QD: Diagnostic Trouble Code (DTC) P1260

QD: Introduction See: QD: Diagnostic Trouble Code (DTC) P1260 - Introduction

QD1 CHECK FOR PATS DTCs

• Repair all Passive Anti-Theft (PATS) DTCs before P1260. (Refer to Antitheft and Alarm Systems for System Description and Operation).

Have all PATS DTCs been diagnosed?
Yes

• GO to QD2

.

No

• REFER to Antitheft and Alarm Systems.

QD2 CHECK FOR OTHER POWERTRAIN DTCs

• Repair all powertrain DTCs other than P1260.

Have all other powertrain DTCs been diagnosed?
Yes

• GO to QD3

.

No

• REFER to Section 4, Powertrain Diagnostic Trouble Code (DTC) Charts See: A L L Diagnostic Trouble Codes ( DTC )\Testing and Inspection\Diagnostic Trouble Code Descriptions, for Pinpoint Test direction and REPAIR other DTCs.

QD3 ATTEMPT TO START ENGINE

• Reset the keep alive memory (KAM) to clear DTC P1260. Refer to Section 2, Resetting The Keep Alive Memory (KAM) See: Diagnostic Trouble Code Tests and Associated Procedures\SECTION 2: Diagnostic Methods\Resetting The Keep Alive Memory (KAM) for detail instructions.
• Attempt to start the engine.

Will the engine start?
Yes

• No system faults exist at present time. For intermittent No Starts or

Start Stalls, CHECK for intermittent PATS faults. (PATS cannot stall the
engine after 1 second of operation.) For intermittent stalls while
driving, VERIFY scan tool-to-PCM communication during concern. If PCM
communication error occurs, possible causes are:

• Loss of PWRS or GNDS to PCM
• Faulty PCM PWR relay
• Faulty EEC PWR diode
• Shorted VREF signal

REPAIR as necessary. RETURN vehicle to customer.

No

• DTC P1260 is not the cause of the No Start. GO to Section 3, Symptom Charts to diagnose the No Start symptom. See: Symptom Related Diagnostic Procedures