- An open or short in the GSW input circuit of the main body ECU (cowl side junction block LH).
- The collision door lock release function does not operate normally.
| Last Modified: 11-27-2007 | 1.6 C | |
| Service Category: Vehicle Interior | Section: Door Lock | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000001P8M00NX |
| Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: DESCRIPTION (2008 LX570) | ||
|
DTC |
B1243 |
GSW Terminal Circuit Malfunction |
DESCRIPTION
If the collision door lock release function does not operate normally, or an open or short in the GSW input circuit of the main body ECU is detected, DTC B1243 will be stored.
HINT:
If DTC B1243 is stored, the speed-sensitive automatic door lock function, shift-linked automatic door lock function, and collision door lock release function will be prohibited.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1243 |
When either of the following occurs: |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK DTC OUTPUT |
(a) Clear the DTCs
.
(b) Check for DTCs.
Result
|
Result |
Proceed to |
|---|---|
|
B1243 is output |
A |
|
B1243 is not output |
B |
|
|
2. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - CENTER AIRBAG SENSOR) |
(a) Disconnect the cable from the negative (-) battery terminal.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
w/ Navigation System:
NOTICE:
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.
(b) Disconnect the 2D ECU connector.
(c) Disconnect the E47 sensor connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2D-25 (GSW) - E47-18 (GSW) |
Always |
Below 1 Ω |
|
2D-25 (GSW) - Body ground |
Always |
10 kΩ or higher |
|
|
3. |
CHECK MAIN BODY ECU (GSW VOLTAGE) |
(a) Disconnect the cable from the negative (-) battery terminal.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
w/ Navigation System:
NOTICE:
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.
|
(b) Reconnect the 2D ECU connector. |
(c) Connect the cable to the negative (-) battery terminal.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
E47-18 (GSW) - Body ground |
Engine switch on (IG) |
4.5 to 5.5 V |
|
|
4. |
REPLACE CENTER AIRBAG SENSOR |
(a) Disconnect the cable from the negative (-) battery terminal.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
w/ Navigation System:
NOTICE:
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.
(b) Replace the center airbag sensor
.
|
|
5. |
CHECK DTC OUTPUT |
(a) Recheck for DTCs
.
Result
|
Result |
Proceed to |
|---|---|
|
B1243 is output |
A |
|
B1243 is not output |
B |
|
|
|