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.
MID does not indicate when the CMBS OFF switch is operated
An open or increased resistance in the wire.
A short in the wire.
Buzzer does not sound
Do the gauge control module self-diagnostic function.
  
Buzzer does not sound when the CMBS OFF switch is operated
Do the gauge control module self-diagnostic function.
  
MID does not indicate with the CMBS working
Do the gauge control module self-diagnostic function.
  
CMBS works 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.
CMBS worked 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.
CMBS does not work
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 does not come on
Do the gauge control module self-diagnostic function.
  
CMBS indicator does not go off
  
Head up warning does not flash when the system warn