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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Brakes >> Brakes Control Systems >> Chassis Control >> Symptom Diagnosis >> Chassis Control System >> Symptom Table

Symptom Table

ACTIVE TRACE CONTROL SYSTEM SYMPTOMS 

Perform the "Self Diagnostic Result" using CONSULT before the symptom diagnosis. Perform the trouble diagnosis if any DTC is detected.

Symptom Possible cause Inspection item
Active trace control inoperative/ineffective No active trace control assist Active trace control selected OFF in the PERSONAL setting screen of the Infiniti drive mode selector. Change active trace control selection in the PERSONAL setting screen to ON.
VDC function is turned OFF. Turn the VDC function ON.
Brake system malfunction. Repair brake system malfunction.
Power train system malfunction. Repair power train system malfunction.
Certain roads, inclement weather or driving conditions. System is functioning normally. Confirm the condition with the customer.
Excessive lag on turns Wheel alignment. Repair alignment malfunction.
  • Road wheel tire condition is abnormal.
  • Road wheel tire size is abnormal.
Check the road wheel tire.
Certain roads, inclement weather or driving conditions. System is functioning normally. Confirm the condition with the customer.

ACTIVE ENGINE BRAKE SYSTEM SYMPTOMS 

Perform the "Self Diagnostic Result" using CONSULT before the symptom diagnosis. Perform the trouble diagnosis if any DTC is detected.

Symptom Possible cause Inspection item
Active engine brake control inoperative/ineffective No CVT gear ratio assist Active engine brake selected OFF in the PERSONAL setting screen of the Infiniti drive mode selector. Change active engine brake selection in the PERSONAL setting screen to ON.
VDC function is turned OFF. Turn the VDC function ON.
Brake system malfunction. Repair brake system malfunction.
Power train system malfunction. Repair power train system malfunction.
Certain roads, inclement weather or driving conditions. System is functioning normally. Confirm the condition with the customer.
Lower CVT gear ratio not achieved Wheel alignment. Repair alignment malfunction.
  • Road wheel tire condition is abnormal.
  • Road wheel tire size is abnormal.
Check the road wheel tire.
Certain roads, inclement weather or driving conditions. System is functioning normally. Confirm the condition with the customer.

ACTIVE RIDE CONTROL SYSTEM SYMPTOMS 

Perform the "Self Diagnostic Result" using CONSULT before the symptom diagnosis. Perform the trouble diagnosis if any DTC is detected.

Symptom Possible cause Inspection item
Active ride control inoperative/ineffective No active ride control assist VDC function is turned OFF. Turn the VDC function ON.
Brake system malfunction. Repair brake system malfunction.
Power train system malfunction. Repair power train system malfunction.
Bumpy ride on bumpy road
  • Road wheel tire condition is abnormal.
  • Road wheel tire size is abnormal.
Check the road wheel tire.
Certain roads, inclement weather or driving conditions. System is functioning normally. Confirm the condition with the customer.