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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 84 (5.7L - DTCS P0457 To P0633 - NGC - 3500 Cab & Chassis) >> Diagnosis and Testing >> P0533-A/C Pressure Sensor Circuit High >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. ACTIVE DTC 
    NOTE:

    Diagnose and repair any communication DTCs before continuing.

    NOTE:

    Make sure the A/C refrigerant System is properly charged in accordance with the Service Information.

    1. Start the engine and allow it to reach normal operating temperature.
      WARNING:

      When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.

      NOTE:

      Diagnose and repair any system voltage or sensor supply voltage DTCs before continuing with this test.

    2. With the scan tool, select View DTCs.

      Is the DTC Active at this time?

      Yes 

      • Go To  2.

      No 

  2. A/C PRESSURE TRANSDUCER 
    Fig 1: A/C Pressure Transducer Harness Connector
    GC0090862Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the A/C Pressure Transducer harness connector.
    3. Ignition on, engine not running.
    4. With the scan tool, monitor the A/C Pressure Transducer voltage.
    5. Connect a jumper wire between the (C18) A/C Pressure Signal circuit and the (C918) Sensor Ground circuit in the Transducer harness connector.
      NOTE:

      The sensor voltage should be approximately 0.0 Volts (plus or minus.1 volt) with the jumper wire in place.

      Does the scan tool display the voltage as described above?

      Yes 

      • Verify that there is good pin to terminal contact in the A/C Pressure Transducer and the Powertrain Control Module connectors. Replace the A/C Pressure Transducer if no problems were found with the connectors.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  3.
        NOTE:

        Remove the jumper wire before continuing.

  3. (C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO VOLTAGE 
    Fig 2: Measuring Voltage On (C18) A/C Pressure Signal Circuit In A/C Pressure Transducer Harness Connector
    GC0090863Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the C1 TIPM harness connector.
    3. Ignition on, engine not running.
    4. Measure the voltage on the (C18) A/C Pressure Signal circuit in the A/C Pressure Transducer harness connector.

      Is there any voltage present?

      Yes 

      • Repair the short to voltage in the (C18) A/C Pressure Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  4.
  4. (C18) A/C PRESSURE SIGNAL CIRCUIT OPEN 
    Fig 3: Measuring Resistance Of (C18) A/C Pressure Signal Circuit From A/C Pressure Transducer Harness Connector To C1 TIPM Harness Connector
    GC0090859Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Measure the resistance of the (C18) A/C Pressure Signal circuit from the A/C Pressure Transducer harness connector to C1 TIPM harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  5.

      No 

      • Repair the open in the (C18) A/C Pressure Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  5. (C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO THE (C818) 5-VOLT SUPPLY CIRCUIT 
    Fig 4: Measuring Resistance Between (C18) A/C Pressure Signal Circuit And (C818) 5-volt Supply Circuit In A/C Pressure Transducer Harness Connector
    GC0090864Courtesy of CHRYSLER LLC
    1. Measure the resistance between the (C18) A/C Pressure Signal circuit and the (C818) 5-volt Supply circuit in the A/C Pressure Transducer harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the short between the (C818) 5-volt Supply circuit and the (C18) A/C Pressure Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  6.
  6. (C918) SENSOR GROUND CIRCUIT OPEN 
    Fig 5: Measuring Resistance Of (C918) Sensor Ground Circuit From A/C Pressure Sensor Harness Connector To C1 TIPM Harness Connector
    GC0090865Courtesy of CHRYSLER LLC
    1. Disconnect the C1 TIPM harness connector.
    2. Measure the resistance of the (C918) Sensor Ground circuit from the A/C Pressure Sensor harness connector to the C1 TIPM harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  7.

      No 

  7. TOTALLY INTEGRATED POWER MODULE (TIPM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the related A/C Pressure Transducer and the Totally Integrated Power Module (TIPM).
    2. Look for any chafed, pierced, pinched or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the A/C Pressure Transducer and the Totally Integrated Power Module connectors.
    4. Refer to any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      No 

      • Replace and program the Powertrain Control Module in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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