DTC B1273 Sliding Roof ECU Communication Stop |
for Preparation Click here
DESCRIPTION
This DTC is output when LIN communication between the sliding roof ECU (sliding roof drive gear sub-assembly) and main body ECU (instrument panel junction block) stops for more than 10 seconds.DTC No. | DTC Detection Condition | Trouble Area |
B1273 | No communication between sliding roof ECU (Sliding roof drive gear sub-assembly) and main body ECU (Instrument panel junction block) for more than 10 seconds |
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WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- When using the intelligent tester with the ignition switch off to troubleshoot:
- Connect the intelligent tester to the vehicle, and turn the courtesy switch on and off at 1.5-second intervals until communication between the tester and vehicle begins.
1.CLEAR DTC |
Clear the DTC (Click here).
NEXT | |
2.CHECK DTC OUTPUT |
Recheck for DTC (Click here).
- Result:
Result Proceed to B1273 is output A B1273 is not output B
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A | |
3.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SLIDING ROOF ECU) |
Disconnect the E8 and Q12 connectors.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition E8-10 (LIN2) - Q12-4 (MPX1) Always Below 1 Ω E8-10 (LIN2) - Body ground Always 10 kΩ or higher
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection Condition Specified Condition E8-10 (LIN2) - Body ground Always Below 1 V
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OK | |
4.CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - BATTERY AND GROUND) |
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition Q12-2 (E) - Body ground Always Below 1 Ω
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection Condition Specified Condition Q12-1 (B) - Body ground Always 11 to 14 V
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OK | |
5.REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
Replace the sliding roof ECU (Sliding roof drive gear sub-assembly) (Click here).
NEXT | |
6.CHECK DTC OUTPUT |
Clear the DTC (Click here).
Recheck for DTC.
- Result:
Result Proceed to B1273 is not output A B1273 is output B
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A | ||
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