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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System (VDC/TCS/Abs) (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> C1199 Brake Booster >> DTC Description

DTC Description

DTC DETECTION LOGIC 

DTC No. CONSULT screen item(Trouble diagnosis content) DTC detected condition
C1199-01 BRAKE BOOSTER(Brake booster) Diagnosis condition When ignition switch is ON.
Signal (terminal) Vacuum sensor signal
Threshold When brake booster vacuum is approx. 0 mmHg (0 kPa) during engine running.
Diagnosis delay time 1 second or more

POSSIBLE CAUSE 

NOTE: SYMBOL Confirm if DTC is PAST or CRNT. If DTC is CRNT, proceed with Diagnosis Procedure. If DTC is PAST, clear the DTC. Do not replace the ABS actuator and electric unit (control unit) for a PAST DTC.
PAST DTC CRNT DTC
  • Harness or connector
  • ABS actuator and electric unit (control unit) power supply system
  • Fuse
  • Fusible link
  • Battery
  • Harness or connector
  • Vacuum sensor (brake booster)
  • Vacuum piping
  • ABS actuator and electric unit (control unit)

FAIL-SAFE 

Electrical vacuum assistance of brake booster is suspended