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This code is present when the intake manifold runner control actuator is bad.
1. At the Intake Manifold Runner Control (IMRC) actuator, check for battery voltage on the Red/Light Green (RD/LG) wire and ground on the Gray/Red (GY/RD) wire. Repair either circuit as needed.
2. If the power and ground are OK, monitor the voltage on the Brown (BN) and White/Red (WH/RD) wires with a Digital Volt-Ohm Meter (DVOM) on each. At idle, the BN wire should show close to battery voltage, the WH/RD wire should show about 2.5-5v.
3. Raise the engine
RPM to about 3500 and recheck the readings. The BN wire should be less than 1v (indicating the PCM is grounding it), the IMRC actuator should actuate, and the voltage on the WH/RD should also drop to less than about 1v. If the BN wire is being grounded by the Powertrain Control Module (PCM) as it should and either the IMRC actuator does not operate or the voltage on the WH/RD wire doesn't drop, check for any binding in the linkage and replace the actuator as needed.
The Intake Manifold Runner Control (IMRC)
Electric Actuated system consists of a remote mounted motorized actuator with an attaching cable for each housing on each bank. Some applications will use one cable for both banks. The cable or linkage attaches to the housing butterfly plate levers. The 2.0L (2V) Focus/Escort IMRC uses a motorized actuator mounted directly to a single housing without the use of a cable. Each IMRC housing is an aluminum casting with two intake air passages for each cylinder. One passage is always open and the other is opened and closed with a butterfly valve plate. The housing uses a return spring to hold the butterfly valve plates closed. The motorized actuator houses an internal switch or switches, depending on the application, to provide feedback to the PCM indicating cable and butterfly valve plate position.
Below approximately 3000 rpm
, the motorized actuator will not be energized. This will allow the cable to fully extend and the butterfly valve plates to remain closed. Above approximately 3000 rpm
, the motorized actuator will be energized. The attaching cable will pull the butterfly valve plates into the open position. Some vehicles will activate the IMRC near 1500 rpm
. WARNING: SUBSTANTIAL OPENING AND CLOSING TORQUE IS APPLIED BY THIS SYSTEM. TO PREVENT INJURY, BE CAREFUL TO KEEP FINGERS AWAY FROM LEVER MECHANISMS WHEN ACTUATED. Special Service Tool(s) Removal
- WARNING: Fuel supply lines will remain pressurized for long periods of time after engine shut down. This pressure must be relieved before disconnecting any fuel lines or fuel system components. Relieve the fuel pressure.
- Use Disconnect Tool or equivalent and disconnect the fuel supply line from the fuel injection supply manifold rail.
- Disconnect the intake manifold runner control (IMRC) actuator electrical connector.
- Remove the intake manifold.
- Disconnect the four fuel injector electrical connectors.
- Remove the intake manifold runner control (IMRC).
- Remove the two bolts and remove the fuel injection supply manifold, if necessary.
- Remove the three bolts and remove the IMRC actuator, if necessary.
- Install the IMRC actuator, if necessary.