Pinpoint Test B: Powertrain Control Module (Pcm) Power Relay: Introduction

WARNING: THIS VEHICLE IS EQUIPPED WITH HIGH VOLTAGE CABLES, COMPONENTS, AND WIRING. THE HIGH VOLTAGE WARNING LABELS CONTAINING THE HIGH VOLTAGE SYMBOL ARE LOCATED ON EACH HIGH VOLTAGE COMPONENT. HIGH VOLTAGE CABLES AND WIRING ARE ORANGE IN COLOR. CERTIFIED RUBBER INSULATING GLOVES AND A FACE SHIELD MUST BE WORN WHEN WORKING WITH THE HIGH VOLTAGE CABLES, COMPONENTS, OR WIRING. THE IGNITION KEY MUST BE CYCLED TO THE OFF POSITION FOR A MINIMUM OF 5 MINUTES, AND THE HIGH VOLTAGE TRACTION BATTERY SERVICE DISCONNECT PLUG PLACED IN THE SERVICING/SHIPPING POSITION BEFORE DISCONNECTING THE HIGH VOLTAGE CABLES. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY OR DEATH.

This pinpoint test is intended to diagnose the following:

harness circuits: B+, IGN START/RUN, INJPWRM, ISP-R, ISP-R/S, PCMRC and VPWR
PCM power relay (12A646)
PCM (12A650)

Fig 1: Fuel Injector Connector

Courtesy of FORD MOTOR CO.

FUEL INJECTOR CONNECTOR PIN REFERENCE CHART

Pin	Circuit
2	IGN START/RUN (Ignition START/RUN)

Fig 2: Powertrain Control Module Power (PCM Power) Relay Connector

Courtesy of FORD MOTOR CO.

POWERTRAIN CONTROL MODULE POWER (PCM POWER) RELAY CONNECTOR PIN REFERENCE CHART

Pin	Circuit
5	VPWR (Vehicle Power)
2	PCMRC (PCM Relay Control)
1, 3	B+ (Battery Positive Voltage)

Fig 3: SJB-A Connector

Courtesy of FORD MOTOR CO.

SJB-A CONNECTOR PIN REFERENCE CHART

Pin	Circuit
3	ISP-R (Ignition Switch Position Run)

Fig 4: Powertrain Control Module (PCM) Connector

Courtesy of FORD MOTOR CO.

POWERTRAIN CONTROL MODULE (PCM) CONNECTOR PIN REFERENCE CHART

Pin	Circuit
B67, B68	VPWR (Vehicle Power)
B21	INJPWRM (Injector Power Monitor)
B39	ISP-R/S (Ignition Run/Start Input)
B38	PCMRC (PCM Relay Control)
B42	ISP-R (Ignition Switch Position Run)