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.
( + ) MAF/IAT Sensor Connector, Harness Side | ( - ) PCM Connector, Harness Side |
|---|---|
MAF | MAF |
• For Motorhome / Stripped Chassis / Step Van,
• Measure the resistance between:
( + ) MAF/IAT Sensor Connector, Harness Side | ( - ) |
|---|---|
GND | Ground |
• For all others,
• Measure the resistance between:
( + ) MAF/IAT Sensor Connector, Harness Side | ( - ) PCM Connector, Harness Side |
|---|---|
SIGRTN | SIGRTN |
Are the resistances less than 5 ohms?
Yes | No |
|---|---|
GO to DC19 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
DC19 CHECK THE MAF SIGNAL CIRCUIT FOR A SHORT
• Measure the resistance between:
( + ) MAF/IAT Sensor Connector, Harness Side | ( - ) |
|---|---|
MAF | Ground |
Is the resistance greater than 10K ohms?
Yes | No |
|---|---|
GO to DC20 . | REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. |
DC20 CHECK FOR A SHORT TO VOLTAGE
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) MAF/IAT Sensor Connector, Harness Side | ( - ) |
|---|---|
MAF | Ground |
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.