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.
JB4 CHECK THE VPWR TO THE SUSPECT COIL
• Suspect Coil Assembly connector disconnected.
• Measure the voltage between:
( + ) COP Connector, Harness Side | ( - ) |
|---|---|
VPWR | Ground |
Is the voltage greater than 10.5 V?
Yes | No |
|---|---|
GO to JB5 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
JB5 MISFIRE ON CYLINDERS 1 THROUGH 10
Are DTCs P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0309, or P0310 present?
Yes | No |
|---|---|
For Edge 3.5L, Explorer 3.5L TiVCT, Explorer 3.7L, F-150 3.5L TiVCT, Flex 3.5L TiVCT, MKS 3.7L, MKT 3.7L, MKX, MKZ 3.7L, Mustang 3.7L, Taurus 3.5L TiVCT, Taurus 3.7L, and Transit 3.7L, GO to JB6 . For all others, GO to JB8 . | GO to JB9 . |
JB6 CHECK FOR BANK 1 OR BANK 2 MISFIRE DTCS
Note: DTCs P0301, P0302, P0303 apply to bank 1 and DTCs P0304, P0305, P0306 apply to bank 2 on 6 cylinder engines.
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.