LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2019 >> Renegade High Altitude, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1379 (1.3L - DTCS P0107 To P025C) >> DTC Troubleshooting >> P023A-Charge Air Cooler Coolant Pump "A" Control Circuit/Open >> 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. CHECK FOR ANY SERVICE BULLETINS OR PCM SOFTWARE UPDATES 
    1. Check for any applicable Service Bulletins or Flash updates related to the DTC.

      Are there any applicable Service Bulletins or Flash updates?

      Yes 

      No 

      • Go To  2
  2. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    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  3

      No 

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

      Are there any LIN Bus Communication, Battery voltage or Charging System DTCs present?

      Yes 

      No 

      • Go To  4
  4. CHECK THE FUSE THAT SUPPLIES THE (A501) FUSED B(+) CIRCUIT 
    1. Check the fuse that supplies the (A501) Fused B(+) circuit.

      Is the fuse open?

      Yes 

      • Go To  5

      No 

      • Go To  6
  5. CHECK THE (A501) FUSED B(+) CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the Charge Air Cooler Coolant Pump harness connector.
    3. Disconnect the PCM C2 harness connector.
    4. Check for continuity between ground and the (A501) Fused B+ circuit at the Charge Air Cooler Coolant Pump harness connector.
      CAUTION:

      Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the GPEC Diagnostic Adaptor to perform the diagnosis.

    5. If it is necessary to probe a terminal at a PCM harness connector, connect the (special tool #10436, Adapter, GPEC Diagnostic) to the appropriate PCM harness connector.
      NOTE:

      There should be no continuity between ground and the circuit being tested.

      Is there continuity between ground and the (A501) Fused B+ circuit?

      Yes 

      • Repair the (A501) Fused B+ circuit for a short to ground. Use the wiring diagram as a guide to trace the circuit and look for any in-line connectors to help isolate the location of the short.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  8
  6. CHECK THE (A501) FUSED B(+) CIRCUIT AND (Z905) GROUND CIRCUIT BY LOAD TESTING THE CIRCUITS AT THE CHARGE AIR COOLER COOLANT PUMP HARNESS CONNECTOR 
    NOTE:

    Why load test a circuit?  A load test is used to determine if a circuit is capable of carrying the amperage needed to perform properly. A 3156 Bulb has approximately 6.0 Ohms of resistance when the bulb is powered  and draws approximately 2.0 amps of current. Read the CIRCUIT LOAD TESTING PROCEDURE for information on building a simple load test tool and for additional load testing information and alternative methods of load testing or voltage drop testing a circuit. Refer to CIRCUIT LOAD TESTING PROCEDURES .

    NOTE:

    A 12-volt test light can be substituted for the load test tool, but only  if the test light draws enough current to effectively load test the circuit. Many high impedance test lights draw very little amperage (less than 0.1 amps) and are not reliable to load test a circuit. To perform a proper load test of a circuit, the tool being used should draw more than approximately 0.75 amps.

    1. Turn the ignition off.
    2. Disconnect the Charge Air Cooler Coolant Pump harness connector.
    3. Connect one lead of a load test tool to the (A501) Fused B(+) circuit and the other lead to the (Z905) Ground circuit at the Charge Air Cooler Coolant Pump harness connector.
      NOTE:

      Compare the brightness of the bulb in the load test tool to that of a direct connection to Battery.

      Is the load test bulb illuminated and bright?

      Yes 

      • Go To  8

      No 

      • Go To  7
  7. DETERMINE IF THE OPEN OR HIGH RESISTANCE IS IN THE (A501) FUSED B(+) CIRCUIT BY LOAD TESTING THE CIRCUIT AT THE CHARGE AIR COOLER COOLANT PUMP HARNESS CONNECTOR 
    1. Disconnect the lead of the load test tool that is connected to the (Z905) Ground circuit at the Charge Air Cooler Coolant Pump harness connector.
    2. Connect the lead to a good chassis ground to determine if the open or high resistance is in the (A501) Fused B(+) circuit.

      Is the load test bulb illuminated and bright?

      Yes 

      • Repair the (Z905) Ground circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Repair the (A501) Fused B(+) circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  8. CHECK THE COOLING SYSTEM FOR AIR POCKETS 
    NOTE:

    If the Auxiliary Coolant Pump detects that the pump speed spikes above a calibrated threshold, which can happen from an air pocket passing through the pump, the internal control will shut the pump motor off to protect it from damage. The diagnostic is still running when this occurs. A series of air pockets passing through the pump can cause enough accumulated pump off time for this fault to set.

    1. Turn the ignition off.
    2. Check the Low Temp Cooling system for proper coolant level and air in the system.

      Were any issue found with the cooling system (low or aerated)?

      Yes 

      • Add coolant if needed and bleed the air from the system.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  9
  9. REPLACE THE CHARGE AIR COOLER COOLANT PUMP AND RETEST FOR DTCS 
    1. Turn the ignition off.
    2. Replace the component in accordance with the Service Information. Refer to PUMP, WATER, REMOVAL AND INSTALLATION .
    3. Connect the component and Electronic Control Unit (ECU) harness connectors.
    4. Turn the ignition on.
    5. With the scan tool, erase all DTCs.
    6. Turn the ignition off for a minimum of 10.0 seconds.
    7. Turn the ignition on.
    8. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    9. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  10

      No 

  10. 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 

      • The wiring or poor connection problem has been repaired.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
scientia non olet · About LEMON Manuals