Diagnosis System

DIAGNOSIS SYSTEM

1. DESCRIPTION
The ECU controls the function of cruise control on this vehicle. Data of the cruise control or DTC can be read from DLC3 of the vehicle. When a trouble occurs with cruise control, check that the CRUISE main indicator light does not come on but DTC inspection is performed. Therefore when there seems to be a problem with the cruise control, use the intelligent tester (with CAN VIM) or SST to check and troubleshoot it.

2. CHECK DLC3




a. The hybrid vehicle control ECU of the vehicle uses ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.




If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.




b. Connect the cable of the intelligent tester (with CAN VIM) to the DLC3, turn the power switch ON (IG) 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 of 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.

3. CHECK INDICATOR




a. Turn the power switch ON (IG).
b. Check that the CRUISE main indicator light comes on when the cruise control 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 there is a problem with the indicator light, inspect the CRUISE main indicator light circuit.
- If a malfunction occurs in the vehicle speed sensor, stop light switch or other related parts while driving with cruise control, and the hybrid vehicle control ECU activates AUTO CANCEL of the cruise control and then the CRUISE main indicator light starts to blink, informing the driver of the malfunction. At the same time, data of the malfunction is stored as a DTC.