P2004
P2004-INTAKE MANIFOLD RUNNER CONTROL STUCK OPEN
For a complete wiring diagram, refer to the Wiring Information.
- When Monitored:
With the engine running, when the valve closes, below a calibrated RPM, depending upon pedal position.
- Set Condition:
The Powertrain Control Module (PCM) detects that the position feedback of the Manifold Flow Valve Position Sensor is not within range of the adapted value learned during in-plant initialization or after a non volatile memory reset (adaptive memory clear).
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.
1. 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 2
No
- Perform the CHECKING FOR AN INTERMITTENT DTC diagnostic procedure. Checking for an Intermittent DTC.
2. (K857) 5-VOLT SUPPLY CIRCUIT VOLTAGE
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 7
No
- Go To 3
3. (K857) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
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. PCM Verification Test.
No
- Go To 4
4. (K857) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
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 5
No
- Repair the (K857) 5-volt Supply circuit for a short to ground.
- Perform the PCM VERIFICATION TEST. PCM Verification Test.
5. (K857) 5-VOLT SUPPLY CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT
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 6
No
- Repair the (K857) 5-volt Supply circuit for a short to the (K900) Sensor Ground circuit.
- Perform the PCM VERIFICATION TEST. PCM Verification Test.
6. (K857) 5-VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE
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 16
No
- Repair the (K857) 5-volt Supply circuit for an open circuit or high resistance.
- Perform the PCM VERIFICATION TEST. PCM Verification Test.
7. (K602) MFV SIGNAL CIRCUIT VOLTAGE
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 12
No
- Go To 8
8. (K602) MFV SIGNAL CIRCUIT SHORTED TO VOLTAGE
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. PCM Verification Test.
No
- Go To 9
9. (K602) MFV SIGNAL CIRCUIT SHORTED TO GROUND
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 10
No
- Repair the (K602) MFV Signal circuit for a short to ground.
- Perform the PCM VERIFICATION TEST. PCM Verification Test.
10. (K602) MFV SIGNAL CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT
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 11
No
- Repair the (K602) MFV Signal circuit for a short to the (K900) Sensor Ground circuit.
- Perform the PCM VERIFICATION TEST. PCM Verification Test.
11. (K602) MFV SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
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 16
No
- Repair the (K602) MFV Signal circuit for an open circuit or high resistance.
- Perform the PCM VERIFICATION TEST. PCM Verification Test.
12. (K900) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE
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 13
No
- Repair the (K900) Sensor Ground circuit for an open circuit or high resistance.
- Perform the PCM VERIFICATION TEST. PCM Verification Test.
13. (K602) MFV SIGNAL CIRCUIT SHORTED TO THE (K857) 5-VOLT SUPPLY CIRCUIT
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. PCM Verification Test.
No
- Go To 14
14. (Z909) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
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 15
No
- Repair the (Z909) Ground circuit for an open circuit or high resistance.
- Perform the PCM VERIFICATION TEST. PCM Verification Test.
15. 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. Search for 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. PCM Verification Test.
No
- Replace the Manifold Flow Valve.
- Perform the PCM VERIFICATION TEST. PCM Verification Test.
16. 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. Search for any Technical Service Bulletins that may apply.
Were any problems found?
Yes
- Repair as necessary.
- Perform the PCM VERIFICATION TEST. PCM Verification Test.
No
- Replace and program the Powertrain Control Module (PCM).
- Perform the PCM VERIFICATION TEST. PCM Verification Test.