How to Troubleshoot DTCS

How to Troubleshoot DTCs

Check and clear the DTCs with the HDS.

NOTE: When both the adaptive cruise control (ACC) and CMBS indicators come on, do the adaptive cruise control (ACC) system troubleshooting first (except DTC 100).

Before troubleshooting, check and note these items:
- Ask the customer about the conditions when the problem occurred, and try to reproduce the same conditions for troubleshooting.
- If the symptom does not appear and the CMBS indicator does not come on during the test-drive, but troubleshooting is done based on the DTC, check for poor connections or loose terminals at all connectors related to the circuit that you are troubleshooting.
- After the troubleshooting or repairs are done, clear the DTCs, and test-drive the vehicle under the same conditions as when the DTC was originally.
- The adaptive cruise control (ACC) system and the CMBS may sometimes stop working because of the environment (weather, road conditions, driving conditions, etc.). A DTC may be stored in these cases.

DTCs that may be stored even when the system is normal:

DTC 88: Adaptive cruise control (ACC) indicator does not come on, CMBS indicator comes on
The millimeter wave radar unit overheats, the power supply voltage for the millimeter wave radar unit is low, or there is a communication error between the adaptive cruise control (ACC) unit and the millimeter wave radar unit.

DTC 95: Adaptive cruise control (ACC) indicator does not come on, CMBS indicator comes on
Battery voltage is too high.

DTC 96: Adaptive cruise control (ACC) indicator does not come on, CMBS indicator comes on
Battery voltage is too low.

DTC 97: Adaptive cruise control (ACC) indicator does not come on, CMBS indicator comes on
Extensive driving on a rough road or the ignition switch is turned ON (II)/OFF.

DTC 102: Adaptive cruise control (ACC) indicator does not come on, CMBS indicator comes on
Parking brake not fully released, or driving with the parking brake stuck.