Diagnosis System
DIAGNOSIS SYSTEM1. LASER BEAM AXIS ADJUSTMENT
a. Use the intelligent tester to adjust the optical axis for the optical axis.
HINT: While adjusting the optical axis of the laser radar sensor, the CRUISE main indicator light illuminates and FC is displayed on the multi-information display.
2. 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. When a malfunction occurs in the dynamic laser cruise control system, the DTCs are stored in the ECM.
NOTE:
- The master warning light goes off if the system returns to normal condition.
- Since the stored data in the ECM is erased by disconnecting the EFI and ETCS fuses or the battery terminal, do not disconnect them until the inspection has been completed.
3. DESCRIPTION
a. The ECM 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 in the multi-information display on the combination meter when checking for DTCs, there may be a problem with the combination meter or the CAN communication and multiplex communication system. Use the intelligent tester to check and solve the problem.
4. CHECK DLC3
a. The vehicle's ECM uses ISO 9141-2 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.
Part 1:
Part 2:
If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and the connector.
b. Connect the cable of the intelligent tester to the DLC3, turn the ignition switch to the ON position, and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem with either the vehicle or the tester.
- If communication is normal when the tester is connected to another vehicle, inspect the DLC3 or the original vehicle.
- If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual.
5. CHECK INDICATOR
a. Turn the ignition switch on.
b. Check that the CRUISE main indicator light and RADAR READY indicator come on when the main switch ON-OFF button is pushed on, and that the indicator light goes off when the ON-OFF button is pushed off.
HINT:
- If the indicator check result shows a problem, proceed to troubleshooting for the combination meter.
- If a malfunction occurs in the vehicle speed sensors, the stop light switch, or other related parts during cruise control driving, the ECU actuates AUTO CANCEL of the cruise control and blinks the CRUISE main indicator light. During constant speed control, the master warning light blinks. During vehicle-to-vehicle distance control, the master warning light comes on. This indicator light informs the driver of the malfunction. At the same time, the malfunction is stored as a diagnostic trouble code.