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Speedo reading

952 Views 4 Replies 3 Participants Last post by  michael.redman.92
Does anyone know where the speedo gets its reading from??

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The Engine Control Module (ECM) sends a signal over the high speed CAN-Bus to the Body Control Module (BCM). The BCM sends a signal over the low speed CAN-Bus to the instrument cluster. The speedometer defaults to 0 if the serial communication is lost between any of these modules.
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