B2621

STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: B2621: Communication Interruption

DTC B2621 - Communication Interruption

DESCRIPTION

The multiplex tilt and telescopic ECU forms a network with the ECUs of other systems through the communication bus. Each ECU informs the other ECUs that they are connected to the network by outputting a specified signal (periodical signal) to the communication bus at regular intervals. The multiplex tilt and telescopic ECU detects the connection of each ECU based on the signal.





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC (CAN COMMUNICATION SYSTEM)
(a) Check the DTC of the CAN communication system Diagnosis System.

Result





B -- GO TO CAN COMMUNICATION SYSTEM
A -- Continue to next step.

2. READ VALUE USING TECHSTREAM (MAIN BODY ECU COMMUNICATION SIGNAL)
(a) Use the Data List to check if the main body ECU communication signal is functioning properly.

Tilt & Telescopic





OK:
"OK" is displayed.

NG -- REPLACE MAIN BODY ECU
OK -- Continue to next step.

3. READ VALUE USING TECHSTREAM (FRONT POWER SEAT CONTROL ECU AND SWITCH LH COMMUNICATION SIGNAL)
(a) Use the Data List to check if the front power seat control ECU and switch LH communication signal is functioning properly.

Tilt & Telescopic





OK:
"OK" is displayed.

NG -- REPLACE FRONT POWER SEAT SWITCH LH (DRIVER SEAT ECU)
OK -- Continue to next step.

4. READ VALUE USING TECHSTREAM (COMBINATION METER ECU COMMUNICATION SIGNAL)
(a) Use the Data List to check if the combination meter ECU communication signal is functioning properly.

Tilt & Telescopic





OK:
"OK" is displayed.

NG -- REPLACE COMBINATION METER ASSEMBLY (COMBINATION METER ECU)
OK -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU