PINPOINT TEST HH: Exhaust Gas Recirculation System Module (ESM): Introduction
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 |