Cruise Main Indicator Light Circuit: Description

When the cruise control main switch is on, the CRUISE main indicator light and RADAR READY indicator come on. This indicates the control condition (presence or absence of a vehicle in front, vehicle-to-vehicle distance, and set vehicle speed) and fail-safe state through the multiplex communication and CAN communication system. The master warning light and CRUISE main indicator light come on and vehicle to- vehicle distance information is displayed on the combination meter as the alarm buzzer sounds. Items such as "Clean Radar Sensor", "Cruise not Available", "Check Cruise System", and "Radar Cruise Ready" are displayed on the multi-information display on the combination meter when the ECM detects signals from each sensor and actuator and sends them to the combination meter via CAN and BEAN.

HINT:

If the vehicle in front in the same lane significantly decreases vehicle speed or another vehicle moves in front of your vehicle, adequate deceleration cannot be applied and the vehicle-to-vehicle distance will shorten. At this time, the system sounds the buzzer and the master warning light blinks to warn the driver. Each indicator in the dynamic radar cruise control uses CAN and BEAN for communication. Therefore, if there are any malfunctions in this circuit, check for DTCs in the CAN communication and multiplex communication systems before troubleshooting this circuit.

1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER 
   1. Connect the intelligent tester to the DLC3.
   2. Select the ACTIVE TEST, use the intelligent tester to generate a control command, and then check that the CRUISE main indicator light comes on.

   Combination meter (Meter ECU): 

   ACTIVE TEST REFERENCE CHART
   
   

   Item	Test Details	Diagnostic Note
   CRUISE INDIC	Turns CRUISE main indicator light ON / OFF	-

   OK: 

   Indicator light comes on. 

   NG : REPLACE COMBINATION METER ASSEMBLY 

   OK : Go To Next Step 

2. READ VALUE ON INTELLIGENT TESTER 
   1. Connect the intelligent tester to the DLC3.
   2. Turn the engine switch on (IG), and turn the intelligent tester main switch on.
   3. Check the DATA LIST for proper functioning of the CRUISE main indicator light.

   ECM (Cruise control): 

   DATA LIST REFERENCE CHART
   
   

   Item	Measurement Item / Di(Range)	Normal Condition	Diagnostic Note
   CCS READY M	Cruise control system standby condition (Main CPU) / ON or OFF	Each time main switch is pushed, ON/OFF changes	1
   CCS INDICATOR M	Cruise indicator signal (Main CPU) / ON or OFF	ON : "CCS READY" ON OFF : "CCS READY" OFF	2

   OK: 

   When the cruise control main switch is operated, the display changes as shown above. 

   HINT:

   1 is OK, but 2 is NG --> DTC output or ECM failure

   NG : REPLACE ECM 

   OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE