Collision Mitigation Braking System (CMBS) Symptom Troubleshooting Index
Symptom
Diagnostic procedure
Also check for
CMBS OFF switch does not turn On/turn Off (CMBS indicator does not change)
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
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.
  
The MID does not indicate with the CMBS operating
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 installation.
2.
Check the front grille for warpage.
3.
Check the wheel alignment.
Driving conditions, weather, environmental influences.
Undetectable environment.
CMBS indicator (on the MID) does not come on
Do the gauge control module self-diagnostic function.
  
CMBS indicator (on the MID) does not go off
Symptom troubleshooting.