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.
( + ) PCM Connector, Harness Side | ( - ) INJ Connector, Harness Side |
|---|---|
Suspect INJ | INJ |
Suspect INJRTN | INJRTN |
Are the resistances less than 5 ohms?
Yes | No |
|---|---|
GO to DI5 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
DI5 CHECK THE INJ AND INJRTN CIRCUITS FOR A SHORT TO GROUND
• Ignition OFF.
• Measure the resistance between:
( + ) INJ Connector, Harness Side | ( - ) |
|---|---|
INJ | Ground |
INJRTN | Ground |
Are the resistances greater than 10K ohms?
Yes | No |
|---|---|
GO to DI6 . | REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. |
DI6 CHECK THE INJ AND INJRTN CIRCUITS FOR A SHORT TO VOLTAGE
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) INJ Connector, Harness Side | ( - ) |
|---|---|
INJ | Ground |
INJRTN | Ground |
Is any voltage present?
Yes | No |
|---|---|
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. | GO to DI7 . |
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.