POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM FAIL-SAFE CHART

Tech Tips

If the power source voltage to the multiplex 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 sent to the multiplex tilt and telescopic ECU again.

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.
B2624 Speed Signal Malfunction The auto away/return function stops.
U0142 Lost Communication with Main Body ECU (multiplex network body ECU) The auto away/return function stops.

  1. 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 (Multiplex Network Body ECU) Communication Interruption
    Manual ○
    Auto away/return X

    Tech Tips

    ○: Operates

    X: Does not operate