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 MANUALSFORD2014F-450 SUPER DUTY PLATINUM, 4WDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - PINPOINT TESTS (DIESEL)PINPOINT TEST AJ: POWERTRAIN CONTROL MODULE (PCM) POWER RELAYINTRODUCTION
2014 Ford F-450 Super Duty Platinum, 4WD
PINPOINT TEST AJ: Powertrain Control Module (PCM) Power Relay: Introduction
2014 Ford F-450 Super Duty Platinum, 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:
- harness circuits: B+, ISP-R, PCMRC, VPWR and PWRGND
- PCM power relay (12A646)
- PCM (12A650)
| Pin | Circuit |
|---|---|
| 5 | VPWR (Vehicle Power) |
| 1 | PCMRC (PCM Relay Control) |
| 2, 3 | B+ (Battery Positive Voltage) |
| Pin | Circuit |
|---|---|
| 70, 71, 72, 73, 74 | PWRGND (Power Ground) |
| 67, 68, 69 | VPWR (Vehicle Power) |
| 42 | ISP-R (Ignition Switch Position Run) |
| 38 | PCMRC (PCM 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.