Pinpoint Tests He: Exhaust Gas RECIRCULATION (EGR) Systems: Introduction
WARNING: This page does not describe the selected car, but rather 27 other vehicles, including the 2021 Lincoln Navigator, 2021 Lincoln Nautilus, 2021 Lincoln Corsair, 2021 Lincoln Aviator, and 2021 Ford Transit-350 HD. However, it is still accessible from the selected car via links, so may be relevant.
This pinpoint test is intended to diagnose the following:
- differential pressure feedback exhaust gas recirculation (EGR) sensor (9J460)
- differential pressure feedback EGR sensor pressure hoses
- orifice tube assembly (9D477)
- EGR cooler
- harness circuits: DPFE, SIGRTN and VREF
- PCM (12A650)
| Pin | Circuit |
|---|---|
| 1 | DPFE (Differential Pressure Feedback EGR) |
| 2 | SIGRTN (Signal Return) |
| 3 | VREF (Reference Voltage) |
Powertrain Control Module (PCM) Connector
For PCM connector views or Reference values, Refer to Typical Diagnostic Reference Values.
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Corsair 2.5L, Escape/Kuga 2.5L |
198 PIN | E38 | DPFE |
| Explorer 3.3L, | 306 PIN | E32 | DPFE |
| Transit | |||
| F-150 | 306 PIN | E79 | DPFE |
| All other vehicles | 198 PIN | E37 | DPFE |