Diagnostic Test

1. Diagnose and repair any other active component or circuit DTCs before continuing with this procedure.
2. Turn the ignition on.
3. With the scan tool, select View DTCs. Copy DTC and Freeze Frame information.
4. Start the engine and allow it to reach operating temperature.
   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.

   NOTE:

   Attempt to operate the vehicle under conditions similar to which the DTC was set.

   NOTE:

   It may be necessary to test drive the vehicle within the DTC monitoring conditions in order for this DTC to set.

5. With a scan tool, select View DTCs.

   Is the DTC Active at this time?

   Yes 

   • Go To  2.

   No 

   • Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .

Visually inspect the engine for any of the following conditions:

• Worn serpentine belt
• Binding Engine-Driven accessories: A/C Compressor, P/S Pump, Water pump.
• Misalignment of the Water pump, P/S Pump and A/C Compressor pulleys
• Corroded PCM power and ground circuits.
• Misalignment of the Water pump, P/S Pump and A/C Compressor pulleys
• Corroded PCM power and ground circuits.
• Improper CKP, CMP, MAP, and TP Sensor mounting
• Poor connector/terminal to component connection for CKP sensor, CMP sensor, MAP sensor, TP sensor, fuel injector, ignition coil, etc.
• Vacuum leaks
• Restricted Air Induction system or Exhaust system.
• Internal engine component failures.

Were any of the above conditions present?

Yes 

• Repair as necessary.
• Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

No 

• Go To  3.

Fig 1: Using 12-Volt Test Light Connected To Ground To Probe ASD Control Output Circuit In Ignition Coil Harness Connector

Courtesy of CHRYSLER GROUP, LLC

1. Turn the ignition off.
   NOTE:

   The 3.7L V6 engine uses a modified Distributorless Ignition System (DIS) with coil consolidation on the left side engine bank.

2. Disconnect the Ignition Coil No. 2 or No. 5 harness connector.
3. Disconnect the Fuel Injector No. 2 harness connector.
4. Ignition on, engine not running.
5. Using a 12-volt test light connected to ground, probe the (F342) ASD Control Output circuit in the Ignition Coil harness connector and Fuel Injector harness connector before the actuation.
   NOTE:

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

6. With the scan tool, actuate the ASD.
   Fig 2: Using 12-Volt Test Light Connected To Ground To Check (F342) ASD Control Output Circuit In Fuel Injector 2 Harness Connector

   Courtesy of CHRYSLER GROUP, LLC

   Does the test light illuminate brightly?

   Yes 

   • Go To  4.

   No 

   • Repair the excessive resistance or short to ground in the (F342) ASD Control Output circuit.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

1. Turn the ignition off.
2. Connect the Ignition Coil No. 2 or No. 5 harness connector.
3. Remove the Ignition Coil.
4. Leave the Fuel Injector harness connector of the cylinder being tested disconnected.
5. Install a spark tester on the Ignition Coil.
6. While cranking the engine observe the spark coming from the spark tester.
7. Perform the same test on the ignition wire side of the Ignition coil.
   NOTE:

   A crisp blue spark that is able to jump the gap of the spark tester should be generated at the coil on plug and at the end of the ignition wire.

   Is good spark present?

   Yes 

   • Go To  5.

   No 

   • Go To  13.
     NOTE:

     Connect the Fuel Injector harness connector before continuing.

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
   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 conditions present?

   Yes 

   • Replace the Spark Plug in accordance with the Service Information. Refer to SPARK PLUG, REMOVAL .
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

   No 

   • Go To  6.

1. Install Fuel Pressure Decay Tester (special tool #8978A, Decay Tool, Fuel) to the fuel rail.
2. Start the engine and observe the fuel pressure reading.
   NOTE:

   Fuel pressure specification is 407 kPa +/- 34 kPa (59 psi +/- 5 psi).

   Choose a conclusion that best matches your fuel pressure reading.

   Within Specification 

   • Go To  7.

   Below Specification 

   • Go To  11.

   Above Specification 

   • Replace the fuel filter/pressure regulator.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

1. Perform the Fuel Pressure Leak Down Test. Refer to DIAGNOSIS AND TESTING .

   Were any repairs made after performing the leak down test?

   Yes 

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

   No 

   • Go To  8.

