DCA System Not Activated (Switch Is On)

DCA SYSTEM NOT ACTIVATED (SWITCH IS ON)


Description

The DCA 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 DCA 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 snow mode switch is turned ON
- When driving into a strong light (i.e., sunlight)
- When the ICC sensor integrated unit body window is dirty and the measurement of the distance between the vehicles becomes difficult




DCA SYSTEM NOT ACTIVATED (SWITCH IS 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" with CONSULT-III.
Is it displayed?
Not displayed-GO TO 2.
"VHCL SPD UNMATCH"-Refer to DCA.
"IGN LOW VOLT"-Refer to DCA.
"CAN COMM ERROR"-Refer to DCA.
"ABS/TCS/VDC CIRC"-Refer to DCA.
"BCU CIRCUIT"-Refer to DCA.
"APA HI TEMP"-Refer to C1F03.
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". Refer to Testing and Inspection.
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".
- "VHCL SPEED SE"
- "BRAKE SW"
- "DCA ON SW"
Is there a malfunctioning item?
All items are normal-GO TO 5.
"VHCL SPEED SE"-Refer to DCA.
"BRAKE SW"-Refer to DCA.
"DCA ON SW"-Refer to DCA.
5.REPLACE ICC SENSOR INTEGRATED UNIT
1. Replace the ICC sensor integrated unit. Refer to Exploded View.
2. Adjust the laser beam aiming. Refer to Description.
- 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 DCA for action test.)
2. Check that the DCA system is normal.
- INSPECTION END