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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 425 (5.7L - DTCS P0205 To P058B - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> P0533-A/C Pressure Sensor Circuit High >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. ACTIVE DTC 
    NOTE:

    Diagnose and repair any CAN bus, communication or implausible signal DTCs before proceeding with this test.

    NOTE:

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

    NOTE:

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

    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 can result in possible serious or fatal injury.

    2. With the scan tool, select View DTCs.

      Is the DTC Active at this time?

      Yes 

      • Go To  2

      No 

  2. (K855) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE 
    2. Turn the ignition off.
    3. Disconnect the A/C Pressure Transducer harness connector.
    4. Disconnect the PCM C1 harness connector.
    5. Turn the ignition on.
    6. Measure the voltage of the (K855) 5-Volt Supply circuit in the A/C Pressure Transducer harness connector.

      Is there any voltage present?

      Yes 

      • Repair the (K855) 5-Volt Supply circuit for a short to voltage.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  3
  3. (C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE 
    2. Measure the voltage of the (C18) A/C Pressure Sensor Signal circuit in the A/C Pressure Transducer harness connector.

      Is there any voltage present?

      Yes 

      • Repair the (C18) A/C Pressure Sensor Signal circuit for a short to voltage.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  4
  4. (C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K855) 5-VOLT SUPPLY CIRCUIT 
    2. Measure the resistance between the (C18) A/C Pressure Sensor Signal circuit and the (K855) 5-Volt Supply circuit in the A/C Pressure Transducer harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the (C18) A/C Pressure Sensor Signal circuit for a short to the (K852) 5-Volt Supply circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  5
  5. (C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 1: Checking A/C Pressure Sensor Signal Circuit For Open Or High Resistance
    GC0150238Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Measure the resistance of the (C18) A/C Pressure Sensor Signal circuit between the A/C Pressure Transducer harness connector and the PCM C1 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  6

      No 

      • Repair the (C18) A/C Pressure Sensor Signal circuit for an open circuit or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  6. (K914) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE 
    2. Measure the resistance of the (K914) Sensor Ground circuit between the A/C Pressure Transducer harness connector and the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  7

      No 

      • Repair the (K914) Sensor Ground circuit for an open circuit or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  7. A/C PRESSURE TRANSDUCER 
    2. Turn the ignition off.
    3. Connect the PCM harness connectors.
    4. Connect a jumper wire between the (K914) Sensor Ground circuit and the (C18) A/C Pressure Sensor Signal circuit in the A/C Pressure Transducer harness connector.
    5. Turn the ignition on.
    6. With the scan tool, read the A/C Pressure Transducer signal voltage.

      Is the voltage below 1.0 Volt with the jumper wire in place?

      Yes 

      No 

      • Go To  8
  8. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the A/C Pressure Transducer and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals.
    4. Perform any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      • Repair as necessary.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

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