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 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. 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)
Powertrain Control Module (PCM) Connector
For PCM connector views or reference values, refer to REFERENCE VALUES .
POWERTRAIN CONTROL MODULE (PCM) CONNECTOR PINS REFERENCE CHART
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| E-Series | 190-PIN | E21 E64 E63 E64 E48 |
EVR SIGRTN VREF SIGRTN DPFE |
| Mustang | 190-PIN | E63 E32 B40, E20 E32 E21 |
EVR SIGRTN VREF SIGRTN DPFE |
| All other vehicles | 170 PIN | E63 E58 E57 B41, E58, T41 E21 |
EVR SIGRTN VREF SIGRTN DPFE |