How to Troubleshoot DTCs

Check and clear the DTCs with the HDS.

Before troubleshooting, check and pay attention to these items:

• Ask the client 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 while test-driving, 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 set. Make sure the CMBS indicator does not come on.
• The ACC system and the CMBS may sometimes stop control because of the environment (weather, road conditions, driving conditions, etc.). A DTC may be stored in these cases.

There may be auto stop system control codes stored even when the system is OK: 

NOTE:  The ACC indicator will not come on, but the CMBS indicator comes on when the following codes are stored.

Code 88: Millimeter Wave Radar Out of Detection Condition 

The millimeter wave radar overheats, the power supply voltage for the millimeter wave radar is low, or there is a communication error between the multipurpose camera unit and the millimeter wave radar.

Code 95: Power Supply Voltage Too High 

The power supply voltage for the multipurpose camera unit is 16.8 V or more.

Code 96: Power Supply Voltage Too Low 

The power supply voltage for the multipurpose camera unit is 9.5 V or less.

Code 97: CMBS Offset Cancel Timeout 

Extensive driving on a rough road or turning the vehicle to the OFF (LOCK) mode when the vehicle is driving.