Pinpoint Test AN: Auxiliary Powertrain Control System: Introduction: Description

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NOTE: Functions may not be available if the operator has deprogrammed them.

The APCM system provides an operator interface to the drive-by-wire powertrain control system to affect charge protection, engine RPM and manual throttle control between 1,300 and 2,500 rpm.

The following entry conditions/input signals are required to enable the APCM:

parking brake set
the automatic transmission in PARK or manual transmission in NEUTRAL with the clutch pedal released
brake pedal position (BPP)
accelerator pedal
hi-mount stoplamp (APCM operation with hazard lamps)

Fig 1: Identifying APCM Connector Terminals (E-Series)
Courtesy of FORD MOTOR CO.

Fig 2: Identifying APCM Connector Terminals (F Superduty)
Courtesy of FORD MOTOR CO.

Fig 3: Identifying Data Link Connector Terminals
Courtesy of FORD MOTOR CO.

The following error codes are displayed from the APCM only:

CErr indicates that one or both BUS circuits are open or shorted.
CrSd indicates a fault on BUS circuits or internal APCM fault.
EErr and AErr both indicate an internal APCM fault.

Follow the direction given below to aid in diagnosing the APCM fault condition:

If APCM does not work at all, Go to AN1.
If APCM does not work with hazard flashers, Go to AN7.
If APCM error code CErr or CrSd are displayed, Go to AN5.
If APCM error code EErr or AErr are displayed, install a new APCM.