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.
JF7 CHECK THE SUSPECT COIL DRIVER CIRCUIT FOR A SHORT TO VOLTAGE
• Measure the voltage between:
( + ) COP Connector, Harness Side | ( - ) Vehicle Battery |
|---|---|
COP | Negative terminal |
Is any voltage present?
Yes | No |
|---|---|
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. | GO to JF8 . |
JF8 CHECK THE SUSPECT COIL DRIVER CIRCUIT FOR A SHORT TO GROUND
• Ignition OFF.
• Measure the resistance between:
( + ) COP Connector, Harness Side | ( - ) Vehicle Battery |
|---|---|
COP | Negative terminal |
Is the resistance greater than 10K ohms?
Yes | No |
|---|---|
For Edge 2.0L, Edge 2.7L, Escape/Kuga 1.6L, Escape/Kuga 2.0L, Expedition, Explorer 2.3L, Explorer 3.5L GTDI, Explorer 3.5L, F-150 2.7L, F-150 3.5L GTDI, Fiesta 1.0L, Fiesta 1.6L GTDI, Flex 3.5L GTDI, Focus, | REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. If the concern or DTC is still present, GO to JF9 . |
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.