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: Reductant Pump Assembly Connector

Courtesy of FORD MOTOR CO.

Harness Side

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

Fig 2: Reductant Pressure Line Heater Assembly Connector

Courtesy of FORD MOTOR CO.

Harness Side

Circuit	Pin
RDHTRC2 (Reductant Heater Control 2)	1
GND (Ground)	2

Fig 3: Reductant Heater Relay Connector

Courtesy of FORD MOTOR CO.

Harness Side

Circuit	Pin
B+ (Battery Positive Voltage)	3
GND (Ground)	2
RDHTRPWR (Reductant Heater Power)	5
RDHTRCTRL (Reductant Heater Control)	1

Fig 4: Reductant Quality Module Connector

Courtesy of FORD MOTOR CO.

Harness Side

Circuit	Pin
GND (Ground)	1

Fig 5: Glow Plug Control Module-C (GPCM-C) Connector

Courtesy of FORD MOTOR CO.

Harness Side

Circuit	Pin
RDHTRPWR (Reductant Heater Power)	16
RDHTRCTRL (Reductant Heater Control)	2
RDHTRC1 (Reductant Heater Control 1)	15
RDHTRC2 (Reductant Heater Control 2)	13