Pinpoint Test AE: Unable to Activate Self Test/Network Communication Error: 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:

unable to communicate with the PCM
unable to activate the PCM self-test
harness circuits VPWR, ISP-R, PCMRC and PWRGND

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

Courtesy of FORD MOTOR CO.

Pin	Circuit
4	SIGRTN (Signal Return)
6	VREF (Reference Voltage)

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

Courtesy of FORD MOTOR CO.

Pin	Circuit
70, 71, 72, 73, 74	PWRGND (Power Ground)
67, 68, 69	VPWR (Vehicle Power)
38	PCMRC (PCM Relay Control)
42	ISP-R (Ignition Switch Position Run)