PINPOINT TEST DC: Mass Airflow (MAF) Sensor: Introduction
WARNING: This page does not describe the selected car, but rather 22 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:
- mass airflow (MAF) sensor (12B579)
- harness circuits: MAF SIG, MAF RTN, vehicle power (VPWR), power ground (PWRGND), IAT and SIGRTN
- powertrain control module (PCM) (12A650)
Powertrain Control Module (PCM) Connector
For PCM connector views or reference values, refer to REFERENCE VALUES .
POWERTRAIN CONTROL MODULE CONNECTOR PINS REFERENCE CHART
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Crown Victoria, E-Series 6.8L, Grand Marquis, Ranger, Town Car | 170 PIN | E26 E25 |
MAF RTN MAF |
| F-150 6.2L, F-150 5.0L | 190-PIN | B2 B40 |
MAF RTN MAF |
| F-150 3.5L | 198 PIN | B9 | SIGRTN |
| F-Series Super Duty, Mustang 5.4L, Mustang 5.0L |
190-PIN | B2 B40 |
SIGRTN MAF |
| Fiesta | 128 PIN | E1 E37 |
MAF RTN MAF |
| Flex, MKS, MKT, Taurus | 190-PIN | B42 B41 |
MAF RTN MAF |
| Fusion 3.5L, MKZ | 140 PIN | B42 B41 |
MAF RTN MAF |
| Mustang 3.7L | 190-PIN | B41 B40 |
SIGRTN MAF |
| All other vehicles | 190-PIN | B41 B40 |
MAF RTN MAF |