DTC B1273 Sliding Roof ECU Communication Stop |
for Preparation Click here
DESCRIPTION
This DTC is output when LIN communication between the sliding roof drive gear sub-assembly and main body ECU (driver side junction block) stops for 10 seconds or more.DTC Code | DTC Detection Condition | Trouble Area |
B1273 | No communication between sliding roof drive gear sub-assembly and main body ECU (driver side junction block) for 10 seconds or more |
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WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- When using the Techstream with the ignition 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 tester and vehicle begins.
- HINT:
- DTC B2325 is also output when communication between the sliding roof drive gear and main body ECU (driver side junction block) stops.
1.CLEAR DTC |
Clear the DTC (Click here).
NEXT | |
2.CHECK FOR DTC |
Check for DTCs (Click here).
Result Result Proceed to DTC B1273 output reoccurs A DTC B1273 output does not reoccur B
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A | |
3.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SLIDING ROOF DRIVE GEAR) |
Disconnect the J2 main body ECU (driver side junction block) connector.
Disconnect the W3 sliding roof drive gear sub-assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition J2-10 (LIN2) - W3-3 (SPD) Always Below 1 Ω J2-10 (LIN2) or W3-3 (SPD) - Body ground Always 10 kΩ or higher
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OK | |
4.CHECK HARNESS AND CONNECTOR (SLIDING ROOF DRIVE GEAR - BATTERY AND BODY GROUND) |
Disconnect the W3 sliding roof drive gear sub-assembly connector.
Measure the resistance and voltage according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition W3-8 (E) - Body ground Always Below 1 Ω
- Standard Voltage:
Tester Connection Switch Condition Specified Condition W3-9 (IG) - Body ground Ignition switch ON 11 to 14 V W3-10 (B) - Body ground Always 11 to 14 V
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OK | |
5.REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY |
Temporarily replace the sliding roof drive gear sub-assembly with a new or normally functioning one (Click here).
Clear the DTC (Click here).
NEXT | |
6.CHECK FOR DTC |
Check for DTCs (Click here).
Result: Result Proceed to DTC B1273 output does not reoccur A DTC B1273 output reoccurs B
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A | ||
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