B2621

STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: B2621: Communication Interruption
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 it is connected to the network by outputting a specified signal (periodic signal) to the communication bus on a regular schedule. 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 for DTCs of the CAN communication system Service Precautions.

Result





B -- GO TO CAN COMMUNICATION SYSTEM Service Precautions
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 CONTROL ECU AND SWITCH LH (DRIVER SEAT ECU) Removal
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) Removal

OK -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Removal