Check for any of the following conditions/mechanical problems:

• ENGINE VACUUM - must be at least 13 inches in neutral
• ENGINE VALVE TIMING - must be within specifications
• ENGINE COMPRESSION - must be within specifications
• ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks.
• ENGINE PCV SYSTEM - must flow freely
• TORQUE CONVERTER STALL SPEED - must be within specifications
• POWER BRAKE BOOSTER - no internal vacuum leaks
• FUEL - must be free of contamination
• CAM LOBES - must not be worn excessively
• CYLINDER LEAKAGE TEST - must be within specifications
• VALVE SPRINGS - cannot be weak or broken

Are there any engine mechanical problems?

Yes 

• Repair as necessary.
• Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

No 

• Go To  16.

1. Turn the ignition off.
2. Disconnect the No. 2 Fuel Injector harness connector.
3. Ignition on, engine not running.
   NOTE:

   When a Misfire is detected for a particular cylinder, the PCM will shut down that cylinder's Injector Control circuit.

4. With the scan tool, erase DTCs.
5. Install an Injector Noid light.
6. With the scan tool, actuate the Fuel Injector.

   Does the Noid light blink/flicker during the actuation?

   Yes 

   • Verify that there is good pin to terminal contact in the Fuel Injector and the Powertrain Control Module connectors. If OK, replace the Fuel Injector.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

   No 

   • Go To  10.

Fig 3: Measuring Resistance Of (K12) Injector Control No. 2 Circuit From Fuel Injector Harness Connector To Appropriate Terminal Of PCM Pinout Box 8815

Courtesy of CHRYSLER GROUP, 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. Check the (K12) Injector Control No. 2 circuit for an open, short to ground, and short to voltage.

   Was a problem found with the (K12) Injector Control No. 2 circuit?

   Yes 

   • Repair the excessive resistance or short in the (K12) Injector Control No. 2 circuit.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

   No 

   • Go To  16.

1. Turn the ignition off.
2. Raise the vehicle on a hoist, and disconnect the fuel pressure line at the fuel pump module.
3. Install the Fuel Pressure Decay Tester (special tool #8978A, Decay Tool, Fuel) between the fuel supply line and the fuel pump module.
4. Ignition on, engine not running.
5. With the scan tool, actuate the ASD Fuel System test and observe the fuel pressure gauge.
   NOTE:

   Fuel pressure specification is 407 kPa +/- 34 kPa (59 psi +/- 5 psi).

   Is the fuel pressure within specification?

   Yes 

   • Repair or replace fuel supply line as necessary.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

   No 

   • Go To  12.

1. Turn the ignition off.
2. Remove the Fuel Pump Module and inspect the Fuel Inlet Strainer.

   Is the Fuel Inlet Strainer plugged?

   Yes 

   • Replace the Fuel Pump Inlet Strainer.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

   No 

   • Before continuing, check the Fuel Pump Module harness connector terminals for corrosion, damage, or terminal push out. Make sure the ground circuit is functional. Repair as necessary. Replace the Fuel Pump Module.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

1. Turn the ignition off.
2. Remove the ignition wire.
3. Measure the resistance of the ignition wire.

   Is the resistance below 10K Ohms?

   Yes 

   • Go To  14.

   No 

   • Replace the Ignition Wire.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

Fig 4: Using 12-Volt Test Light Connected To 12-Volt Source To Probe Coil Control Circuit

Courtesy of CHRYSLER GROUP, LLC

1. Disconnect the Ignition Coil harness connector.
2. Using a 12-volt test light connected to 12-volts, probe the (K17) Coil Control circuit.
3. Crank the engine for five seconds while observing the test light.
   NOTE:

   The primary resistance of the 3.7L and 4.7L Ignition coil is 0.6 to 0.9 of an ohm and the resistance of a 5.7L Ignition coil is 0.558 to 0.682 of an ohm at 25° C (77° F).

   Does the test light brightly blink/flicker during the actuation?

   Yes 

   • Verify that there is good pin to terminal contact in the Ignition Coil and the Powertrain Control Module connectors. If OK, replace the Ignition Coil in accordance with the Service Information.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

   No 

   • Go To  15.

Fig 5: Checking Coil Control Circuit For An Open, Short To Ground, And Short To Voltage

Courtesy of CHRYSLER GROUP, 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. Check the (K17) Coil Control circuit for an open, short to ground, and short to voltage.

   Was a problem found with the (K17) Coil Control circuit?

   Yes 

   • Repair the (K17) Coil Control circuit.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

   No 

   • Go To  16.

1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the related Sensor, Coil, Injector, 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 related Sensors, Coils, Injectors, and the Powertrain Control Module connectors.
4. Refer to any Technical Service Bulletins that may apply.

   Were there any problems found?

   Yes 

   • Repair as necessary.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

   No 

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