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Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
  1. ACTIVE DTC 
    1. Turn the ignition on.
    2. With the scan tool, select View DTCs. Record DTC and Freeze Frame information.
    3. Start the engine and allow it to reach normal 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.

      WARNING:

      The normal operating temperature of the EGR system is very high. Never work around or attempt to service any part of the EGR system until it has cooled. Failure to follow these instructions can 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.

    4. With the scan tool, select View DTCs.

      Is the DTC Active at this time?

      Yes 

      • Go To  2

      No 

  2. (K34) EGR POSITION SENSOR SIGNAL CIRCUIT SHORTED TO THE (F856) 5-VOLT SUPPLY CIRCUIT 
    Fig 1: Measuring Resistance Between (K34) EGR Position Sensor Signal Circuit And (F856) 5-Volt Supply Circuit In EGR Solenoid Harness Connector
    GC0090810Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the EGR Solenoid harness connector.
    3. Disconnect the C2 PCM harness connector.
    4. Measure the resistance between the (K34) EGR Position Sensor Signal circuit and the (F856) 5-volt Supply circuit in the EGR Solenoid harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the short between the (K34) EGR Position Sensor Signal circuit and the (F856) 5-volt Supply circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  3
  3. (K34) EGR POSITION SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE 
    Fig 2: Measuring Voltage On (K34) EGR Sensor Signal Circuit In EGR Solenoid Harness Connector
    GC0090811Courtesy of CHRYSLER GROUP, LLC
    1. Ignition on, engine not running.
    2. Measure the voltage on the (K34) EGR Sensor Signal circuit in the EGR Solenoid harness connector.

      Is there any voltage present?

      Yes 

      • Repair the short to voltage in the (K34) EGR Position Sensor Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  4
  4. EGR SOLENOID ASSEMBLY 
    Fig 3: EGR Valve Assembly Connector
    GC0090812Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Connect the C2 PCM harness connector.
    3. Connect a jumper wire between the (K34) EGR Position Sensor Signal circuit and the (K900) Sensor ground circuit.
    4. With the scan tool, monitor the EGR Position Sensor voltage.
    5. Ignition on, engine not running.
      NOTE:

      The sensor voltage should be approximately 0.0 Volts (plus or minus 0.1 of a volt) with the jumper wire in place.

      Does the scan tool display the voltage as described above?

      Yes 

      • Verify that there is good pin to terminal contact in the Solenoid and the Powertrain Control Module connectors. Replace the EGR Valve Assembly in accordance with the Service Information if no problems were found with the connectors.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  5
        NOTE:

        Remove the jumper wire before continuing.

  5. (K34) EGR POSITION SENSOR SIGNAL CIRCUIT OPEN 
    1. Turn the ignition off.
    2. Disconnect the C2 PCM harness connector.
    3. Measure the resistance of the (K34) EGR Position Sensor Signal circuit from the EGR Solenoid harness connector to the appropriate terminal of C2 PCM connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  6

      No 

      • Repair the open in the (K34) EGR Position Sensor Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  6. (K900) SENSOR GROUND CIRCUIT OPEN 
    1. Measure the resistance of the (K900) Sensor ground circuit from the EGR Solenoid harness connector to the appropriate terminal of C2 PCM connector.

      Is the resistance below 30 Ohms?

      Yes 

      • Go To  7

      No 

      • Repair the open in the (K900) Sensor ground circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  7. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the EGR Solenoid Assembly 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 Solenoid 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 STANDARD PROCEDURE .

      No 

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