CMBS Indicator Does Not Go Off

Collision Mitigation Brake System (CMBS) Symptom Troubleshooting - CMBS indicator does not go off

CMBS indicator does not go off

1. Turn the ignition switch to ON (II), then wait for 10 seconds.

2. Press and hold the CMBS OFF switch for a second or more to turn off the system.

3. Watch the CMBS indicator.

Does the CMBS indicator go off?

YES -

The system is OK at this time.

NO -

Go to step 4.

4. Clear the DTCs with the HDS.

5. Turn the ignition switch to ON (II), then wait for 10 seconds.

6. Check for the ACC system, VSA, and PCM DTCs with the HDS.

Are any DTCs indicated?

YES -

Troubleshoot the indicated DTC(s).

NO -

Go to step 7.

7. Start the engine, and wait at least 2 seconds.

8. Watch the CMBS indicator.

Does the CMBS indicator stay off?

YES -

The system is OK at this time.

NO -

Go to step 9.

9. Stop the engine.

10. Check for ACC system DTCs with the HDS.

Are any DTCs indicated?

YES -

Troubleshoot the indicated DTC(s).

NO -

Test the CMBS OFF switch Testing and Inspection. If the switch is OK, do the gauge control module self-diagnostic function Testing and Inspection.