P1503

Diagram Chart:

CIRCUIT DESCRIPTION

This DTC indicates that the ECM has been programmed with a frequency code that does not match the code in the Theft Deterrent Module.

CONDITIONS FOR RUNNING THE DTC

Engine cranking

CONDITIONS FOR SETTING THE DTC

The ECM has been programmed with a frequency code that does not match the code in the Theft Deterrent Module.

ACTION TAKEN WHEN THE DTC SETS

The ECM will not illuminate the Malfunction Indicator Lamp (MIL).

CONDITIONS FOR CLEARING THE MIL/DTC

^ The DTC clears after forty consecutive warm-up cycles if no failures report by this diagnostic or any other non-emission related diagnostic.

^ The ECM battery voltage is interrupted.

^ The scan tool clears the MIL/DTC.

DIAGNOSTIC AIDS

^ The wrong ignition key, or the use of a key without a transponder will cause this DTC to set as well as a no-start.

^ If the ECM and the Theft Deterrent Module have not been properly programmed, this DTC may set and the vehicle will not start. Refer to Antitheft and Alarm Systems for the programming instructions.