Download p2004-intake manifold runner control stuck open

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P2004-INTAKE MANIFOLD RUNNER CONTROL STUCK
OPEN
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For a complete wiring diagram Refer to Section 8W
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When Monitored:
With the engine running, when the valve closes, below a calibrated RPM, depending upon pedal
position.
Set Condition:
The 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).
Possible Causes
INTERMITTENT DTC
(K857) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
(K602) MFV SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K857) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(K602) MFV SIGNAL CIRCUIT SHORTED TO GROUND
(K857) 5 VOLT SUPPLY CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT
(K602) MFV SIGNAL CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT
(K602) MFV SIGNAL CIRCUIT SHORTED TO THE (K857) 5 VOLT SUPPLY CIRCUIT
(K857) 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE
(K602) MFV SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(K900) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE
(Z916) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
MANIFOLD FLOW VALVE
INTAKE MANIFOLD
POWERTRAIN CONTROL MODULE (PCM)
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 ENGINE - STANDARD PROCEDURE)
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Diagnostic Test
1. DTC IS ACTIVE
Turn the ignition on.
With the scan tool, clear DTCs.
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.
With the scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
Go to 2
Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 ENGINE - DIAGNOSIS AND TESTING)
No
2. (K857) 5 VOLT SUPPLY CIRCUIT VOLTAGE
Turn the ignition off.
Disconnect the Manifold Flow Valve connector.
Turn the ignition on.
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
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No
Go to 3
3. (K857) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the Powertrain Control Module (PCM)
connector.
Turn the ignition on.
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 Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
Go to 4
No
4. (K857) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
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
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No
Repair the (K857) 5 Volt Supply circuit for a short to ground.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
5. (K857) 5 VOLT SUPPLY CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT
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
Repair the (K857) 5 Volt Supply circuit for a short to the (K900) Sensor Ground circuit.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
No
6. (K857) 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE
Measure the resistance of the (K857) 5 Volt Supply
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
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No
Repair the (K857) 5 Volt Supply circuit for an open circuit or high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
7. (K602) MFV SIGNAL CIRCUIT VOLTAGE
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 to12
Go to 8
No
8. (K602) MFV SIGNAL CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the Powertrain Control Module (PCM)
connector.
Turn the ignition on.
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 Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
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No
Go to 9
9. (K602) MFV SIGNAL CIRCUIT SHORTED TO GROUND
Turn the ignition off.
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
Repair the (K602) MFV Signal circuit for a short to ground.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
No
10. (K602) MFV SIGNAL CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT
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
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Repair the (K602) MFV Signal circuit for a short to the (K900) Sensor Ground circuit.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
11. (K602) MFV SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
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
Repair the (K602) MFV Signal circuit for an
open circuit or high resistance.
Perform the PCM Verification Test Ver. 1
(Refer to 9 - ENGINE - STANDARD
PROCEDURE).
No
12. (K900) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE
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
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No
Repair the (K900) Sensor Ground circuit for an open circuit or high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
13. (K602) MFV SIGNAL CIRCUIT SHORTED TO THE (K857) 5 VOLT SUPPLY
CIRCUIT
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 Ver. 1
(Refer to 9 - ENGINE - STANDARD
PROCEDURE).
Go to 14
No
14. (Z916) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
Using a 12 volt test light connected to 12 volts,
check the (Z916) 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?
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Yes
Go to 15
Repair the (Z916) Ground circuit for an open circuit or high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
No
15. MANIFOLD FLOW VALVE
Turn the ignition off.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Manifold
Flow Valve and the Powertrain Control Module (PCM).
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out or corroded terminals.
Refer to any Technical Service Bulletins that may apply.
Remove the Manifold Flow Valve.
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 Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
Replace the Manifold Flow Valve in accordance with the Service Information.
No
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Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
16. POWERTRAIN CONTROL MODULE (PCM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Manifold
Flow Valve and the Powertrain Control Module (PCM).
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out or corroded terminals.
Refer to any Technical Service Bulletins that may apply.
Were any problems found?
Yes
Repair as necessary.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
No
Replace and program the Powertrain Control Module (PCM) in accordance with the Service
Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
file://D:\en_US\y2008\mk\si\xml\7c035ff3.xml
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