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Home >> Lincoln >> 2012 >> MKZ Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (HVAC - Climate Control System - General Information And Diagnostics (Except Hybrid)) >> Diagnosis And Testing >> Climate Control System >> Pinpoint Tests >> Pinpoint Test A: DTC P0532 or P0533 >> Pinpoint Test A: DTC P0532 Or P0533

Pinpoint Test A: DTC P0532 Or P0533

WARNING: This page is about a different variant/trim than selected.
  1. A1 CHECK THE PCM OUTPUT VOLTAGE 
    • Ignition OFF.
    • Disconnect: A/C Pressure Transducer C1260.
    • Ignition ON.
    • Measure the voltage between ground and A/C pressure transducer C1260-2, circuit LE424 (YE/GN), harness side.
      Fig 1: Measuring Voltage Between Ground And A/C Pressure Transducer C1260-2, Circuit LE424 (YE/GN), Harness Side
      G07787095Courtesy of FORD MOTOR CO.
    • Is the voltage between 4.7 and 5.1 volts? 
    • Yes:  GO to A2.
    • No:  REPAIR circuit LE424 (YE/GN) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  2. A2 CHECK THE PCM SENSOR GROUND 
    • Measure the voltage between A/C pressure transducer C1260-1, circuit RE407 (YE/VT), harness side and A/C pressure transducer C1260-2, circuit LE424 (YE/GN), harness side.
      Fig 2: Measuring Voltage Between A/C Pressure Transducer C1260-1, Circuit RE407 (YE/VT) And C1260-2, Circuit LE424 (YE/GN)
      G06262509Courtesy of FORD MOTOR CO.
    • Is the voltage between 4.7 and 5.1 volts? 
    • Yes:  If diagnosing DTC P0532  , GO to A3. If diagnosing DTC P0533  , GO to  A5.
    • No:  REPAIR circuit RE407 (YE/VT) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  3. A3 CHECK THE A/C PRESSURE TRANSDUCER HIGH 
    • Enter the following diagnostic mode on the scan tool: A/C Pressure (ACP_PRESS) PCM PID.
    • While observing the ACP_PRESS PCM PID, connect a fused jumper between A/C pressure transducer C2160-3, circuit VH433 (VT/OG), harness side and A/C pressure transducer C1260-2, circuit LE424 (YE/GN), harness side.
      Fig 3: Checking A/C Pressure Transducer High
      G06262510Courtesy of FORD MOTOR CO.
    • Does the ACP_PRESS PCM PID voltage read greater than 4 volts? 
    • Yes:  INSTALL a new A/C pressure transducer. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    • No:  GO to A4.
  4. A4 CHECK CIRCUIT VH433 (VT/OG) FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: PCM C175B.
    • Measure the resistance between ground and A/C pressure transducer C1260-3, circuit VH433 (VT/OG), harness side.
      Fig 4: Measuring Resistance Between Ground And A/C Pressure Transducer C1260-3, Circuit VH433 (VT/OG)
      G07787098Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes:  GO to  A7.
    • No:  REPAIR circuit VH433 (VT/OG) for a short to ground. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  5. A5 CHECK THE A/C PRESSURE TRANSDUCER HIGH 
    • Enter the following diagnostic mode on the scan tool: A/C Pressure (ACP_PRESS) PCM PID.
    • While observing the ACP_PRESS PCM PID, connect a fused jumper between A/C pressure transducer C1260-3, circuit VH433 (VT/OG), harness side and A/C pressure transducer C1260-1, circuit RE407 (YE/VT), harness side.
      Fig 5: Checking A/C Pressure Transducer High
      G06262512Courtesy of FORD MOTOR CO.
    • Does the ACP_PRESS PCM PID voltage read less than 4.9 volts? 
    • Yes:  INSTALL a new A/C pressure transducer. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    • No:  GO to A6.
  6. A6 CHECK CIRCUIT VH433 (VT/OG) FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: PCM C175B.
    • Ignition ON.
    • Measure the voltage between ground and A/C pressure transducer C1260-3, circuit VH433 (VT/OG), harness side.
      Fig 6: Measuring Voltage Between Ground And A/C Pressure Transducer C1260-3, Circuit VH433 (VT/OG)
      G07787100Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes:  REPAIR circuit VH433 (VT/OG) for a short to voltage. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    • No:  GO to A7.
  7. A7 CHECK CIRCUIT VH433 (VT/OG) FOR A SHORT TO CIRCUIT LE424 (YE/GN) OR RE407 (YE/VT) 
    • Ignition OFF.
      • NOTE: For DTC P0532 only.
      Fig 7: Measuring Resistance Between A/C Pressure Transducer C1260-3, Circuit VH433 (VT/OG) And C1260-1, Circuit RE407 (YE/VT)
      G06262514Courtesy of FORD MOTOR CO.
    • Measure the resistance between A/C pressure transducer C1260-3, circuit VH433 (VT/OG), harness side and A/C pressure transducer C1260-1, circuit RE407 (YE/VT), harness side.
      • NOTE: For DTC P0533 only.
      Fig 8: Measuring Resistance Between A/C Pressure Transducer C1260-3, Circuit VH433 (VT/OG) And C1260-2, Circuit LE424 (YE/GN)
      G06262515Courtesy of FORD MOTOR CO.
    • Measure the resistance between A/C pressure transducer C1260-3, circuit VH433 (VT/OG), harness side and A/C pressure transducer C1260-2, circuit LE424 (YE/GN), harness side.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes:  GO to A8.
    • No:  REPAIR circuit VH433 (VT/OG) for a short to circuit LE424 (YE/GN) or RE407 (YE/VT). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  8. A8 CHECK CIRCUIT VH433 (VT/OG) FOR AN OPEN 
    • For 2.5L and 3.0L only  , measure the resistance between A/C pressure transducer C1260-3, circuit VH433 (VT/OG), harness side and PCM C175B-31, circuit VH433 (VT/OG), harness side.
      Fig 9: Checking Circuit VH433 (VT/OG) For Open (For 2.5L And 3.0L)
      G07787103Courtesy of FORD MOTOR CO.
    • For 3.5L only  , measure the resistance between A/C pressure transducer C1260-3, circuit VH433 (VT/OG), harness side and PCM C175B-63, circuit VH433 (VT/OG), harness side.
      Fig 10: Checking Circuit VH433 (VT/OG) For Open (For 3.5L Only)
      G07787104Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to A9.
    • No:  REPAIR circuit VH433 (VT/OG) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  9. A9 CHECK THE PCM CONNECTION 
    • Disconnect all the PCM connectors.
    • Inspect the module connectors for:
      • corrosion.
      • pushed-out terminals.
      • damaged terminals.
    • Connect and correctly seat all the PCM connectors.
    • Clear the DTCs.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new PCM. TEST the system for normal operation.
    • No:  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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