PINPOINT TEST HD: Misfire Detection Monitor: 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.
WARNING:
Crown Victoria Police Interceptor vehicles equipped with fire suppression system, refer to part 419-03 for Important Safety Warnings. Failure to follow these instructions may result in personal injury.
NOTE:
Mechanical noise caused by the front end accessory drive components, mechanically driven cooling fans, or rough roads at high RPM with light load conditions may produce a nonsymmetrical loss of cylinder acceleration, which may result in a misfire.
This pinpoint test is intended to diagnose the misfire detection monitor.
Clearing the powertrain control module (PCM) diagnostic trouble codes (DTCs) erases any PCM recorded freeze frame data. Make sure to record any PCM freeze frame information before proceeding. Refer toFREEZE FRAME DATA .
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Edge, Expedition, F-150 4.6L, F-150 5.4L, Mark LT, MKX, MKZ, Navigator, Sable, Taurus, Taurus X |
A | 2 | CMP |
| Escape/Mariner 2.3L, Ranger 2.3L |
B | 1 2 |
SIGRTN CMP |
| Explorer 4.0L, Explorer Sport Trac 4.0L, Mountaineer 4.0L, Mustang 4.0L, Ranger 4.0L |
C | 2 1 |
SIGRTN CMP |
| Fusion 2.3L, Milan 2.3L |
D | 3 2 |
SIGRTN CMP |
| Fusion 3.0L, Milan 3.0L |
E | 1 | CMP |
| F-150 4.2L | D | 2 3 1 |
CMP PWRGND VPWR |
| Focus | F | 3 2 |
SIGRTN CMP |
| All other vehicles | A | 1 2 |
SIGRTN CMP |