PINPOINT TEST DC: Mass Air Flow (MAF) Sensor: Introduction
WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 2007 Mercury Mountaineer, 2007 Mercury Monterey, 2007 Mercury Montego, 2007 Mercury Milan, and 2007 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
This pinpoint test is intended to diagnose the following:
- mass air flow sensor (12B579)
- harness circuits: MAF SIG, MAF RTN, vehicle power (VPWR), power ground (PWRGND), IAT and SIGRTN
- powertrain control module (PCM) (12A650)
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Escape 3.0L, Mariner 3.0L |
A | 6 1 4 5 3 2 |
IAT SIGRTN MAF RTN MAF PWRGND VPWR |
| All other vehicles | B | 1 2 4 3 5 6 |
IAT SIGRTN MAF RTN MAF PWRGND VPWR |
Powertrain Control Module (PCM) Connector
For PCM connector views or reference values, refer to the REFERENCE VALUES article.
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Edge, MKX |
190 Pin | B41 B42 |
MAF MAF RTN |
| Escape, Five Hundred, Focus, Freestyle, Mariner, Montego |
150 (50-50-50) Pin | B32 B43 |
MAF MAF RTN |
| Expedition, Fusion, Milan, MKZ, Navigator |
140 Pin | B41 B42 |
MAF MAF RTN |
| F-150, Mark LT |
190 Pin | E25 E26 |
MAF MAF RTN |
| Freestar/Monterey, Taurus |
104 Pin | 88 36 |
MAF MAF RTN |
| All other vehicles | 170 Pin | E25 E26 |
MAF MAF RTN |