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: DPFE, SIGRTN, EVR, VPWR and VREF
- 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 SECTION 6: REFERENCE VALUES .
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| E-Series | 190-PIN | E21 E64 E63 E64 E48 |
EVR SIGRTN VREF SIGRTN DPFE |
| Mustang | 190-PIN | E35 E32 B40, E20 E32 E21 |
EVR SIGRTN VREF SIGRTN DPFE |