- Overhead junction block
- No. 2 body ECU
- Harness or connector
| Last Modified: 11-27-2007 | 1.6 C | |
| Service Category: Power Source/Network | Section: Networking | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000002TH4006X |
| Title: NETWORKING: LIN COMMUNICATION SYSTEM: DESCRIPTION (2008 LX570) | ||
|
DTC |
B2405 |
Sub Bus LIN Module Communication Malfunction |
DESCRIPTION
This DTC is stored when LIN communication between the No. 2 body ECU and overhead junction block stops for 10 seconds or more.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B2405 |
No communication between the No. 2 body ECU and overhead junction block for 10 seconds or more. |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When using the Techstream with the engine switch off to troubleshoot:
Connect the Techstream to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (NO. 2 BODY ECU - OVERHEAD JUNCTION BLOCK) |
|
(a) Disconnect the L33 ECU connector. |
(b) Disconnect the R12 junction block connector.
(c) Measure the resistance and voltage according to the value(s) in the tables below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L33-10 (MPX) - R12-2 (LIN) |
Always |
Below 1 Ω |
|
L33-10 (MPX) - Body ground |
Always |
10 kΩ or higher |
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L33-10 (MPX) - Body ground |
Always |
Below 1 V |
|
|
2. |
CHECK OVERHEAD JUNCTION BLOCK (BATTERY VOLTAGE AND GROUND) |
|
(a) Disconnect the R7 junction block connector. |
(b) Measure the resistance and voltage according to the value(s) in the tables below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R7-16 (GND9) - Body ground |
Always |
Below 1 Ω |
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R7-6 (+B2) - Body ground |
Always |
11 to 14 V |
|
|
3. |
CHECK OVERHEAD JUNCTION BLOCK |
(a) Temporarily replace the overhead junction block with a new or normally functioning one
.
(b) Clear the DTC
.
|
|
4. |
CHECK FOR DTC |
(a) Recheck for DTCs
.
Result
|
Result |
Proceed to |
|---|---|
|
DTC B2405 is not output |
A |
|
DTC B2405 is output |
B |
|
|
|