Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2018F-450 SUPER DUTY LARIAT, 4D PICKUP CREW CAB, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - PINPOINT TESTS (DIESEL)PINPOINT TESTS RM: REDUCTANT DOSAGE CONTROL MODULEINTRODUCTION
2018 Ford F-450 Super Duty Lariat, 4D Pickup Crew Cab, 4WD
Pinpoint Tests Rm: REDUCTANT Dosage Control Module: Introduction
2018 Ford F-450 Super Duty Lariat, 4D Pickup Crew Cab, 4WDSECTION Introduction
This pinpoint test is intended to diagnose the following:
- communication concerns
- harness circuits: B+, PWRGND, RDCMRC and VPWR
- reductant dosage control module (5H298)
| Pin | Circuit |
|---|---|
| 29, 7 | PWRGND (Power Ground) |
| 1, 3, 5, 51, 73 | VPWR (Vehicle Power) |
| 28 | RDCMRC (Reductant Dosage Control Module Relay Control) |
| Pin | Circuit |
|---|---|
| 5 | VPWR (Vehicle Power) |
| 2 | RDCMRC (Reductant Dosage Control Module Relay Control) |
| 1, 3 | B+ (Battery Positive Voltage) |
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.