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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1614 (Vehicle Dynamic Suspension) >> Diagnostic Tests >> Vehicle Dynamic Suspension >> Pinpoint Tests >> Pinpoint Test I: The Air Compressor Runs Continuously with the Ignition Switch in the OFF Position and No DTCs Are Set >> PINPOINT TEST I: THE AIR COMPRESSOR RUNS CONTINUOUSLY WITH THE IGNITION SWITCH IN THE OFF POSITION AND NO DTCs ARE SET

PINPOINT TEST I: THE AIR COMPRESSOR RUNS CONTINUOUSLY WITH THE IGNITION SWITCH IN THE OFF POSITION AND NO DTCs ARE SET

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
  1. I1 CHECK FOR CORRECT VDM OPERATION 
    • Key in OFF position.
    • Toggle the air suspension switch to the OFF position.
    • Verify the air compressor no longer runs 60 minutes after the ignition switch is placed in the OFF position.
    • Does the air compressor continue running after the 60 minutes elapse? 
    1. YES  : Go to  I2.
    2. NO  : The system is functioning correctly at this time. EXPLAIN the 60 minute time out to the customer.
  2. I2 ISOLATE THE VDM 
    • Disconnect: VDM C2131a
    • Does the air compressor continue to run? 
    1. YES  : Go to  I3.
    2. NO  : INSTALL a new VDM. REFER to Vehicle Dynamics Module (VDM) . TEST the system for normal operation.
  3. I3 ISOLATE THE AIR COMPRESSOR RELAY 
    • Disconnect: Air Compressor Relay
    • Does the air compressor continue to run? 
    1. YES  : Go to  I4.
    2. NO  : INSTALL a new relay. TEST the system for normal operation.
  4. I4 CHECK THE AIR COMPRESSOR ACTUATION CIRCUIT FOR A SHORT TO VOLTAGE 
    • Disconnect: Air Compressor C1179
      • Fig 1: Checking Circuit For Voltage
      GF0013888Courtesy of FORD MOTOR CO.
    • Measure the voltage between air compressor C1179-2, circuit 538 (GY/RD), harness side and ground.
    • Is any voltage present? 
    1. YES  : REPAIR circuit 538 (GY/RD). TEST the system for normal operation.
    2. NO  : INSTALL a new air compressor assembly. REFER to Air Suspension Compressor . TEST the system for normal operation.
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