Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Tests DC: Mass Air Flow (MAF) Sensor

NOTE
This Pinpoint Test is intended to diagnose the following:
- Mass Air Flow (MAF) Sensor
- Harness Circuits: MAF SIG, MAF RTN, Vehicle Power (VPWR), Power Ground (PWR GND), IAT and SIG RTN
- Powertrain Control Module (PCM)

Pinpoint Test Schematics and Connectors

Focus, Contour/Mystique, Cougar (MAF):

Escort (4V), Taurus/Sable, FF Taurus, Windstar, Explorer/Mountaineer, Econoline, Excursion, 5.4L/6.8L F250/F350/F450 (MAF):

LS6/LS8 (MAF):

All Others (MAF):

Escort (4V), Windstar, Econoline (MAF Extension):

Mustang (MAF Extension):

Escort (2V), 4.2L/4.6L/5.4L F150, Expedition/Navigator (MAF Extension):

Continental (MAF Extension):

Ranger (MAF Extension):

Tables and chart

Barometric Pressure Reference Chart:

Voltage To Mass Air Flow Conversion Table:

Pinpoint Tests