When the dynamic radar cruise control system is turned on using the cruise control main switch, the cruise control indicator (vehicle-to-vehicle distance control mode) illuminates. The driving support ECU assembly uses this and other indicators to indicate the control condition (presence or absence of a preceding vehicle, vehicle-to-vehicle distance, and set vehicle speed) and fail-safe state via CAN communication.
If the vehicle in front in the same lane significantly decreases vehicle speed or another vehicle moves in front of this vehicle, adequate deceleration cannot be applied by the cruise control system and the vehicle-to-vehicle distance will become shorter. At this time, the system sounds the buzzer to warn the driver. The indicators for the dynamic radar cruise control system use CAN for communication. Therefore, if there are any indicator malfunctions, check for DTCs in the CAN communication system before troubleshooting this circuit.
CAUTION / NOTICE / HINT
When replacing the combination meter assembly, make sure to replace it with a new one.
When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.
PERFORM ACTIVE TEST USING GTS (Meter Display 1)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Combination Meter / Active Test.
Perform "Active Test" according to the display on GTS.
|Tester Display||Measurement Item||Control Range||Diagnostic Note|
|Meter Display 1||Multi-information display||OFF or All||-|
|Meter Display 1|
GO TO METER / GAUGE SYSTEM Click here
READ VALUE USING GTS (CCS MAIN SW-READY)
Enter the following menus: Powertrain / Radar Cruise / Data List.
Read the Data List according to the display on the GTS.
|Tester Display||Measurement Item||Range||Normal Condition||Diagnostic Note|
|CCS Main SW-Ready||Dynamic radar cruise control system standby condition||ON or OFF||
ON: Dynamic radar cruise control system standby
OFF: Dynamic radar cruise control system not standby
|CCS Main SW-Ready|
|When the cruise control main switch is operated, the display changes shown above.|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here
REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here