Pinpoint Test Dc: Mass Air Flow (MAF) Sensor: Introduction
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
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| E-Series 4.6L, E-Series 5.4L, Escape/Mariner, Expedition, F-150, Focus, Navigator |
190-Pin | B40 B41 |
MAF MAF RTN |
| Edge, Flex, MKS, MKX, Sable, Taurus, Taurus X |
190-Pin | B41 B42 |
MAF MAF RTN |
| Fusion, Milan, MKZ |
140 Pin | B41 B42 |
MAF MAF RTN |
| All other vehicles | 170 Pin | E25 E26 |
MAF MAF RTN |