PINPOINT TEST HH: Exhaust Gas Recirculation System Module (ESM): Introduction
WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 2007 Mercury Mountaineer, 2007 Mercury Monterey, 2007 Mercury Montego, 2007 Mercury Milan, and 2007 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
This pinpoint test is intended to diagnose the following:
- ESM (9Y456)
- orifice tube assembly (9D477)
- differential pressure feedback exhaust gas recirculation (EGR) sensor pressure hoses
- vacuum lines
- harness circuits: VREF, DPFE, SIGRTN, EVR, VPWR and VREF
- powertrain control module (PCM) (12A650)
| Pin | Circuit |
|---|---|
| 1 | EVR (EGR Vacuum Regulator) |
| 4 | VPWR (Vehicle Power) |
| 6 | SIGRTN (Signal Return) |
| 5 | DPFE (Differential Pressure Feedback EGR) |
| 2 | VREF (Reference Voltage) |
Powertrain Control Module (PCM) Connector
For PCM connector views or reference values, refer to the REFERENCE VALUES article.
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| E-Series | 170 Pin | E63 E58 E57 E58 E21 |
EVR SIGRTN VREF SIGRTN DPFE |
| F-150 | 190 Pin | E63 E58 B29, E57 B58, E58, T43 E21 |
EVR SIGRTN VREF SIGRTN DPFE |
| Five Hundred, Freestyle, Montego |
150 (50-50-50) Pin | E6 E41 E40 B41, E41 E44 |
EVR SIGRTN VREF SIGRTN DPFE |
| Freestar/Monterey | 104 Pin | 47 91 90 91 65 |
EVR SIGRTN VREF SIGRTN DPFE |
| Mustang | 170 Pin | E63 E58 B40, E57 B41, E58, T41 E21 |
EVR SIGRTN VREF SIGRTN DPFE |
| All other vehicles | 170 Pin | E63 E58 E57 B41, E58, T41 E21 |
EVR SIGRTN VREF SIGRTN DPFE |