Pinpoint Tests AH: Cooling Fan: Introduction
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2019 Ford Transit-350 HD, 2019 Ford Transit-350, 2019 Ford Transit-250, 2019 Ford Transit-150, and 2019 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Do not operate the engine with the hood open until the fan blade has been examined for possible cracks and separation. A damaged fan can separate during operation. Failure to follow this instruction may result in serious personal injury.
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:
- cooling fan (8600)
- cooling fan clutch (8A616)
- fan speed sensor (FSS) (8A616)
- fan control (FC1, FC2) relays
- harness circuits
- PCM (12A650)
Harness Side
| Circuit | Pin |
|---|---|
| VBPWR (Vehicle Buffered Power) | 2 |
| GND (Ground) | 5 |
| FSS (Fan Speed Sensor) | 4 |
| VPWR (Vehicle Power) | 1 |
| FCV (Fan Control Variable) | 6 |
Harness Side
| Circuit | Pin |
|---|---|
| VBPWR (Vehicle Buffered Power) | 1 |
| FSS (Fan Speed Sensor) | 12 |
| FCV (Fan Control Variable) | 34 |