Pinpoint Test HH: Exhaust Gas RECIRCULATION System Module (ESM): Introduction
WARNING: This page does not describe the selected car, but rather 24 other vehicles, including the 2009 Mercury Mountaineer, 2009 Mercury Milan, 2009 Mercury Mariner, 2009 Lincoln Town Car, and 2009 Lincoln MKZ. 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)
For PCM connector views or reference values, refer to REFERENCE VALUES .
POWERTRAIN CONTROL MODULE (PCM) CONNECTOR
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| E-Series | 190-Pin | E21 E64 E63 E64 E48 |
EVR SIGRTN VREF SIGRTN DPFE |
| F-150 | 190-Pin | E63 E64 B52, E63 B58, E64, T43 E21 |
EVR SIGRTN VREF SIGRTN DPFE |
| F-Super Duty | 170 Pin | E63 E58 E57 E58 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 |