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 500 (ENGINE CONTROLS - PINPOINT TESTS (DIESEL))PINPOINT TESTS AE: UNABLE TO ACTIVATE SELF TEST/NETWORK COMMUNICATION ERRORINTRODUCTION
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD
Pinpoint Tests AE: Unable To Activate Self Test/Network Communication Error: 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 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:
- unable to communicate with the PCM
- unable to activate the PCM self-test
- harness circuits VPWR, ISP-R, PCMRC and PWRGND
| Pin | Circuit |
|---|---|
| 3 | VREF (Reference Voltage) |
| 2 | SIGRTN (Signal Return) |
| Pin | Circuit |
|---|---|
| 4 | SIGRTN (Signal Return) |
| 2 | VREF (Reference Voltage) |
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| F-150 | A | 47, 61, 62, 76, 77 67, 68, 69 50 21 |
PWRGND VPWR PCMRC ISP-R |
| Transit Connect | B | 96, 97, 98 101, 102, 103 42 82 |
PWRGND VPWR PCMRC ISP-R |
| All other vehicles | A | 47, 61, 62, 76, 77 1, 16, 17, 2 50 21 |
PWRGND VPWR PCMRC ISP-R |
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.