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

Steering. Lexus Is250, Is220D. Gse20 Ale20
Steering Column. Lexus Is250, Is220D. Gse20 Ale20

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


HINT:
If the power voltage to the 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 ECU.

FAIL-SAFE OPERATION:
DTC No.
Detection Item
Fail-safe
B2602
Key Unlock Warning Switch Circuit Malfunction
Auto away function stops.
Auto return function:
  1. Continues (when the engine switch is on (IG))
  2. Stops (when the engine switch is off)
B2606
Key Code Confirm Signal Malfunction
Auto away or auto return function stops.
B2610
Tilt Position Sensor or Tilt Motor Circuit Malfunction
Tilt operation is suspended.
B2611
Telescopic Position Sensor or Telescopic Motor Circuit Malfunction
Telescopic operation is suspended.
B2620
ECU Power Source Circuit Malfunction
Tilt and telescopic operations is suspended.
B2624
Speed Signal Malfunction
Auto away and/or auto return function stops.
HINT:
If the communication of an ECU related to this system is interrupted, the ECU effects the controls listed below. (Example: When the windshield wiper switch assembly (combination switch ECU) is defective, manual operation is not available but the auto away / return and position memory functions can operate.)

Tilt and Telescopic Operation
Main Body ECU RH (Cowl Side J/B RH)
Front Power Seat Switch LH (Position Control ECU)
Windshield Wiper Switch Assembly (Combination Switch ECU)
Multiplex Communication Interruption
Manual
○
(Engine switch on (IG))
○
X
X
Auto away / return
X
○
○
X
Position memory
(Memorization) (*1)
X
X
○
X
Position memory
(Reproduction) (*1)
○
(Engine switch on (IG))
X
○
X
○: Operate
X: Not operate
*1: with Seat position memory