Home Steering Steering Column POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM
Last Modified: 11-27-2007 1.6 U
Service Category: Steering Section: Steering Column
Model Year: 2008 Model: LX570 Doc ID: RM000000XZL013X
Title: STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: FAIL-SAFE CHART (2008 LX570)

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

B2602

Key Unlock Warning Switch Circuit Malfunction

The auto away function stops.

The auto return function:

  • Continues (when the engine switch is on (IG)).
  • Stops (when the engine switch is off).

B2603

Tilt and Telescopic Manual Switch Circuit Malfunction

The tilt and telescopic operation by the manual switch is suspended.

B2606

Key Code Confirm Signal Malfunction

The auto away or auto return function stops.

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 and/or auto return function stops.

1. FAIL-SAFE FUNCTION

(a) 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 tilt and telescopic ECU stops the operation of the power tilt and power telescopic steering column system.

(b) 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.

(c) If the tilt and telescopic 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.

(d) If the communication of an ECU that is related to the power tilt and power telescopic steering column system is interrupted, the tilt and telescopic ECU cannot control the functions listed below.

Tilt and Telescopic Operation

Main Body ECU Communication Interruption

Front Power Seat Switch LH (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

(Reproduction)

○*2

X

X

HINT:

  • ○ : Operates

    X : Does not operate

  • *1: All ECUs that are related to the power tilt and power telescopic steering column system.
  • *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.