DCA System Not Activated (Switch Is On)

DCA SYSTEM NOT ACTIVATED (SWITCH IS ON)

Description

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


Diagnosis Procedure


1. 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?
Not displayed-GO TO 2.
"OPE SW VOLT CIRC"-Refer to "DTC Logic" DCA.
"VHCL SPD UNMATCH"-Refer to "DTC Logic" DCA.
"IGN LOW VOLT"-Refer to "DTC Logic" DCA.
"CAN COMM ERROR"-Refer to "ADAS CONTROL UNIT : DTC Logic" DCA.
"ICC SENSOR CAN COMM ERR"-Refer to "DTC Logic" DCA.
"ABS/TCS/VDC CIRC"-Refer to "DTC Logic" DCA.
"APA HI TEMP"-Refer to "DTC Logic" C1F03.
"ECD CIRCUIT"-Refer to "DTC Logic" C1A26.

2. 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" A L L Diagnostic Trouble Codes ( DTC ).
Is any DTC detected?
YES- GO TO 3.
NO- GO TO 4.

3. REPAIR OR REPLACE MALFUNCTIONING PARTS

Repair or replace malfunctioning parts identified by the self-diagnosis result.
- GO TO 6.

4. 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 Logic" DCA.
Revision: March 20122013 Infiniti JX
"BRAKE SW"-Refer to "DTC Logic" DCA.
"DYNA ASIST SW"-Refer to "DTC Logic" DCA.

5. REPLACE ADAS CONTROL UNIT

Replace the ADAS control unit. Refer to "Removal and Installation" Removal and Installation.
- GO TO 6.

6. CHECK DCA SYSTEM

1.Erase "self-diagnosis result", and then perform "All DTC Reading" again after performing the action test.
(Refer to "Description" DCA for action test.)
2.Check that the DCA system is normal.
- INSPECTION END
Revision: March 20122013 Infiniti JX