B1273

SLIDING ROOF: SLIDING ROOF SYSTEM: B1273: Sliding Roof ECU Communication Stop
B1273 - Sliding Roof ECU Communication Stop

DESCRIPTION

This DTC is stored when LIN communication between the sliding roof drive gear sub-assembly (sliding roof ECU) and main body ECU (instrument panel junction block) stops for 10 seconds or more.





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 Techstream and vehicle begins.
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT
DTC B2325 is stored when the communication between the sliding roof ECU and main body ECU (instrument panel junction block) stops.

PROCEDURE

1. CHECK DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





B -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (SLIDING ROOF DRIVE GEAR - BATTERY, IG1 RELAY AND BODY GROUND)

(a) Disconnect the J3 sliding roof drive gear sub-assembly connector.





(b) Measure the resistance and voltage according to the value(s) in the tables below.

Standard Resistance:





Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SLIDING ROOF DRIVE GEAR)

(a) Disconnect the C45 main body ECU connector.

(b) Disconnect the J3 sliding roof drive gear sub-assembly connector.

(c) Measure the resistance according to the value(s) in the tables below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU)

(a) Temporarily replace the sliding roof drive gear sub-assembly with a new or normally functioning one Disassembly (from 10/2010).

NEXT -- Continue to next step.

5. CHECK DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





B -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

A -- END (SLIDING ROOF ECU IS DEFECTIVE)