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 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-, ISP-R, PWRGND, VBATT, and VPWR
glow plugs (12A342)

GPCM (12B533)

Fig 1: Identifying Glow Plug Control Module-A (GPCM-A) Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Transit	A	1	VBATT
All other vehicles	B	1	VBATT

Fig 2: Identifying Glow Plug Control Module-B (GPCM-B) Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Transit	A	12 2 3 4 5 19 26 10 40	Glow Plug Number 5 Glow Plug Number 4 Glow Plug Number 3 Glow Plug Number 2 Glow Plug Number 1 CAN2- CAN2+ PWRGND ISP-R
All other vehicles	B	12 11 8 7 6 5 2 1	Glow Plug Number 8 Glow Plug Number 7 Glow Plug Number 6 Glow Plug Number 5 Glow Plug Number 4 Glow Plug Number 3 Glow Plug Number 2 Glow Plug Number 1

Fig 3: Identifying Glow Plug Control Module-C (GPCM-C) Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
4	CAN2- (Controller Area Network 2)
3	CAN2+ (Controller Area Network 2)
5	PWRGND (Power Ground)
6	VPWR (Vehicle Power)

Fig 4: Identifying Powertrain Control Module-B (PCM-B) Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
39	CAN2- (Controller Area Network 2)
56	CAN2+ (Controller Area Network 2)

Fig 5: Identifying Powertrain Control Module-T (PCM-T) Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
36	CAN2- (Controller Area Network 2)
35	CAN2+ (Controller Area Network 2)