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Home >> Pontiac >> 2004 >> GTO Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> DTC 11 >> Circuit Description

Circuit Description

The powertrain control module (PCM) sends serial data to the body control module (BCM) along the primary serial data bus circuit. Serial data is then sent to the instrument cluster along the secondary serial data bus circuit. The following data is read by the instrument cluster, which then indicates the status as appropriate on the multifunction display (MFD) and/or cluster warning indicators:

A powertrain interface module (PIM) is required to convert the serial data generated by the PCM into serial data that is compatible with the BCM. DTC 11 will set if there is no PCM data message on the bus for more than 10 seconds. In practice the trouble code is set somewhere between 10 and 20 seconds after the last PCM data message is received by the instrument cluster. The DTC is reset within 10 seconds of the arrival of a PCM data message on the bus. The DTC is logged as a History DTC.

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