Diagnosis System

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: DIAGNOSIS SYSTEM

1. DIAGNOSIS FUNCTION

(a) The diagnosis function makes the cruise control indicator light for vehicle-to-vehicle distance control mode illuminate in amber when a malfunction is detected. When a malfunction occurs in the dynamic radar cruise control system, the DTCs are stored in the driving support ECU.

Text in Illustration









2. DESCRIPTION

(a) The driving support 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. 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 control indicator light illuminates in green when the cruise control system is turned on using the cruise control switch (ON-OFF button), and that the indicator light goes off when the cruise control system is turned off using the cruise control switch (ON-OFF button).

HINT
* If the indicator check result shows a problem, proceed to troubleshooting of the combination meter sub-assembly.
* While driving with the cruise control system controlling vehicle speed, the driving support ECU assembly will automatically cancel cruise control system control of vehicle speed when a malfunction is detected in one of the following: vehicle speed sensors, stop light switch assembly, or other related parts. When control of vehicle speed by the cruise control system is automatically canceled, the vehicle-to-vehicle cruise control indicator light illuminates in or changes to amber. In addition, a warning code may be displayed and malfunction data is stored as a DTC.