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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 202 (DTCS P150D To UO168, Pre-Diagnostic Troubleshooting Procedure) >> P2303-Ignition Coil 2 Secondary Circuit-Insufficient Ionization >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2007 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1) ACTIVE DTC 

    Ignition on, engine not running.

    With a scan tool, read DTCs.

    Is the DTC active at this time? 

    Yes 

    1. Go to  2).

    No 

    1. Go to  9).
  2. 2) IGNITION COIL OPERATION 
    NOTE: This test must be repeated for the adjacent ignition wire.

    Turn the ignition off.

    Disconnect the ignition wire from the spark plug.

    NOTE: Before continuing inspect the ignition wire for damage or carbon tracking coil or the spark plug insulator boot. If a problem is found, replace the ignition wire.

    Install a spark tester to the ignition wire.

    While cranking the engine observe the spark coming from the spark tester.

    NOTE: A crisp blue spark that is able to jumper the gap of the spark tester should be generated.

    Is a good spark generated? 

    Yes 

    1. Ensure the cylinder is operating properly. If OK, replace the Spark Plug.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go to  3).
  3. 3) IGNITION WIRE 
    NOTE: This test must be repeated for the adjacent ignition wire.

    Turn the ignition off.

    Remove the ignition wire.

    Measure the resistance of the ignition wire.

    Is the resistance below 10K ohms? 

    Yes 

    1. Go to  4).

    No 

    1. Replace the Ignition Wire.
    2. Perform POWERTRAIN VERIFICATION TEST .
  4. 4) (K344) ASD RELAY OUTPUT CIRCUIT 
    Fig 1: Checking ASD Relay Output Circuit With 12-Volt Test Light
    GC0041628Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Ignition Coil harness connector.

    Turn the ignition on.

    With the scan tool, actuate the ASD Relay.

    Using a 12-volt test light connected to ground, probe the (K344) ASD Relay Output circuit in the Ignition Coil harness connector.

    Does the test light illuminate brightly? 

    Yes 

    1. Go to  5).

    No 

    1. Repair the (K344) ASD Relay Output circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  5. 5) IGNITION COIL 
    Fig 2: Checking Ignition Coil Control Circuit With 12-Volt Test Light
    GC0041630Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Ignition Coil harness connector.

    Using a 12-volt test light connected to 12-volts, probe the (K17) Coil Control No.2 circuit.

    Crank the engine for 5 second while observing the test light.

    Does the test light blink/flicker? 

    Yes 

    Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go to  6).
  6. 6) (K17) COIL CONTROL NO.2 CIRCUIT OPEN 
    Fig 3: Measuring Resistance Of Coil Control No. 2 Circuit
    GC0041778Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Ignition Coil harness connector.

    Disconnect the 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 Miller Special Tool #8815 to perform diagnosis.

    Measure the resistance of the (K17) Coil Control No.2 circuit between the Ignition Coil harness connector and the special tool #8815 terminal.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go to  7).

    No 

    1. Repair the (K17) Coil Control No.2 circuit for an open.
    2. Perform POWERTRAIN VERIFICATION TEST .
  7. 7) (K17) COIL CONTROL NO.2 SHORTED TO GROUND 
    Fig 4: Measuring Resistance Between Ground & Coil Control No. 2 Circuit
    GC0041779Courtesy of CHRYSLER LLC

    Measure the resistance between ground and the(K17) Coil Control No.2 circuit in the Ignition Coil harness connector.

    Is the resistance below 100k ohms? 

    Yes 

    1. Repair the (K17) Coil Control No.2 circuit for a short to ground.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go to  8).
  8. 8) PCM 

    Before continuing, check the PCM harness connector terminals for corrosion, damage or terminal push out. Repair as necessary.

    If there are no possible causes remaining, view repair. 

    Repair 

    1. Replace and program the Powertrain Control Module in accordance with the Service Information.
    2. Perform POWERTRAIN VERIFICATION TEST .
  9. 9) SPARK PLUG 

    Turn the ignition off.

    Remove the Spark Plug.

    Inspect the Spark Plug for the following conditions.

    - Cracks

    - Carbon Tracking

    - Foreign Material

    - Gap size out of specifications

    - Loose or broke electrode

    NOTE: Lightly tap the bottom of the spark plug on a solid surface. The electrode in the spark plug should not move.

    Were any of the above condition present? 

    Yes 

    1. Replace the Spark Plug.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Refer to INTERMITTENT CONDITION .
    2. Perform POWERTRAIN VERIFICATION TEST .
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