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Home >> Chrysler >> 2011 >> 300 Base, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 86 (5.7L - DTCS P2128 To U1418 - NGC - 3500 Cab & Chassis) >> Diagnosis and Testing >> P2305-Ignition Coil 2 Secondary Circuit- Insufficient Ionization >> Diagnostic Test

Diagnostic Test

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  1. ACTIVE DTC 
    NOTE:

    Diagnose any ASD related DTCs before continuing.

    1. Start the engine.
    2. With the scan tool, select View DTCs.
      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.

      Does the DTC become Active?

      Yes 

      • Go To  2.

      No 

  2. (K342) ASD CONTROL OUTPUT CIRCUIT 
    Fig 1: Using 12-volt Test Light Connected To Ground To Probe ASD Control Output Circuit In Ignition Coil Harness Connector
    GC0090756Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the Coil on Plug harness connector.
    3. Ignition on, engine not running.
      NOTE:

      Make sure the test light is probing the circuit before actuating the Coil or a DTC may set and not allow the actuation.

    4. Using a 12-volt test light connected to ground, probe the (K342) ASD Control Output circuit in the Coil on Plug harness connector.
    5. With the scan tool, actuate the ASD.

      Does the test light illuminate brightly?

      Yes 

      • Go To  3.

      No 

      • Repair the open or short to ground in the (K342) ASD Control Output circuit between the TIPM and Coil harness connector.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
        • NOTE:

        Stop All Actuations.

  3. COIL ON PLUG RESISTANCE 
    1. Turn the ignition off.
      NOTE:

      The following resistance measurement should be taken between 70° and 80° F.

    2. Measure the resistance of the Coil on Plug.
    3. 4.7L and 3.7L Primary Ignition Coil resistance is 0.6 to 0.9 of an ohm at 25° C (77° F).
    4. 5.7L Primary Ignition Coil resistance is 0.558 to 0.682 of an ohm at 25° C (77° F).

      Is the resistance within the given specification for the Ignition Coil being tested?

      Yes 

      • Go To  4.

      No 

  4. IGNITION COIL 
    Fig 2: Using 12-volt Test Light Connected To 12-volt Source To Probe Coil Control Circuit
    GC0090757Courtesy of CHRYSLER LLC
    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-volt source, probe the (K17) Coil Control No. 2 circuit.
    2. Crank the engine for 5 seconds while observing the test light.

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

      Brightly blinking. 

      • Verify that there is good pin to terminal contact in the Ignition Coil and the Powertrain Control Module connectors. Replace the Ignition Coil if no problems were found in the connectors.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      ON constantly. 

      • Go To  5.

      OFF constantly. 

      • Go To  6.
  5. (K17) COIL CONTROL NO. 2 CIRCUIT SHORTED TO GROUND 
    Fig 3: Measuring Resistance Between Ground And Coil Control Circuit In Coil On Plug Harness Connector
    GC0090992Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the C2 PCM harness connector.
    3. Measure the resistance between ground and the (K17) Coil Control No. 2 circuit in the Coil on Plug harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the short to ground in the (K17) Coil Control No. 2 circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  7.
  6. (K17) COIL CONTROL NO. 2 CIRCUIT OPEN 
    Fig 4: Checking Coil Control Circuit For An Open, Short To Ground, And Short To Voltage
    GC0090759Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the C2 PCM 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 PCM Pinout Box (special tool #8815A, Kit, NGC, 38 Position) to perform diagnosis.

    3. Measure the resistance of the (K17) Coil Control No. 2 circuit from the Coil on Plug harness connector to the appropriate terminal of PCM Pinout Box (special tool #8815A, Kit, NGC, 38 Position).

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  7.

      No 

      • Repair the open in the (K17) Coil Control No. 2 circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  7. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Ignition Coil 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. Verify that there is good pin to terminal contact in the Ignition Coil and the Powertrain Control Module connectors.
    4. Refer to any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      No 

      • Replace and program the Powertrain Control Module in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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