Diagnostic Test

DTC IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, clear DTCs.
3. Start the engine and allow it to reach operating temperature.
  NOTE: It may be necessary to test drive the vehicle to get this DTC to reset.
4. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go to step 2
  No
  - Perform the CHECKING FOR AN INTERMITTENT DTC diagnostic procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K857) 5-VOLT SUPPLY CIRCUIT VOLTAGE

Fig 1: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Manifold Flow Valve connector.
3. Turn the ignition on.
4. Measure the voltage of the (K857) 5-volt Supply circuit in the Manifold Flow Valve harness connector.
  Is the voltage between 4.5 and 5.5 volts?
  
  Yes
  - Go to step 7
  No
  - Go to step 3
(K857) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE

Fig 2: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Powertrain Control Module (PCM) harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (K857) 5-volt Supply circuit in the Manifold Flow Valve harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (K857) 5-volt Supply circuit for a short to voltage.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 4
(K857) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND

Fig 3: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (K857) 5-volt Supply circuit in the Manifold Flow Valve harness connector.
  Is the resistance above 1000 Ohms?
  
  Yes
  - Go to step 5
  No
  - Repair the (K857) 5-volt Supply circuit for a short to ground.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K857) 5-VOLT SUPPLY CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT

Fig 4: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (K857) 5-volt Supply circuit and the (K900) Sensor Ground circuit in the Manifold Flow Valve harness connector.
  Is the resistance above 100 Ohms?
  
  Yes
  - Go to step 6
  No
  - Repair the (K857) 5-volt Supply circuit for a short to the (K900) Sensor Ground circuit.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K857) 5-VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE

Fig 5: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K857) 5-volt Supply circuit between the Manifold Flow Valve harness connector and the Powertrain Control Module (PCM) C2 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to step 16
  No
  - Repair the (K857) 5-volt Supply circuit for an open circuit or high resistance.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K602) MFV SIGNAL CIRCUIT VOLTAGE

Fig 6: Checking MFV Signal Circuit
Courtesy of CHRYSLER LLC
1. Measure the voltage of the (K602) MFV Signal circuit in the Manifold Flow Valve harness connector.
  Is the voltage between 4.5 and 5.5 volts?
  
  Yes
  - Go to step 12
  No
  - Go to step 8
(K602) MFV SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 7: Checking MFV Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Powertrain Control Module (PCM) C2 harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (K602) MFV Signal circuit in the Manifold Flow Valve harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (K602) MFV Signal circuit for a short to voltage.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 9
(K602) MFV SIGNAL CIRCUIT SHORTED TO GROUND

Fig 8: Checking MFV Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance between ground and the (K602) MFV Signal circuit in the Manifold Flow Valve harness connector.
  Is the resistance above 100 Ohms?
  
  Yes
  - Go to step 10
  No
  - Repair the (K602) MFV Signal circuit for a short to ground.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K602) MFV SIGNAL CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT

Fig 9: Checking MFV Signal Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (K602) MFV Signal circuit and the (K900) Sensor Ground circuit in the Manifold Flow Valve harness connector.
  Is the resistance above 100 Ohms?
  
  Yes
  - Go to step 11
  No
  - Repair the (K602) MFV Signal circuit for a short to the (K900) Sensor Ground circuit.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K602) MFV SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE

Fig 10: Checking MFV Signal Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K602) MFV Signal circuit between the Manifold Flow Valve harness connector and the Powertrain Control Module (PCM) harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to step 16
  No
  - Repair the (K602) MFV Signal circuit for an open circuit or high resistance.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K900) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE

Fig 11: Checking MFV Ground Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K900) Sensor Ground circuit between the Manifold Flow Valve harness connector and the Powertrain Control Module (PCM) harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to step 13
  No
  - Repair the (K900) Sensor Ground circuit for an open circuit or high resistance.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K602) MFV SIGNAL CIRCUIT SHORTED TO THE (K857) 5-VOLT SUPPLY CIRCUIT

Fig 12: Checking MFV Signal Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (K602) MFV Signal circuit and the (K857) 5-volt Supply in the Manifold Flow Valve harness connector.
  Is the resistance below 100 Ohms?
  
  Yes
  - Repair the (K602) MFV Signal circuit for a short to the (K857) 5-volt Supply circuit.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 14
(Z909) GROUND CIRCUIT OPEN OR HIGH RESISTANCE

Fig 13: Checking MFV Ground Circuit
Courtesy of CHRYSLER LLC
1. Using a 12-volt test light connected to 12 volts, check the (Z909) Ground circuit in the Manifold Flow Valve harness connector.
  NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
  
  Is the test light illuminated and bright?
  
  Yes
  - Go to step 15
  No
  - Repair the (Z909) Ground circuit for an open circuit or high resistance.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
MANIFOLD FLOW VALVE
1. Turn the ignition off.
2. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Manifold Flow Valve and the Powertrain Control Module (PCM).
3. Look for any chafed, pierced, pinched, or partially broken wires.
4. Look for broken, bent, pushed out or corroded terminals.
5. Refer to any Technical Service Bulletins that may apply.
6. Remove the Manifold Flow Valve.
7. Inspect the return spring and the valve blade assembly for debris stuck in the path or for frozen/seized blades.
  NOTE: Manifold Flow Valve over travel or under travel can cause this DTC to set.
  
  NOTE: If the Manifold Flow Valve blades are seized in the intake manifold, the manifold will have to be replaced.
  
  NOTE: If the Manifold Flow Valve is replaced, a non volatile memory reset must be performed to learn the new port flap adaptive values.
  
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Replace the Manifold Flow Valve in accordance with the Service Information.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Manifold Flow 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. Refer to any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .