Pinpoint Tests AF: Glow Plug System: Introduction

NOTE: The wait-to-start indicator ON time is independent from the glow plug control module (GPCM).

NOTE: Make sure that the vehicle batteries are fully charged prior to carrying out the glow plug monitor self-test.

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: glow plug, CAN2+, CAN2-, PWRGND, VBATT, and VPWR
glow plugs
GPCM

Fig 1: Identifying Glow Plug Control Module-A (GPCM-A) Connector
Courtesy of FORD MOTOR CO.

Fig 2: Identifying Glow Plug Control Module-B (GPCM-B) Connector
Courtesy of FORD MOTOR CO.

Fig 3: Identifying Glow Plug Control Module-C (GPCM-C) Connector
Courtesy of FORD MOTOR CO.

Fig 4: Identifying Powertrain Control Module-B (PCM-B) Connector
Courtesy of FORD MOTOR CO.