Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

DTC IS ACTIVE
NOTE:
If there are any 5-volt reference DTCs present, diagnose and repair those DTCs before continuing with this test procedure.
1. Ignition on, engine not running.
2. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
CHECK THE (K834) EGR VALVE 5-VOLT SUPPLY CIRCUIT VOLTAGE

Fig 1: Checking EGR Valve 5-Volt Supply Circuit Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the EGR Valve Assembly harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (K834) EGR Valve 5-Volt Supply circuit at the EGR Valve Assembly harness connector.
  Is the measurement above 4.8 volts?
  
  Yes
  - Go To 3
  No
  - Repair the (K834) EGR Valve 5-Volt Supply circuit for an open or short to ground.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
CHECK THE (K683) EGR POSITION SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 2: Checking EGR Position Signal Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Measure the resistance between ground and the (K683) EGR Position Signal circuit at the EGR Valve Assembly.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (K683) EGR Position Signal circuit for a short to ground.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
CHECK THE (K683) EGR POSITION SIGNAL CIRCUIT FOR A SHORT TO THE (K934) SENSOR GROUND CIRCUIT

Fig 3: Checking For Short Between EGR Position Signal Circuit And Sensor Ground Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between the (K683) EGR Position Signal circuit and the (K934) Sensor Ground circuit at the EGR Valve Assembly.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the between the (K683) EGR Position Signal circuit and the (K934) Sensor Ground circuit.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
CHECK THE (K683) EGR POSITION SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 4: Checking EGR Position Signal Circuit For An Open Or High Resistance
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (K683) EGR Position Signal circuit between the EGR Valve Assembly harness connector and the PCM C2 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the (K683) EGR Position Signal circuit for an open or high resistance.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
CHECK THE EGR VALVE
1. Reconnect the EGR Valve Assembly harness connector.
2. Reconnect the PCM C2 harness connector.
3. Turn the ignition on.
4. With the scan tool, erase DTCs.
5. Turn the ignition off.
6. Disconnect the EGR Valve Assembly harness connector.
7. Connect a jumper between the (K683) EGR Position Signal circuit and the (K834) EGR Valve 5-Volt Supply circuit at the EGR Valve Assembly harness connector.
8. Turn the ignition on.
9. With the scan tool, select View DTCs.
  NOTE:
  The scan tool should display a P0406-EGR Position Sensor Circuit High DTC as active or pending with the jumper in place.
  
  Does the scan tool display the DTC as described above?
  
  Yes
  - Replace the EGR Valve in accordance with the service information. Refer to VALVE, EXHAUST GAS RECIRCULATION (EGR), REMOVAL .
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 7
POWERTRAIN CONTROL MODULE
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the EGR Valve 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. Perform any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Replace the Powertrain Control Module in accordance with the service information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .