Pinpoint Test DC: Mass Air Flow (MAF) Sensor: Introduction
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2010 Mercury Milan, 2010 Mercury Mariner, 2010 Mercury Grand Marquis, 2010 Lincoln Town Car, and 2010 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:
- mass air flow (MAF) sensor (12B579)
- harness circuits: MAF SIG, MAF RTN, vehicle power (VPWR), power ground (PWRGND), IAT and SIGRTN
- powertrain control module (PCM) (12A650)
For PCM connector views or reference values, refer to REFERENCE VALUES .
POWERTRAIN CONTROL MODULE (PCM) CONNECTOR PIN REFERENCE CHART
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Crown Victoria, E-Series 6.8L, Explorer, Explorer SportTrac, F-Series Super Duty, Grand Marquis, Mountaineer, Mustang, Ranger, Town Car |
170 Pin | E25 E26 |
MAF MAF RTN |
| Edge, Flex, MKS, MKT, MKX, Taurus |
190-Pin | B41 B42 |
MAF MAF RTN |
| Fusion 3.5L, MKZ |
140 Pin | B41 B42 |
MAF MAF RTN |
| All other vehicles | 190-Pin | B40 B41 |
MAF MAF RTN |