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 MANUALSFORD2021TRANSIT-350 HD BASE, VAN CARGO EXTENDED, 3.5L ENG VIN 8, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 13 (ENGINE CONTROLS - PINPOINT TESTS (DIESEL))PINPOINT TESTS RL: FUEL VAPORIZER SYSTEMINTRODUCTION
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD
Pinpoint Tests RL: Fuel Vaporizer System: Introduction
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION Introduction
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Ford Transit-350 HD, 2018 Ford Transit-350, 2018 Ford Transit-250, 2018 Ford Transit-150, and 2018 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:
- fuel vaporizer system fuel pump
- fuel vaporizer system glow plug
- harness circuits: GND, VGPPWR, VGPRC, VPC and VPWR
- PCM (12A650)
| Pin | Circuit |
|---|---|
| 2 | VPC (Vaporizer Pump Control) |
| 1 | VPWR (Vehicle Power) |
| Pin | Circuit |
|---|---|
| 1 | GND (Ground) |
| 2 | VGPPWR (Vaporizer Glow Plug Power) |
| Pin | Circuit |
|---|---|
| 5 | VGPPWR (Vaporizer Glow Plug Power) |
| 2 | VGPRC (Vaporizer Glow Plug Relay Control) |
| 1, 3 | VPWR (Vehicle Power) |
| Pin | Circuit |
|---|---|
| 2 | VPC (Vaporizer Pump Control) |
| 26 | VGPRM (Vaporizer Glow Plug Relay Monitor) |
| 28 | VGPRC (Vaporizer Glow Plug Relay Control) |
RENDER: 1.0x
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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.