- "AVN" is not displayed on "CAN Bus Check".
| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Power Source/Network | Section: Networking | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000002TGF00DX |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM: DESCRIPTION (2008 LX570) | ||
|
Display and Navigation Assembly Communication Stop Mode |
DESCRIPTION
|
Detection Item |
Symptom |
Trouble Area |
|---|---|---|
|
Display and Navigation Assembly Communication Stop Mode |
When either condition below is met:
|
|
*1: w/ Navigation System
*2: w/o Navigation System
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Operating the engine switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
PROCEDURE
|
1. |
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL |
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
-
w/ Navigation System:
After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
-
When disconnecting the cable, some systems need to be initialized after the cable is reconnected
.
|
|
2. |
CHECK FOR OPEN IN CAN BUS WIRE (DISPLAY AND NAVIGATION MODULE DISPLAY OR MULTI-DISPLAY BRANCH WIRE) |
|
(a) Disconnect the F28 display and navigation module display*1 or multi-display*2 connector. *1: w/ Navigation System *2: w/o Navigation System |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
F28-26 (CANH) - F28-25 (CANL) |
Engine switch off |
54 to 69 Ω |
|
|
3. |
CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY OR MULTI-DISPLAY - BATTERY AND BODY GROUND) |
(a) Connect the cable to the negative (-) battery terminal.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected
.
|
(b) Disconnect the F28 display and navigation module display*1 or multi-display*2 connector. *1: w/ Navigation System *2: w/o Navigation System |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F28-10 (GND1) - Body ground |
Always |
Below 1 Ω |
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
F28-1 (+B1) - Body ground |
Always |
11 to 14 V |
|
F28-2 (ACC) - Body ground |
Engine switch on (ACC) |
11 to 14 V |
|
F28-3 (IG) - Body ground |
Engine switch on (IG) |
11 to 14 V |
Result
|
Result |
Proceed to |
|---|---|
|
OK (w/ Navigation System) |
A |
|
OK (w/o Navigation System) |
B |
|
NG |
C |
|
|
|