PINPOINT TEST HE: Exhaust Gas Recirculation (EGR) Systems: 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:

differential pressure feedback exhaust gas recirculation (EGR) sensor (9J460)
EGR valve (9D460) (9D475)
EGR vacuum regulator solenoid (9J459)
orifice tube assembly (9D477)
differential pressure feedback EGR sensor pressure hoses
vacuum lines
harness circuits: VREF, DPFE, SIGRTN, EVR, VPWR, VREF and PWRGND
powertrain control module (PCM) (12A650)

Fig 1: Differential Pressure Feedback EGR Sensor Connector - A

Courtesy of FORD MOTOR CO.

Fig 2: Differential Pressure Feedback EGR Sensor Connector - B

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Vehicles equipped with a tube mounted differential pressure feedback EGR sensor	A	3 2 1	DPFE SIGRTN VREF
All other vehicles	B	1 2 3	DPFE SIGRTN VREF

Fig 3: EGR Vacuum Regulator Solenoid Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
2	EVR (EGR Vacuum Regulator)
1	VPWR (Vehicle Power)

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

Vehicle	Connector	Pin	Circuit
Escape/Mariner	150 (50-50-50) Pin	B47 E27 E40 E41 E44	PWRGND EVR VREF SIGRTN DPFE
Ranger	170 Pin	B47 E63 E57 E58 E21	PWRGND EVR VREF SIGRTN DPFE