PINPOINT TEST HH: Exhaust Gas Recirculation System Module (ESM): Introduction
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. 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: 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) |
For PCM connector views or reference values, refer to the REFERENCE VALUES article.
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| E-Series, F-Super Duty |
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 |
| 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 |