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Home >> Jeep >> 2019 >> Renegade High Altitude, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1381 (1.3L - DTCS P0521 To P0780) >> DTC Troubleshooting >> P0533-A/C Pressure Sensor Circuit High >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    NOTE:

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

    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR OTHER DTCS 
    1. Refer to the recorded DTCs.

      Are there any system voltage or 5-Volt Reference DTCs present?

      Yes 

      No 

      • Go To  3
  3. CHECK THE (K852) 5-VOLT SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the A/C Pressure Sensor harness connector.
    3. Turn the ignition on.
    4. Measure the voltage on the (K852) 5-Volt Supply circuit in the A/C Pressure Sensor harness connector.

      Does the voltage measure above 5.2 volts?

      Yes 

      • Repair the (K852) 5-Volt Supply circuit for a short to voltage.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK THE (C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Measure the voltage on the (C18) A/C Pressure Sensor Signal circuit at the A/C Pressure Sensor harness connector.

      Does the voltage measure above 5.2 volts?

      Yes 

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

      No 

      • Go To  5
  5. CHECK FOR THE (C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K852) 5-VOLT SUPPLY CIRCUIT 
    1. Check for continuity between the A/C Pressure Sensor Signal circuit and the 5-Volt Supply circuit at the A/C Pressure Sensor harness connector.

      Is there continuity between the A/C Pressure Sensor Signal circuit and the 5-Volt Supply circuit?

      Yes 

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

      No 

      • Go To  6
  6. CHECK THE (K914) SENSOR GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    1. Turn the ignition off.
    2. Disconnect the PCM C1 harness connector.
    3. Measure the resistance of the (K914) Sensor Ground circuit between the A/C Pressure Sensor harness connector and the PCM C2 harness connector.

      Is the resistance below 3.0 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 POWERTRAIN VERIFICATION TEST .
  7. CHECK THE (C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    1. Turn the ignition off.
    2. Disconnect the PCM C1 harness connector.
    3. Measure the resistance of the (C18) A/C Pressure Sensor Signal circuit between the A/C Pressure Sensor harness connector and the PCM C2 harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  8

      No 

      • Repair the (C18) A/C Pressure Sensor Signal circuit for an open circuit or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  8. A/C PRESSURE SENSOR 
    1. Reconnect the PCM C1 harness connector.
    2. Connect a jumper between the (K914) Sensor Ground circuit and the (C18) A/C Pressure Sensor Signal circuit at the A/C Pressure Sensor harness connector.
    3. Turn the ignition on.
    4. With the scan tool, read the A/C Pressure Sensor signal voltage.

      Is the voltage near zero volts with the jumper in place?

      Yes 

      No 

      • Go To  9
  9. CHECK RELATED PCM AND COMPONENT CONNECTIONS 
    1. Perform any Service Bulletins that apply.
    2. Disconnect all PCM harness connectors.
    3. Disconnect all related in-line harness connections (if equipped).
    4. Disconnect the related component harness connectors.
    5. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Check for spread terminals and verify proper terminal tension.

      Repair any conditions that are found.

    6. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    9. With the scan tool, erase DTCs.
    10. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    11. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      No 

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