General Troubleshooting Information

General Troubleshooting Information




CMBS Indicator

If the system is OK, the CMBS indicator goes off 2 seconds after turning the ignition switch ON (II). The CMBS indicator comes on when the adaptive cruise control (ACC) unit detects a problem in the system.

NOTE:
- The adaptive cruise control (ACC) indicator indicates problems related with the adaptive cruise control (ACC) system and the CMBS.
- The CMBS indicator only indicates its system problems.
- The CMBS works with related systems such as the VSA system. If these related systems have a problem the CMBS does not operate. In this case, the CMBS indicator and the related system indicator come on.

When a problem is detected by the self-diagnostic function, the CMBS stops operating, turns on the CMBS indicator, indicates the problem on the MID, and stores the DTC.

CMBS OFF Switch
- The CMBS OFF switch selects the FAR or NEAR setting.
- Press and hold the CMBS OFF switch for at least a second to turn the CMBS off and on.

CMBS Indication
- If the system is OK, the CMBS indicator comes on for 5 seconds after turning the ignition switch ON (II) with the CMBS OFF switch on.
- When the system is activated, the word "BRAKE" is indicated on the MID and the warning buzzer sounds.
- If the system stops operating because of a problem, the MID indicates the problem.

Adaptive Cruise Control (ACC) Unit
The adaptive cruise control (ACC) unit controls the brake and warning when the system recognizes the danger of a collision.
The adaptive cruise control (ACC) unit has a self-diagnostic function. If the system detects a problem, it stops the CMBS, and turns on the CMBS indicator.

CMBS Initial Check
The adaptive cruise control (ACC) unit turns on the CMBS indicator if the CMBS initial check is not completed.

NOTE: For proper CMBS operation, if the adaptive cruise control (ACC) unit or the VSA modulator-control unit is replaced, do the CMBS initial check incomplete troubleshooting (DTC 100).

Millimeter Wave Radar Unit
The millimeter wave radar unit recognizes the position of the vehicle running ahead and detects the two vehicles speed differential.
The adaptive cruise control (ACC) unit receives this information from the millimeter wave radar unit. The millimeter wave radar unit also has an error detect function, and sends a signal to the adaptive cruise control (ACC) unit if an error is detected.