Collision Mitigation Braking System (CMBS) Symptom Troubleshooting Index (Collision Mitigation Braking System) (2014 2015)

Symptom	Diagnostic procedure	Also check for
CMBS OFF switch does not turn On/turn Off (CMBS indicator does not change)	1. Do the gauge control module self-diagnostic function . 2. Test the CMBS OFF switch .	An open or increased resistance in the wire. A short in the wire.
The MID does not indicate when the CMBS OFF switch is operated	1. Do the gauge control module self-diagnostic function . 2. Test the CMBS OFF switch .	An open or increased resistance in the wire. A short in the wire.
The buzzer does not sound	Do the gauge control module self-diagnostic function .
The buzzer does not sound when the CMBS OFF switch is operated	Do the gauge control module self-diagnostic function .
Though CMBS operates, the information is not displayed on the MID.	Do the gauge control module self-diagnostic function .
The CMBS operates frequently	1. Check the millimeter wave radar installation . 2. Check the front grille for warpage. 3. Check the wheel alignment .	Driving conditions, weather, environmental influence.
The CMBS operated without danger of collision	1. Check the millimeter wave radar installation . 2. Check the front grille for warpage. 3. Check the wheel alignment .	Driving conditions, weather, environmental influence.
The CMBS did not operate	1. Check the millimeter wave radar . 2. Check the front grille for warpage. 3. Check the wheel alignment .	Driving conditions, weather, environmental influences. Undetectable environment.
CMBS indicator does not come on	Do the gauge control module self-diagnostic function .
CMBS indicator does not go off	Symptom troubleshooting .
Heads-up warning does not flash when the system is warning (FCW/LDW camera unit is ok)	1. Do the gauge control module self-diagnostic function . 2. Symptom troubleshooting .
HDS does not communicate with the ACC unit or the vehicle	Troubleshoot the DLC circuit .	Incorrect HDS software.