Pinpoint Tests W: Exhaust Gas Recirculation (EGR) System: Introduction

NOTE: Regeneration may occur during normal operation. During regeneration, diagnostic procedures may display biased values. If a regeneration occurs during diagnostic procedures, allow the process to complete before continuing diagnostics.

This pinpoint test is intended to diagnose the following:

harness circuits: VREF, EGRVCH, EGRVCL, EGR and SIGRTN
EGR valve (9D475)

PCM (12A650)

Fig 1: Identifying Exhaust Gas Recirculation (EGR) Valve Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
1	EGRVCH (Exhaust Gas Recirculation Valve Control High)
5	EGRVCL (Exhaust Gas Recirculation Valve Control Low)
2	EGR (Exhaust Gas Recirculation)
4	SIGRTN (Signal Return)
6	VREF (Reference Voltage)

Fig 2: Identifying Powertrain Control Module-E (PCM-E) Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Transit	A	45	EGRVCH
		46	EGRVCL
		26	EGR
All other vehicles	B	81	EGRVCH
		82	EGRVCL
		61	EGR