POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM > FAIL-SAFE CHART
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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.
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*1 or
RH*2 (Position Control ECU)
Communication Interruption
All ECUs*3 Communication
Interruption
Manual ○*4 ○ X*4
Auto away/return X ○ X
Position memory (Memorization) X X X
Position memory (Reproduction) ○*4 X X
*1: for LHD
*2: for RHD
HINT:
○: Operates
X: Does not operate
*3: All ECUs that are related to the power tilt and power telescopic steering column system.
*4: 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.
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