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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 113 (Data Communication System - Diagnostic Information And Procedures (1 Of 2)) >> Diagnostic Information and Procedures >> DTC U0074 (Powertrain Expansion Bus without HP4) >> Circuit/System Description

Circuit/System Description

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The devices connected to the powertrain high speed GMLAN serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices when the ignition switch is in any position other than OFF. The powertrain high speed GMLAN serial data bus uses terminating resistors that are in parallel with the powertrain high speed GMLAN (+) and (-) circuits.

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