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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 451 (Power Tilt & Telescopic Steering Column - Diagnosis) >> Circuit Inspection >> DTC B2621 Communication Interruption >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

Power tilt and power telescopic ECU forms the network with ECU of other systems through 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. Power tilt and power telescopic ECU detects the connected condition of each ECU based on the signal.

DTC - B2621 TROUBLE DETECTION

DTC No. DTC Detecting Condition Trouble Area
B2621
  • Periodical signal from the specified ECU has stopped.
  • Periodical signals from the ECU have stopped.
  • Multiplex communication system
  • Power tilt and power telescopic ECU