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.
JB: Secondary Ignition (COP)
JB: Introduction
JB1 CHECK FOR DTCS
NOTICE: Do not disconnect any COP while the engine is running, damage to the COP or PCM may occur.
Are DTCs P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0309, P0310 or
P0316 present?
Yes | No |
|---|---|
GO to JB2 . | For symptoms without DTCs, GO to JB2 . For all others, RETURN to Section 3 , Symptom Charts for further direction. |
JB2 CYLINDER POWER BALANCE TEST
Note: The IDS test referenced in this step may not be available on all vehicles. Follow the YES answer if the IDS test is not available.
• Carry out the Power Balance Test. Refer to the instruction manual provided by the scan tool manufacturer.
Are all cylinders contributing correctly during the power balance test?
Yes | No |
|---|---|
GO to JB3 . | GO to JB4 . |
JB3 VISUAL INSPECTION OF THE IGNITION SYSTEM
• Visually inspect the engine compartment to make sure all coils are correctly and securely connected.
• Examine all the wiring harnesses and connectors for damaged, burned, or overheated insulation, and loose or broken conditions.
• Make sure the vehicle battery is in good condition and all of the accessories are turned off.
• For the 6.2L engine, check the condition of the exhaust spark plug wire and boots.
Is a concern present?
Yes | No |
|---|---|
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test. | GO to JB4 . |
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.