PINPOINT TEST DM: Manifold Absolute Pressure (MAP) Sensor: Introduction

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.

This pinpoint test is intended to diagnose the following:

manifold absolute pressure (MAP) sensor (9F479)
harness circuits: MAP, SIGRTN, VREF
powertrain control module (PCM) (12A650)

Fig 1: Manifold Absolute Pressure (MAP) Sensor Connector - A

Courtesy of FORD MOTOR CO.

Fig 2: Manifold Absolute Pressure (MAP) Sensor Connector - B

Courtesy of FORD MOTOR CO.

Fig 3: Manifold Absolute Pressure (MAP) Sensor Connector - C

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Escape/Mariner 3.0L	A	2 3 1	MAP SIGRTN VREF
Fusion 3.0L, Milan 3.0L	B	1 2 3	MAP SIGRTN VREF
All other vehicles	C	1 4 2	MAP SIGRTN VREF

Fig 4: EGR System Module (ESM) Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
4	VPWR (Vehicle Power)
3	MAP (Manifold Absolute Pressure)
6	SIGRTN (Signal Return)
2	VREF (Reference Voltage)

For PCM connector views or reference values, refer to the REFERENCE VALUES article.

Vehicle	Connector	Pin	Circuit
Escape/Mariner	150 (50-50-50) Pin	B35, B36 B40, E40 B41, E41, T41 E23	VPWR VREF SIGRTN MAP
F-150	190 Pin	B51, B52, B53 B29, E57 B58, E58, T43 E62	VPWR VREF SIGRTN MAP
Focus	190 Pin	B67, B68 B52, B66, E63 B58, E64, T40 E40	VPWR VREF SIGRTN MAP
Fusion, Milan	140 Pin	B51, B52 B33, E57 B58, E58 E62	VPWR VREF SIGRTN MAP
All other vehicles	170 Pin	B35, B36 B40, E57 B41, E58, T41 E62	VPWR VREF SIGRTN MAP