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Collision Mitigation Braking System (CMBS) Symptom Troubleshooting Index (2017)

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 Driving conditions, weather, environmental influence.
CMBS worked without danger of collision Driving conditions, weather, environmental influence.
CMBS does not work
  • Driving conditions, weather, environmental influences.
  • Undetectable environment.
CMBS indicator does not come on Do the gauge control module self-diagnostic function .  
CMBS indicator (amber) does not go off  
Head up warning does not flash when the system warns