1 Ω |
|
F28-10 (GND1) - Body ground |
||
|
F28-21 (PBEW) or E77-39 (WRNP) - Body ground |
Always |
10 kΩ or higher |
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
F28-3 (IG) - Body ground |
Engine switch on (IG) |
11 to 14 V |
|
|
5. |
CHECK DISPLAY AND NAVIGATION MODULE DISPLAY*1 (MULTI-DISPLAY*2) |
|
(a) Disconnect the F28 display connector. |
(b) Measure the voltage according to value(s) in the table below.
OK:
|
Measurement Connection |
Specified Condition |
|---|---|
|
Battery positive (+) → F28-3 (IG) Battery negative (-) → F28-21 (PBEW) Battery negative (-) → F28-10 (GND1) |
Front passenger side seat belt warning light on |
Result
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (w/ Navigation System) |
B |
|
NG (w/o Navigation System) |
C |
|
|
6. |
REPLACE FRONT SEAT INNER BELT ASSEMBLY RH |
(a) Temporarily replace the front seat inner belt RH with a new one
.
|
|
7. |
CHECK FRONT PASSENGER SIDE SEAT BELT WARNING LIGHT |
(a) Check the front passenger side seat belt warning light function
.
OK:
Front passenger side seat belt warning light operates normally.
|
|
|