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 RG: REDUCTANT PUMPINTRODUCTION
2018 Ford F-450 Super Duty Lariat, 4D Pickup Crew Cab, 4WD
Pinpoint Tests RG: REDUCTANT Pump: Introduction
2018 Ford F-450 Super Duty Lariat, 4D Pickup Crew Cab, 4WDSECTION 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 pump
- reductant pump control module
- harness circuits: RDPAP, RDPBP, RDPC, RDPCP, RDPGND, RDPM and VPWR
- reductant dosage control module (5H298)
- PCM (12A650)
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Transit | A | 3 1 4 5 |
VPWR GND GND RDPC |
| All other vehicles | B | 16 8 7 11 15 |
RDPCP RDPBP RDPAP GND GND |
| Pin | Circuit |
|---|---|
| 7 | RDPCP (Reductant Pump C Phase) |
| 2 | RDPBP (Reductant Pump B Phase) |
| 6 | RDPAP (Reductant Pump A Phase) |
| 3 | RDPM (Reductant Pump Monitor) |
| 4 | RDPC (Reductant Pump Control) |
| 1 | GND (Ground) |
| 5 | VPWR (Vehicle Power) |
| Pin | Circuit |
|---|---|
| 69 | RDPGND (Reductant Pump Ground) |
| 93 | RDPC (Reductant Pump Control) |
| Pin | Circuit |
|---|---|
| 29 | RDPM (Reductant Pump Monitor) |
| 23 | RDPC (Reductant Pump 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.