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.
( + ) APP Sensor Connector, Harness Side | ( - ) APP Sensor Connector, Harness Side |
|---|---|
APPVREF1 | APPRTN1 |
APPVREF2 | APPRTN2 |
Are the voltages between 4.5 - 5.5 V?
Yes | No |
|---|---|
GO to DK5 . | GO to Pinpoint Test C . |
DK5 CHECK THE APP CIRCUIT FOR AN OPEN
• Ignition OFF.
• PCM connector disconnected.
• Measure the resistance between:
( + ) APP Sensor Connector, Harness Side | ( - ) PCM Connector, Harness Side |
|---|---|
APP1 | APP1 |
APP2 | APP2 |
Are the resistances less than 5 ohms?
Yes | No |
|---|---|
GO to DK6 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
DK6 CHECK THE APP CIRCUIT FOR A SHORT TO GROUND
• Measure the resistance between:
( + ) APP Sensor Connector, Harness Side | ( - ) |
|---|---|
APP1 | Ground |
APP2 | Ground |
Are the resistances greater than 10K ohms?
Yes | No |
|---|---|
GO to DK7 . | REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. |
DK7 CHECK THE APP CIRCUIT FOR A SHORT TO VOLTAGE
• Ignition ON, engine OFF.
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.