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.
QD: DTC P1260: Passive Anti-Theft System
QD: Introduction
QD1 CHECK FOR PATS DTCS
• Repair all PATS DTCs before P1260. Refer to the Workshop Manual Section 419-01, Anti-Theft for System Description, Operation and Self-Test.
Are all PATS DTCs diagnosed?
Yes | No |
|---|---|
GO to QD2 . | REFER to the Workshop Manual Section 419- 01, Anti-Theft, to diagnose any PATS-related DTCs. |
QD2 CHECK FOR ANY OTHER POWERTRAIN DTCS
• Repair all powertrain DTCs other than P1260.
Are all other powertrain DTCs diagnosed?
Yes | No |
|---|---|
GO to QD3 . | DISREGARD DTC P1260. DIAGNOSE all other powertrain DTCs. REFER to Section 4, Diagnostic Trouble Code (DTC) Charts and Descriptions. |
QD3 ATTEMPT TO START THE ENGINE
• Carry out a keep alive memory reset to clear DTC P1260. Refer to Section 2, Resetting The Keep Alive Memory (KAM).
• Attempt to start the engine.
Does the engine start?
Yes | No |
|---|---|
No system concerns exist at the present time. For intermittent no start or start stalls, CHECK for intermittent PATS concerns (PATS cannot stall the engine after 1 second of operation). For intermittent stalls while driving, VERIFY scan tool-to-PCM communication during the concern. If a PCM communication error occurs, the possible causes are: loss of voltage or ground to the PCM, damaged PCM power relay, or a damaged EEC PWR diode. REPAIR as necessary. | DTC P1260 is not the cause of the No Start. REFER to Section 3, No Diagnostic Trouble Codes (DTCs) Present Symptom Chart Index. |
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.