Diagnosis System

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: DIAGNOSIS SYSTEM

1. DIAGNOSIS FUNCTION

(a) The diagnosis function makes the master warning light and the multi-information display come on, and the cruise main indicator light blinks as shown in the illustration. When a malfunction occurs in the dynamic radar cruise control system, the DTCs are stored in the driving support ECU.

Text in Illustration





HINT
During constant speed control mode, the cruise main indicator light (constant speed control mode) flashes. During vehicle-to-vehicle distance control mode, the cruise main indicator light (vehicle-to-vehicle distance control mode) flashes.





NOTICE:
The master warning light goes off if the system returns to normal condition.





2. DESCRIPTION

(a) The hybrid vehicle control ECU controls the dynamic radar cruise control system of the vehicle. The data and DTCs relating to the dynamic radar cruise control system can be read from the DLC3 of the vehicle. If either DTC or CRUISE OK is not displayed on the multi-information display on the combination meter assembly when checking for DTCs, there may be a problem with either the combination meter or the CAN communication system. Use the Techstream to check and solve the problem.

3. CHECK DLC3

(a) Check the DLC3 General Information.

4. CHECK INDICATOR

(a) Turn the power switch on (IG).





Text in Illustration





(b) Check that the cruise main indicator light and RADAR READY indicator come on when the cruise control is turned on by pushing the main switch ON-OFF button, and that the indicator light and the indicator go off when the ON-OFF button is pushed again.

HINT
* If the indicator check result shows a problem, proceed to troubleshooting of the combination meter assembly.
* If a malfunction occurs in the vehicle speed sensors, the stop light switch assembly, or other related parts during cruise control driving, the ECU actuates AUTO CANCEL of the cruise control and blinks the cruise main indicator light. This indicator light informs the driver of the malfunction. At the same time, the malfunction is stored as a diagnostic trouble code.