B2621

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

DTC B2621 - Communication Interruption

DESCRIPTION

Multiplex tilt and telescopic ECU forms the network with ECU of other systems through the communication bus. Each ECU informs to other ECU of the connection of itself to the network by outputting the specified signal (periodical signal) onto the communication bus with every fixed period of time. Multiplex tilt and telescopic ECU detects the connected condition of each ECU based on the signal.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (MULTIPLEX TILT AND TELESCOPIC ECU - BODY ECU)
(a) Connect Techstream to DLC3.
(b) Turn the ignition switch to ON and push Techstream main switch ON.
(c) Select the item "Receive from Body" in the Data List.
(d) Check the signal communication state of the body ECU on the tester screen.
Standard:
"OK" is displayed.
NG -- REPLACE BODY ECU
OK -- Continue to next step.
2. READ VALUE USING TECHSTREAM (MULTIPLEX TILT AND TELESCOPIC ECU - POWER SEAT ECU)
(a) Connect Techstream to DLC3.
(b) Turn the ignition switch to ON and push Techstream main switch ON.
(c) Select the item "Receive from Seat ECU" in the Data List.
(d) Check the signal communication state of the power seat ECU on the tester screen.
Standard:
"OK" is displayed.
NG -- REPLACE POWER SEAT ECU
OK -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU