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Home › Chrysler › 2009 › Sebring Base, 2D Convertible, EDG › Repair and Diagnosis › Engine Performance › System › DTCS P0503 To P060B - GPEC › P050B-Cold Start Ignition Timing Performance › Diagnostic Test

Diagnostic Test

  1. ACTIVE DTC 
    NOTE: Low battery voltage can cause excessive current draw in very hot and very cold ambient temperatures. Look closely at the temperatures at which this DTC set and make sure the battery can pass a load test before continuing.
    NOTE: Diagnose and repair any other DTCs set in the PCM before proceeding with this test.
    1. Turn the ignition on.
    2. With the scan tool, select View DTCs and review the DTC environmental information.

      Is the DTC Active at this time?

      Yes 

      • Go to step  2

      No 

  2. THROTTLE PLATE INSPECTION 
    1. Turn the ignition off.
    2. Remove the air cleaner assembly.
    3. Check for any signs of a foreign material (ice, dirt, or excessive carbon build up) on the throttle plate or in the bore causing the throttle plate to stick.

      Were any problems found?

      Yes 

      No 

      • Go to step  3
  3. DIRTY AIR FILTER 
    1. Remove and inspect the air filter.

      Were any problems found?

      Yes 

      No 

      • Go to step  4
  4. CONTAMINATED FUEL 
    1. Inspect the fuel for contamination. (dirt, water, or other foreign material)

      Were any problems found?

      Yes 

      No 

      • Go to step  5
  5. EXCESSIVE RESISTANCE IN THE (K124) ETC MOTOR (+) CIRCUIT 
    Fig 1: Checking ETC Motor Circuit
    GC0100039Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Using a voltmeter, perform a voltage drop test by backprobing the (K124) ETC Motor (+) circuit at the Throttle Body harness connector and the PCM harness connector. Make sure the voltmeter leads are connected so that positive polarity is displayed on the voltmeter.
      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.
    3. Start the engine.

      Is the voltage below 0.5 volts?

      Yes 

      • Go to step  6

      No 

  6. EXCESSIVE RESISTANCE IN THE (K126) ETC MOTOR (-) CIRCUIT 
    Fig 2: Checking ETC Motor Circuit
    GC0100038Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Using a voltmeter, perform a voltage drop test by backprobing the (K126) ETC Motor (-) circuit at the Throttle Body harness connector and the PCM harness connector. Make sure the voltmeter leads are connected so that positive polarity is displayed on the voltmeter.
      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.
    3. Start the engine.

      Is the voltage below 0.5 volts?

      Yes 

      • Go to step  7

      No 

  7. THROTTLE BODY 
    1. Turn the ignition off.
    2. Disconnect special tool #8815-1 from the C2 PCM harness connector.
      NOTE: Use special tool #8815 to avoid possible damage to the Throttle Body harness connector.
    3. Measure the resistance of the ETC Motor by probing the appropriate terminals of special tool #8815 for the (K124) ETC Motor (+) circuit and the (K126) ETC Motor (-) circuit.

      Is the resistance between 2.5 and 25 ohms at closed throttle?

      Yes 

      • Go to step  8

      No 

  8. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Body 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.
    4. Refer to any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

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