Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
DC11 CHECK THE MAF CIRCUIT VOLTAGE CYCLING INTEGRITY
• Access the PCM and monitor the MAF (VOLT) PID.
• Connect a 5 amp fused jumper wire between the following:
Point A MAF/IAT Sensor Connector, Harness Side | Point B MAF/IAT Sensor Connector, Harness Side |
|---|---|
MAF | VPWR |
• For Fiesta,
• Connect a 5 amp fused jumper wire between the following:
Point A MAF/IAT Sensor Connector, Harness Side | Point B |
|---|---|
SIGRTN | Ground |
• For all others,
• Connect a 5 amp fused jumper wire between the following:
Point A MAF/IAT Sensor Connector, Harness Side | Point B |
|---|---|
MAFRTN | Ground |
• Record the PID reading while both jumpers are installed.
• Remove the VPWR jumper while observing the MAF V PID.
Does the MAF PID change from greater than 4.50 volts to less than 0.20 volt when the VPWR jumper is removed?
Yes | No |
|---|---|
CLEAN the MAF/IAT sensor using CRC Mass Air Flow Sensor Cleaner 05110 or equivalent. RESET the keep alive memory (KAM). REFER to Section 2, Resetting The Keep Alive Memory (KAM). REPEAT the self-test. If the concern is still present, INSTALL a new MAF/IAT sensor. REFER to the Workshop Manual Section 303-14, Electronic Engine Controls. RESET the keep alive memory (KAM). REFER to Section 2, Resetting The Keep Alive Memory (KAM). REPEAT the self-test. | GO to DC12 . |
DC12 CHECK THE FUNCTIONALITY OF THE MAF SENSOR
Note: A MAF PID value of less than 0.35 volt may indicate an incorrectly installed air cleaner or a leak in the air inlet system.
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.