LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2019 >> Renegade High Altitude, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1383 (1.3L - DTCS U0164 To U1504) >> DTC Troubleshooting >> U02A9-Lost Communication With Charge Air Cooler Coolant Pump >> 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 AN ACTIVE DTC 
    1. Turn the ignition on.
    2. With the scan tool, read DTCs and record on the repair order.

      Is the DTC active or pending?

      Yes 

      • Go To  2

      No 

  2. INSPECT THE CHARGE AIR COOLER COOLANT PUMP FOR SIGNS OF PHYSICAL DAMAGE 
    1. Inspect the Charge Air Cooler Coolant Pump and connector for damage due to road debris.

      Is the Charge Air Cooler Coolant Pump or connector damaged or disconnected?

      Yes 

      No 

      • Go To  3
  3. CHECK THE (A501) FUSED B+ CIRCUIT VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the Charge Air Cooler Coolant Pump harness connector.
    3. Turn the ignition on.
    4. Measure the voltage on the (A501) Fused B+ circuit at the Charge Air Cooler Coolant Pump harness connector.

      Is the voltage equal to battery voltage?

      Yes 

      • Go To  4

      No 

      • Repair the (A501) Fused B+ circuit for an open or short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  4. CHECK THE CHARGE AIR COOLER PUMP (Z901) GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    1. Turn the ignition off.
    2. Measure the resistance between ground and the (Z901) Ground circuit at the Charge Air Cooler Coolant Pump harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the (Z901) Ground circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  5. CHECK THE (D511) LIN BUS CIRCUITS FOR A SHORT TO GROUND 
    1. Disconnect the PCM C1 harness connector.
    2. Check for continuity between ground and the (D511) LIN BUS circuit at the Charge Air Cooler Coolant Pump harness connector.

      Is there continuity between ground and the (D511) LIN BUS circuit?

      Yes 

      • Repair the (D511) LIN BUS circuit for a short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  6
  6. CHECK THE (D511) LIN BUS CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    1. Measure the resistance of the (D511) LIN BUS circuit between the Charge Air Cooler Coolant Pump harness connector and the PCM C1 harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  7

      No 

      • Repair the (D511) LIN BUS circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  7. CHARGE AIR COOLER COOLANT PUMP 
    1. Replace the Charge Air Cooler Coolant Pump in accordance with the Service Information.
    2. Reconnect the PCM C1 harness connector.
    3. Turn the ignition on.
    4. With the scan tool, erase DTCs.
    5. Cycle the ignition off, then back on
    6. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  8

      No 

  8. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all PCM harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. 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.

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