Pinpoint Tests AJ: Powertrain Control Module (PCM) Power Relay: 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: B+, ISP-R, PCMRC, VPWR and PWRGND
PCM power relay (12A646)

PCM (12A650)

Fig 1: Identifying PCM Power Relay Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Transit	A	5 2 1, 3	VPWR PCMRC B+
All other vehicles	A	5 1 2, 3	VPWR PCMRC B+

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

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Transit	A	2, 3, 42, 53, 7 17, 29, 5 39 48	PWRGND VPWR ISP-R PCMRC
All other vehicles	B	70, 71, 72, 73, 74 67, 68, 69 42 38	PWRGND VPWR ISP-R PCMRC