| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Audio/Visual/Telematics | Section: Navigation/Multi Info Display | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM0000011EZ03KX |
| Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: DESCRIPTION (2008 LX570) | ||
|
Illumination Circuit |
DESCRIPTION
Power is supplied to the display and navigation module display, radio receiver and steering pad switch illumination when the light control switch is in the TAIL or HEAD position.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the Precaution in the Supplemental Restraint System
.
PROCEDURE
|
1. |
CHECK ILLUMINATION |
(a) Check if the illumination for the display and navigation module display, steering pad switch, glove box light, cigarette lighter, or other parts (seat heater switch, front seat memory switch, etc.) comes on when the light control switch is turned to the HEAD or TAIL position.
Result
|
Result |
Proceed to |
|---|---|
|
Illumination comes on for all components except steering pad switch. |
A |
|
Illumination comes on for all components except radio receiver. |
B |
|
Illumination comes on for all components except display and navigation assembly. |
C |
|
No illumination comes on for all components. |
D |
|
|
2. |
CHECK HARNESS AND CONNECTOR (BATTERY - SPIRAL CABLE) |
(a) Disconnect the E12 cable connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E12-12 (IL+2) - Body ground |
Always |
11 to 14 V |
|
|
3. |
CHECK NO. 1 SWITCH WIRE |
(a) Disconnect the z35 cable connector.
(b) Disconnect the z51 steering pad switch connector.
(c) Measure the resistance according to the valve(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
z35-8 - z51-8 |
Always |
Below 1 Ω |
|
z35-5 - z51-1 |
Always |
Below 1 Ω |
|
z35-8 - Body ground |
Always |
10 kΩ or higher |
|
z35-5 - Body ground |
Always |
10 kΩ or higher |
|
|
4. |
CHECK STEERING PAD (STEERING PAD SWITCH) |
(a) Disconnect the z51 steering pad switch connector.
(b) Connect the positive (+) lead to terminal 1 (IL+2) and the negative (-) lead to terminal 8 (EAU) of the steering pad switch connector.
(c) Check if the illumination for the steering pad switch comes on.
OK:
Illumination for the steering pad switch comes on.
|
|
5. |
INSPECT SPIRAL CABLE |
(a) Disconnect the cable connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Spiral Cable Position |
Specified Condition |
|---|---|---|
|
E12-12 (IL+2) - z35-5 (IL+2) |
2.5 rotations to left |
Below 3 Ω |
|
Center |
||
|
2.5 rotations to right |
||
|
E12-4 (EAU) - z35-8 (EAU) |
2.5 rotations to left |
Below 3 Ω |
|
Center |
||
|
2.5 rotations to right |
NOTICE:
The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the Precaution for the supplemental restraint system
.
|
|
6. |
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - DISPLAY AND NAVIGATION MODULE DISPLAY AND RADIO RECEIVER) |
(a) Disconnect the E12 spiral cable connector.
(b) Disconnect the F1 and F23 receiver connectors.
(c) Disconnect the F28 display connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E12-12 (IL+2) - F1-2 (ILL+) |
Always |
Below 1 Ω |
|
E12-12 (IL+2) - F28-12 (ILL+) |
Always |
Below 1 Ω |
|
E12-4 (EAU) - F23-6 (SWG) |
Always |
Below 1 Ω |
|
E12-12 (IL+2) - Body ground |
Always |
10 kΩ or higher |
|
E12-4 (EAU) - Body ground |
Always |
10 kΩ or higher |
|
|
7. |
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMBINATION METER) |
|
(a) Disconnect the F1 receiver connector. |
(b) Disconnect the E77 meter connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F1-12 (ILL-) - E77-17 (ILL-) |
Always |
Below 1 Ω |
|
F1-12 (ILL-) - Body ground |
Always |
10 kΩ or higher |
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
F1-2 (ILL+) - Body ground |
Light control Switch TAIL or HEAD |
11 to 14 V |
|
|
8. |
CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - BATTERY AND COMBINATION METER) |
|
(a) Disconnect the F28 display connector. |
(b) Disconnect the E77 meter connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F28-5 (HILL) - E77-17 (ILL-) |
Always |
Below 1 Ω |
|
F28-5 (HILL) - Body ground |
Always |
10 kΩ or higher |
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
F28-12 (ILL+) - Body ground |
Light control switch TAIL or HEAD |
11 to 14 V |
|
|
|