Table Of Contents

    Description of DTC code P1002 Generic

    The TCM (Transmission Control Module) uses the ignition key off timer to enable certain diagnostic testing. This controller checks that the timer is functioning properly to ensure that the diagnostic tests are conducted within the proper enabling conditions.

    The ignition off-timer value is stored in the Cockpit Compartment Node (CCN), which provides the off-time message to the TIMP (Totally Integrated Power Module), which in turn transmits the value over the CAN Bus. The TCM gets the signal and then matches the timer value with the engine coolant ignition temperature and the engine coolant start-up temperature message.

    The P1002 OBDII fault code setting occurs when the ignition off time is less than a calibrated value.

    Symptoms of fault code P1002 Generic

    Causes of OBD2 P1002 Generic

    The P1002 OBD2 diagnostic code is stored by the following:

    • Ignition Switch wiring or connections may be faulty.
    • Ignition Switch may be in poor condition.
    • The Cabin Compartment Node may have been damaged.

    Possible solutions of the DTC code P1002 Generic

    To correct the DTC P1002 OBDII code consider the following:

    • Consult the Technical Service Bulletins.
    • Inspect the wiring and connections related to the Ignition Switch for corrosion or burns. If you discover such damage or other deficiencies, proceed with repairs.
    • Check the integrity of the Ignition Switch and the Cabin Compartment Node. For both diagnostics, it is necessary to follow the manufacturer's diagnostic steps. If you determine that there are deficiencies in one of these, make the necessary corrections.


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