P2004-INTAKE MANIFOLD RUNNER CONTROL STUCK OPEN

For a complete wiring diagram Refer to Section 8W

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)

Diagnostic Test

1.DTC IS ACTIVE

NOTE: It may be necessary to test drive the vehicle to get this DTC to reset.

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)

2.(K857) 5 VOLT SUPPLY CIRCUIT VOLTAGE

Is the voltage between 4.5 and 5.5 volts?

Yes

Go to 7

Go to 3

3.(K857) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE

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

4.(K857) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND

Is the resistance above 1000 ohms?

Yes

Go to 5

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

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).

6.(K857) 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE

Is the resistance below 5.0 ohms?

Yes

Go to 16

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

Is the voltage between 4.5 and 5.5 volts?

Yes

Go to12

Go to 8

8.(K602) MFV SIGNAL CIRCUIT SHORTED TO VOLTAGE

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).

Go to 9

9.(K602) MFV SIGNAL CIRCUIT SHORTED TO GROUND

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).

10.(K602) MFV SIGNAL CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT

Is the resistance above 100 ohms?

Yes

Go to 11

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

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).

12.(K900) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE

Is the resistance below 5.0 ohms?

Yes

Go to 13

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

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

14.(Z916) GROUND CIRCUIT OPEN OR HIGH RESISTANCE

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

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).

15.MANIFOLD FLOW VALVE

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.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

16.POWERTRAIN CONTROL MODULE (PCM)

Were any problems found?

Yes

Repair as necessary.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

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).