Pinpoint Tests AJ: Powertrain Control Module (PCM) Power Relay: Introduction

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

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.

Fig 2: Identifying Powertrain Control Module-B (PCM-B) Connector
Courtesy of FORD MOTOR CO.