Pinpoint Tests RH: Reductant Heater: Introduction

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:

reductant heaters
harness circuits: GND, RDHTRC1, RDHTRC2, RDHTRC3 and RDHTRPWR
glow plug control module (GPCM)
reductant dosage control module (5H298)

Fig 1: Battery Junction Box-B (BJB-B) Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
F-150	A	42	GND
F-Series Super Duty	A	48 28 39	RDHTRPWR RDHTRCTRL GND

Fig 2: Battery Junction Box-H (BJB-H) Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
30	RDHTRCTRL (Reductant Heater Control)

Fig 3: Battery Junction Box-I (BJB-I) Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
50	RDHTRPWR (Reductant Heater Power)
35	GND (Ground)

Fig 4: Reductant Pump Assembly Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
11	GND (Ground)
9	RDHTRC1 (Reductant Heater Control 1)

Fig 5: Reductant Pressure Line Heater Assembly Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Transit Connect	A	1 2	GND RDHTRC2
All other vehicles	A	2 1	GND RDHTRC2

Fig 6: Reductant Quality Module Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
F-650/F-750, F-150, F-Series Super Duty	A	1	GND
Transit Connect	B	2 1	GND RDHTRC1

Fig 7: Glow Plug Control Module-B (GPCM-B) Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
22	RDHTRC2 (Reductant Heater Control 2)
1	RDHTRC1 (Reductant Heater Control 1)
14	RDHTRPWR (Reductant Heater Power)
28	RDHTRCTRL (Reductant Heater Control)

Fig 8: Reductant Dosage Control Module Relay Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
5	VPWR (Vehicle Power)
1,	3 B+ (Battery Positive Voltage)

Fig 9: Reductant Dosage Control Module Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
6	RDHTRC2 (Reductant Heater Control 2)
2	RDHTRC1 (Reductant Heater Control 1)
1, 3, 5	VPWR (Vehicle Power)
89	RDCMRC (Reductant Dosage Control Module Relay Control)