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Devices that power up the PCM without powering up the PATS Control module can experience no-start concerns. Always verify that there are no aftermarket devices causing interference, such as alarms, remote starters or other devices utilizing transponders.Do not reprogram keys if a fault cannot be identified. Erasing and reprogramming ignition keys does not cure any known intermittent PATS no-start issues.This is normal operation for PATS prove out. PATS Theft Indicator stays on for 2 or 3 seconds (depending on system type) at Ignition RUN or START and then off.(See chart on reverse side for applicable system.) This is normal operation for PATS to act as a visual theft deterrent. PATS Theft Indicator flashes every 2 seconds at Ignition OFF.Check Table 1, for presence of Starter Interrupt. There is a no-crank problem on vehicles without PATS starter disable.

Remote Entry/Keyless Entry problems: PATS is completely separate from the Remote Entry/Keyless Entry systems.

Alarm goes off: PATS is completely separate from the perimeter alarm system (if installed).

Engine stalls on road: Once the engine runs for one second, PATS CANNOT disable the engine.

There is no communications with PCM PCM will always communicate on the diagnostic link regardless of theft status.

The “Service Engine Soon”light is illuminated.

Retrieve DTC’S from applicable PATS control function (PATS/ICM/VIC/HES/SCIL). P1260 :PCM disabled the vehicle because of a PATS concern.

U1147/U1262 :Communications issue, SCP (J1850), between PCM and PATS control (PATS/ICM/VIC/HES/SCIL). B2139 :PCM ID does not match between the PCM and PATS control (PATS/ICM/VIC/HEC/SCIL).ī2431 :Key programmed failure (defective key or transceiver)