Power Tilt And Power Telescopic Steering Column System Fail-Safe Chart

  1. FAIL-SAFE FUNCTION

Power Tilt And Power Telescopic Steering Column System -- Fail-Safe Chart


HINT:
If the power source voltage to the tilt and telescopic ECU returns to normal within 10 seconds during tilt or telescopic operation, the operation will be resumed. If it returns to normal after 10 seconds have elapsed, the operation restarts when a tilt or telescopic operation signal is again input to the tilt and telescopic ECU.

Fail-safe Operation
DTC Code
Detection Item
Fail-safe Operation
B2603
Tilt and Telescopic Switch Circuit Malfunction
The tilt and telescopic operation using the switch is suspended.
B2610
Tilt Position Sensor or Tilt Motor Circuit Malfunction
The tilt operation is suspended.
B2611
Telescopic Position Sensor or Telescopic Motor Circuit Malfunction
The telescopic operation is suspended.
B2620
ECU Power Source Circuit Malfunction
The tilt and telescopic operation is suspended.
B2621
Communication Interruption
The tilt and telescopic operation is limited depending on which ECU has lost communication. For details, refer to Fail-safe Function.
B2624
Speed Signal Malfunction
The auto away and/or auto return function stops.

FAIL-SAFE FUNCTION

  1. If a malfunction in the tilt position sensor signal or telescopic position sensor signal occurs while operating the power tilt or power telescopic function, the multiplex tilt and telescopic ECU stops the operation of the power tilt and power telescopic steering column system.

  2. If the power source voltage to the ECU drops below approximately 8 V while operating the power tilt or power telescopic function, the ECU stops the operation of the power tilt and power telescopic steering column system.

  3. If the ECU detects that the motor has locked during the operation of the power tilt or power telescopic function, the ECU stops the operation of the power tilt and power telescopic steering column system.

  4. If the communication of an ECU that is related to the power tilt and power telescopic steering column system is interrupted, the control of functions by the multiplex tilt and telescopic ECU is limited as shown in the table below.


Tilt and Telescopic Operation
Main Body ECU Communication Interruption
Front Power Seat Switch (Position Control ECU) Communication Interruption
All ECUs*1 Communication Interruption
Manual
○*2
○
X*2
Auto away/return
X
○
X
Position memory (Memorization)
X
X
X
Position memory (Recall)
X
X
X
HINT:
  1. ○: Operates
    X: Does not operate
  2. *1: All ECUs that are related to the power tilt and power telescopic steering column system.
  3. *2: The operation is permitted if the engine switch is on (IG) while the signal from the main body ECU is interrupted. The operation is prohibited if the engine switch is off while the signal from the main body ECU is interrupted.