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DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSFORD2021EXPEDITION PLATINUM, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 763 (ENGINE CONTROLS - PINPOINT TEST HC: FUEL DELIVERY SYSTEM THROUGH PINPOINT TEST JC: SECONDARY IGNITION (COIL PACK) - (EXCEPT DIESEL & HYBRID))PINPOINT TEST HU: INTAKE AIR SYSTEMSINTRODUCTION

2021 Ford Expedition Platinum, RWD

PINPOINT TEST HU: Intake Air Systems: Introduction

2021 Ford Expedition Platinum, RWDSECTION Introduction

WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 2019 Lincoln Navigator, 2019 Lincoln Nautilus, 2019 Lincoln MKZ, 2019 Lincoln MKT, and 2019 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.

This pinpoint test is intended to diagnose the following:

air cleaner assembly (including air cleaner element) (9600)
air inlet tube (9F843)
clean air tube hose and resonator (9R504) and (9F593)
intake manifold runner control bank 1 (IMRC1) solenoid (9J559)
intake manifold runner control bank 2 (IMRC2) solenoid (9J559)
intake manifold runner control bank 1 (IMRC1) sensor (9P471)
intake manifold runner control bank 2 (IMRC2) sensor (9P471)
intake manifold tuning valve (IMTV) (9L490)
IMTV electric actuator assembly (9L490)
throttle body assembly (9E926)
harness circuits: IMRC, IMRC1, IMRC1A, IMRC2, IMRC2A, IMTV, SIGRTN, VPWR and VREF
PCM (12A650)

Fig 1: Intake Manifold Runner Control Bank 1 (IMRC1) Solenoid Connector

Courtesy of FORD MOTOR CO.

Harness Side

Circuit	Pin
IMRC1A (Intake Manifold Runner Control Bank 1 Actuator)	2
VPWR (Vehicle Power)	1

Fig 2: Intake Manifold Runner Control Bank 1 (IMRC1) Sensor Connector

Courtesy of FORD MOTOR CO.

Harness Side

Circuit	Pin
VREF (Reference Voltage)	2
IMRC1 (Intake Manifold Runner Control Bank 1)	1
SIGRTN (Signal Return)	3

Fig 3: Intake Manifold Runner Control Bank 2 (IMRC2) Solenoid Connector

Courtesy of FORD MOTOR CO.

Harness Side

Circuit	Pin
IMRC2A (Intake Manifold Runner Control Bank 2 Actuator)	2
VPWR (Vehicle Power)	1

Fig 4: Intake Manifold Runner Control Bank 2 (IMRC2) Sensor Connector

Courtesy of FORD MOTOR CO.

Harness Side

Circuit	Pin
VREF (Reference Voltage)	2
IMRC2 (Intake Manifold Runner Control Bank 2)	1
SIGRTN (Signal Return)	3

Fig 5: Powertrain Control Module (PCM) Connector - For PCM Connector Views

Courtesy of FORD MOTOR CO.

Harness Side

Circuit

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.