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Home >> Mercury >> 1993 >> Villager LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 383 (Electronic Control Modules) >> Powertrain Control Module >> Description >> Operation - Data Bus Communication Receive - Pcm Input
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Operation - Data Bus Communication Receive - Pcm Input

WARNING: This page is about a different car, the 2004 Dodge Grand Caravan, 2004 Dodge Caravan, and 2004 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.

The PCM uses the SCI communication bus to preform engine diagnostics and flash operations. The transmission side of the PCM uses the SCI communication bus to flash new software. However, diagnostics is performed via the vehicles J1850 bus for the transmission side of the PCM.

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