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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control System (Direct Adaptive Steering) >> Symptom Diagnosis >> System Symptom >> Symptom Table
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Symptom Table

Symptom Warning lamp Possible cause Diagnosis method Priority
While driving the vehicle, steering wheel is off-center. The vehicle does not pull to one direction. *1 ON Fail safe mode 2 For fail-safe mode, refer to Fail-safe  (Steering Force Control Module), Fail-safe  (Steering Angle Main Control Module), Fail-safe  (Steering Angle Sub Control Module). Perform self-diagnosis 1
OFF*3 Protection mode For protection function, refer to Protection Function  (Steering Force Control Module), Protection Function  (Steering Angle Main Control Module), Protection Function  (Steering Angle Sub Control Module). Perform self-diagnosis
NOTE: SYMBOL When DTC is detected as "PAST", this is control in normal condition.
 2
OFF Mistake of calibration procedure. Perform self-diagnosis When DTC is not detected, refer to Work Procedure . 2
The vehicle pulls to one direction. *2 OFF
  • Steering wheel is off-center slightly.
  • Steering wheel is off-center temporarily.
 Perform symptom diagnosis"THE VEHICLE PULLS TO ONE SIDE" Refer to Diagnosis Procedure."THE VEHICLE PULLS TO ONE SIDE" Refer to Diagnosis Procedure . 1
  • When turning the steering wheel from full left stop to full right stop, the sound is heard from left or right side.
  • When turning the steering wheel from full left stop to full right stop, it is not able to turn until halfway position of left or right.
 The vehicle pulls to one direction. *2 OFF
  • Steering wheel is off-center slightly.
  • Steering wheel is off-center temporarily.
 Perform symptom diagnosis"THE VEHICLE PULLS TO ONE SIDE" Refer to Diagnosis Procedure."THE VEHICLE PULLS TO ONE SIDE" Refer to Diagnosis Procedure . 1
The vehicle does not pull to one direction. *1 OFF The neutral position of the vehicle's alignment and the neutral position of the steering rack are off-center. Perform "TOE-IN ADJUSTMENT" with alignment tester. Refer to Inspection and Adjustment .
CAUTION:

Be sure to use alignment tester for the symptom.

 1
  • Steering gear ratio changes
  • Steering wheel turning force is heavy
 ON Fail safe mode 2 or 3 For fail-safe mode, refer to Fail-safe  (Steering Force Control Module), Fail-safe  (Steering Angle Main Control Module), Fail-safe  (Steering Angle Sub Control Module). Perform self-diagnosis 1
OFF*3 Protection mode For protection function, refer to Protection Function  (Steering Force Control Module), Protection Function  (Steering Angle Main Control Module), Protection Function  (Steering Angle Sub Control Module). Perform self-diagnosis
NOTE: SYMBOL When DTC is detected as "PAST", this is control in normal condition.
 2
OFF Steering mode is except "Normal". For steering mode, refer to System Description . Not required
NOTE: SYMBOL Since the steering mode is except "Normal", steering characteristic is changed. This is control in normal condition.
 3
Steering wheel turning force is light ON Fail safe mode 2 For fail-safe mode, refer to Fail-safe  (Steering Force Control Module), Fail-safe  (Steering Angle Main Control Module), Fail-safe  (Steering Angle Sub Control Module). Perform self-diagnosis 1
OFF*3 Protection mode For protection function, refer to Protection Function  (Steering Force Control Module), Protection Function  (Steering Angle Main Control Module), Protection Function  (Steering Angle Sub Control Module). Perform self-diagnosis
NOTE: SYMBOL When DTC is detected as "PAST", this is control in normal condition.
 2
OFF Steering mode is except "Normal". For steering mode, refer to System Description . Not required
NOTE: SYMBOL Since the steering mode is except "Normal", steering characteristic is changed. This is control in normal condition.
 3
Vibration / Noise occurs ON Fail safe mode 2 (Operation sound of steering clutch) For fail-safe mode, refer to Fail-safe  (Steering Force Control Module), Fail-safe  (Steering Angle Main Control Module), Fail-safe  (Steering Angle Sub Control Module). Perform self-diagnosis 1
OFF*3 Protection mode (Operation sound of steering clutch) For protection function, refer to Protection Function  (Steering Force Control Module), Protection Function  (Steering Angle Main Control Module), Protection Function  (Steering Angle Sub Control Module). Perform self-diagnosis
NOTE: SYMBOL When DTC is detected as "PAST", this is control in normal condition.
 2
OFF Operating sound of Steering force motor Not required
NOTE: SYMBOL This is an operating sound in normal condition of direct adaptive steering.
 3
OFF Operating sound of steering angle actuator
When start the engine, sound is heard. ON Malfunction of steering clutch (When sound is abnormal sound.) Perform self-diagnosis 1
OFF Operating sound of steering clutch Not required
NOTE: SYMBOL This is an operating sound in normal condition of direct adaptive steering.
Unbalance steering wheel turning force (torque variation) ON Fail safe mode 2 For fail-safe mode, refer to Fail-safe  (Steering Force Control Module), Fail-safe  (Steering Angle Main Control Module), Fail-safe  (Steering Angle Sub Control Module). Perform self-diagnosis 1
OFF*3 Protection mode For protection function, refer to Protection Function  (Steering Force Control Module), Protection Function  (Steering Angle Main Control Module), Protection Function  (Steering Angle Sub Control Module). Perform self-diagnosis
NOTE: SYMBOL When DTC is detected as "PAST", this is control in normal condition.
 2
When starting the engine ↔ placing the ignition switch OFF, steering wheel moves. OFF Starting the engine in the condition that steering angle is over 360 degree Not required
NOTE: SYMBOL The gear ration is different between direct adaptive steering mode and others. If steering angle is over 360 degree when engine starts, the system adjust it.
 2
ON Malfunction of steering clutch Perform self-diagnosis
NOTE: SYMBOL When starting the engine ↔ placing the ignition switch OFF, it is normal that the steering wheel slightly moves.
 1
When turning quickly, the vehicle follows slowly compared with turning normally. ON Fail safe mode 1 For fail-safe mode, refer to Fail-safe  (Steering Force Control Module), Fail-safe  (Steering Angle Main Control Module), Fail-safe  (Steering Angle Sub Control Module). Perform self-diagnosis
NOTE: SYMBOL After the system starts again, system is in fail-safe mode 3.
 1
When turning the steering wheel from full left stop to full right stop, steering reaction force is light. OFF The output of steering force motor decreases. Not required
NOTE: SYMBOL System decrease the output of steering force motor to avoid overheating steering force motor. This is control in normal condition of direct adaptive steering.
 1

*1: Even if driver releases the hands of the steering wheel, the vehicle keeps running straightly.

*2: If driver tries to drive straightly, the steering wheel pulls and then the reaction force to be returned to the center position is generated. If driver releases the hands of the steering wheel, the steering wheel is returned to the center position and the vehicle pulls to one direction.

*3: Except C13E5-00

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