PINPOINT TEST HH: Exhaust Gas Recirculation System Module (ESM): Introduction

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.

This pinpoint test is intended to diagnose the following:

ESM (9Y456)
orifice tube assembly (9D477)
differential pressure feedback exhaust gas recirculation (EGR) sensor pressure hoses
vacuum lines
harness circuits: DPFE, SIGRTN, EVR, VPWR and VREF
powertrain control module (PCM) (12A650)

Fig 1: Identifying EGR System Module (ESM) Connector
Courtesy of FORD MOTOR CO.

Powertrain Control Module (PCM) Connector

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

POWERTRAIN CONTROL MODULE (PCM) CONNECTOR PINS REFERENCE CHART

Vehicle	Connector	Pin	Circuit
E-Series	190-PIN	E21 E64 E63 E64 E48	EVR SIGRTN VREF SIGRTN DPFE
Mustang	190-PIN	E63 E32 B40, E20 E32 E21	EVR SIGRTN VREF SIGRTN DPFE
All other vehicles	170 PIN	E63 E58 E57 B41, E58, T41 E21	EVR SIGRTN VREF SIGRTN DPFE