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HOMESERVICE MANUALSFORD2021EDGE SE, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 500 (ENGINE CONTROLS - PINPOINT TESTS (DIESEL))PINPOINT TESTS RH: REDUCTANT HEATERINTRODUCTION
2021 Ford Edge SE, 4WD

Pinpoint Tests RH: Reductant Heater: Introduction

2021 Ford Edge SE, 4WDSECTION Introduction
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2022 Ford F-550 Super Duty, 2022 Ford F-450 Super Duty, 2022 Ford F-350 Super Duty, 2022 Ford F-250 Super Duty, and 2021 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
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
G12083819Courtesy 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
G12083820Courtesy of FORD MOTOR CO.
Pin Circuit
30 RDHTRCTRL (Reductant Heater Control)
Fig 3: Battery Junction Box-I (BJB-I) Connector
G12083819Courtesy of FORD MOTOR CO.
Pin Circuit
50 RDHTRPWR (Reductant Heater Power)
35 GND (Ground)
Fig 4: Reductant Pump Assembly Connector
G10769237Courtesy of FORD MOTOR CO.
Pin Circuit
11 GND (Ground)
9 RDHTRC1 (Reductant Heater Control 1)
Fig 5: Reductant Pressure Line Heater Assembly Connector
G07432398Courtesy 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
G13711705Courtesy 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
G13711706Courtesy 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
G06054185Courtesy of FORD MOTOR CO.
Pin Circuit
5 VPWR (Vehicle Power)
1, 3 B+ (Battery Positive Voltage)
Fig 9: Reductant Dosage Control Module Connector
G10769234Courtesy 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)
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.