Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

The dynamic driver assistance switch can be turned ON/OFF, but the DCA system does not operate.

NOTE: Never start the operation under the following conditions.

No operation condition

When the brake pedal depressed
When the ICC system is set
When the system judges that the vehicle comes to a standstill by the system control
When the vehicle ahead is not detected

Operation cancellation condition

When the dynamic driver assistance switch is turned to OFF
When the system malfunction occurs
When ABS or VDC (including the TCS) operates
When the VDC is turned OFF
When the sensor area of the front bumper is dirty and the measurement of the distance between the vehicles becomes difficult
When ABS warning lamp is ON
When the SNOW mode switch is turned ON

CHECK CAUSE OF AUTOMATIC CANCELLATION
Check if there is any cancellation cause in the "CAUSE OF AUTO-CANCEL" on "WORK SUPPORT" of "ICC/ADAS" with CONSULT.

Is it displayed?

NO

GO TO 2.

"OPE SW VOLT CIRC"

Refer to DTC Description .

"VHCL SPD UNMATCH"

Refer to DTC Description .

"IGN LOW VOLT"

Refer to DTC Description .

"CAN COMM ERROR"

Refer to DTC Description .

"ICC SENSOR CAN COMM ERR"

Refer to DTC Description .

"ABS/TCS/VDC CIRC"

Refer to DTC Description .

"ECD CIRCUIT"

Refer to DTC Description .
PERFORM ALL OF THE SELF-DIAGNOSIS
1. Perform "All DTC Reading".
2. Check if any DTC is detected in self-diagnosis results of "ICC/ADAS". Refer to DTC Index .
Is any DTC detected?

YES

GO TO 3.

NO

GO TO 4.
REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace malfunctioning parts identified by the self-diagnosis result.

GO TO 6.
CHECK EACH SWITCH AND VEHICLE SPEED SIGNAL
1. Start the engine.
2. Check that the following items operate normally in "DATA MONITOR" of "ICC/ADAS".
  - "VHCL SPEED SE"
  - "BRAKE SW"
  - "DYNA ASIST SW"
Is there a malfunctioning item?

All items are normal

GO TO 5.

"VHCL SPEED SE"

Refer to DTC Description .

"BRAKE SW"

Refer to DTC Description .

"DYNA ASIST SW"

Refer to DTC Description .
REPLACE ADAS CONTROL UNIT
Replace the ADAS control unit. Refer to Removal and Installation .

GO TO 6.
CHECK DCA SYSTEM
1. Erase "self-diagnosis result", and then perform "All DTC Reading" again after performing the action test. (Refer to Description for action test.)
2. Check that the DCA system is normal.
INSPECTION END