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Home >> Infiniti >> 2011 >> QX56 AWD >> Repair and Diagnosis >> Suspension >> Suspension Control Systems >> Air LEVELIZER Control System >> DTC/Circuit Diagnosis >> DTC C1808: Air Sus COMPRS FNCTN >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

MALFUNCTION DETECTED CONDITION AND POSSIBLE CAUSE

DTC Display item Malfunction detected condition Possible cause
C1808 AIR SUS COMPRS FNCTN The cumulative operating time of the air compressor reaches 180 seconds or more.
NOTE: Cumulative time is cleared under the following conditions:
  • Ignition switch: OFF
  • Exhaust conditions: satisfied [Vehicle height remains 15 mm (0.59 in) or more higher than the reference height for 30 seconds.]
  • Harness or connector
  • Vehicle height sensor
  • Air compressor (exhaust solenoid)
  • Air compressor relay
  • Overloaded
  • Rear shock absorber (air chamber)
  • Rear suspension component parts
  • Air tube