B1273

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1273: Sliding Roof ECU Communication Stop
B1273 - Sliding Roof ECU Communication Stop

DESCRIPTION

This DTC is detected when communication between the sliding roof drive gear (sliding roof control ECU) and network gateway ECU stops for more than 10 seconds.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK OPERATION

(a) Check that the tilt or slide switch can operate the sliding roof normally.

OK:

Tilt or slide switch can operate sliding roof normally.

OK -- REPLACE SLIDING ROOF DRIVE GEAR
NG -- Continue to next step.

2. CHECK WIRE HARNESS (SLIDING ROOF CONTROL ECU - BATTERY AND BODY GROUND)





(a) Disconnect the W7 drive gear connector.

(b) Measure the resistance and voltage of the wire harness side connector.

Standard resistance:

Standard voltage










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

3. CHECK RESISTANCE OF COMMUNICATION LINE





(a) Disconnect the W7 drive gear connector.

(b) Disconnect the W6 ECU connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY