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Home >> Jeep >> 2019 >> Renegade High Altitude, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1331 (1.3L - DTCS P2116 To U0155) >> DTC Troubleshooting >> P2308-Ignition Coil 3 Secondary Circuit - Insufficient Ionization >> 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. Start the engine.
    2. With the scan tool, read DTCs and record on the repair order.
      NOTE:

      It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data.

      Is the DTC active or pending?

      Yes 

      • Go To  2

      No 

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

      Are there any ASD Relay DTCs active or pending?

      Yes 

      No 

      • Go To  3
  3. CHECK THE ASD RELAY OUTPUT CIRCUIT 
    1. Turn the ignition off.
    2. Disconnect the Ignition Coil harness connector.
    3. Turn the ignition on.
    4. With a scan tool, actuate the ASD Relay.
    5. Using a 12-volt test light connected to ground, probe the ASD Relay Output circuit at the Ignition Coil harness connector.

      Does the test light illuminate brightly?

      Yes 

      • Go To  4

      No 

      • Repair the ASD Relay Output circuit for an open or short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
        NOTE:

        Stop All Actuations.

  4. CHECK THE IGNITION COIL CONTROL CIRCUIT OPERATION 
    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.

    1. Using a 12-volt test light connected to a 12.0 volt source, probe the (K18) Coil Control 3 circuit at the Ignition Coil harness connector.
    2. Crank the engine for 5.0 seconds while observing the test light.

      What is the condition of the test light while cranking the engine?

      Brightly blinking 

      • Go To  5

      ON constantly 

      • Go To  6

      OFF constantly 

      • Go To  7
  5. VISUALLY INSPECT THE SPARK PLUG 
    1. Turn the ignition off.
    2. Remove the Spark Plug(s) in accordance with the Service Information.
    3. Inspect the Spark Plug(s) for the following conditions:
      • Cracks
      • Carbon Tracking
      • Foreign Material
      • Gap size out of specifications
      • Loose or broken electrode

      Were any of the above conditions present?

      Yes 

      • Replace the Spark Plug in accordance with the Service Information.
        NOTE:

        If carbon tracking is found on the Spark Plug, inspect the boot on the Coil On Plug assembly for signs of damage and replace if necessary.

      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

  6. CHECK THE (K18) COIL CONTROL 3 CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the PCM C2 harness connector.
    3. Check for continuity between ground and the (K18) Coil Control 3 circuit at the Ignition Coil harness connector.

      Is there continuity between ground and the (K18) Coil Control 3 circuit?

      Yes 

      • Repair the (K18) Coil Control 3 circuit for a short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  8
  7. CHECK THE (K18) COIL CONTROL 3 CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    1. Turn the ignition off.
    2. Disconnect the PCM C2 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.

    3. Connect the (special tool #10436, Adapter, GPEC Diagnostic).
    4. Measure the resistance of the (K18) Coil Control 3 circuit from the Ignition Coil harness connector to the GPEC Adaptor.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  8

      No 

      • Repair the (K18) Coil Control 3 circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  8. VERIFY THE IGNITION COIL DID NOT CAUSE THE PCM DRIVER FAILURE 
    NOTE:

    An internally shorted or damaged Ignition Coil can cause an internal PCM coil driver failure. Do not replace the PCM without first determining if the ignition coil is the cause of the failure.

    1. Remove the Ignition Coil that is controlled by the coil driver setting the DTC.
    2. Install the ignition coil in another coil location that did not have a DTC set against it.
    3. Turn the ignition on.
    4. With the scan tool, erase DTCs.
    5. Start and run the engine for up to one minute.
      NOTE:

      If the engine will not start, crank the engine three times for 10 seconds.

    6. With a scan tool, read DTCs.

      Did a correlating fault set for the new coil location?

      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 

      • The wiring or poor connection problem has been repaired.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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