Pinpoint Test 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: RDHTRC1, RDHTRC2, and RDHTRPWR
glow plug control module (GPCM)

Fig 1: Identifying Reductant Heater And Sender Assembly Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
2	GND (Ground)
1	RDHTRC1 (Reductant Heater Control 1)

Fig 2: Identifying Reductant Pump Assembly Connector

Courtesy of FORD MOTOR CO.

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

Fig 3: Identifying Reductant Pressure Line Heater Assembly Connector

Courtesy of FORD MOTOR CO.

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

Fig 4: Identifying Reductant Heater Relay Connector

Courtesy of FORD MOTOR CO.

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

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

Courtesy of FORD MOTOR CO.

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