P1626

CIRCUIT DESCRIPTION
The theft deterrent controller (VTD) module produces the theft deterrent fuel enable signal when ignition is ON and the proper transponder key value is detected. The Powertrain Control Module (PCM) monitors the fuel enable signal during crank. If the proper signal is present on the Class 2 Serial Data Circuit, the PCM enables the fuel delivery in order to allow the engine to start. If the PCM determines that the fuel enable signal is not present or incorrect while the engine is running, DTC P1626 is set. The engine continues to start and run as long as DTC P1626 is stored. If the problem affects inputs to the VTD signal, the starter motor may be disabled. Refer to Vehicle Theft Deterrent (VTD) Description and Operation.

CONDITIONS FOR RUNNING THE DTC
The engine is running.

CONDITIONS FOR SETTING THE DTC
The PCM has detected a loss of the state of health serial data message from the theft deterrent system.

ACTIONS TAKEN WHEN THE DTC SETS
^ The VTD module sends a class 2 message to the instrument cluster to illuminate the SECURITY indicator.
^ The Powertrain Control Module (PCM) will not illuminate the Malfunction Indicator Lamp (MIL).
^ The PCM will store conditions which were present when the DTC set as failure records data only. This information will not be stored as freeze frame data.

CONDITIONS FOR CLEARING THE MIL/DTC
^ A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
^ The DTC can be cleared by using a scan tool.

DIAGNOSTIC AIDS
Refer to Testing for Intermittent and Poor Connections and Testing for Electrical Intermittents in Diagrams.

TEST

Steps 1-4: