bodycontrolmodules-全文預(yù)覽
【正文】 oller on 2020 and later year trucks. The body controller or ESC contains a microprocessor. The body controller or ESC uses information obtained from input sources to control the outputs. Copyright 169。 2020 Delmar, Cengage Learning SAE J1939 Failure Mode Indicator Figure 1334 SAE J1939 failure mode indicator. Copyright 169。 ? This software permits viewing diagnostic trouble codes by the body controller and EGC, along with fault descriptions Copyright 169。 2020 Delmar, Cengage Learning Freightliner Multifunction Switch Figure 1328 Freightliner multifunction switch. Copyright 169。 2020 Delmar, Cengage Learning Freightliner SmartPlexTM Electronic Module Locations Figure 1322 Freightliner SmartPlexTM electronic module locations. Copyright 169。 one high side driver and two low side drivers. Copyright 169。 2020 Delmar, Cengage Learning Cruise Control Related Inputs Output is J1939 Message to Engine ECM Figure 1318 Cruise control related inputs。 2020 Delmar, Cengage Learning Tech Tip The body controller only powers the applicable trailer light relay control circuit. The body controller does not directly supply the current to the trailer lighting. A conventional CPD such as a fuse or a circuit breaker in the PDC is used to protect the trailer wiring, not virtual fusing. Copyright 169。 2020 Delmar, Cengage Learning Tech Tip Think of high side drivers as being like conventional relays. A small signal provided by the microprocessor is used to control a large amount of current. Copyright 169。 12V at the Input Terminal Figure 1313 Diagnosable switch open circuit。 2020 Delmar, Cengage Learning Diagnosable Switch Closed。 2020 Delmar, Cengage Learning Diagnosable Switch With Contacts Open and Closed Figure 1310 Diagnosable switch with contacts open and closed. Copyright 169。 2020 Delmar, Cengage Learning CAUTION It is vital that any electronic system that uses a reference ground only be grounded in accordance with OEM remendations. Even though reference ground may appear to be the same as chassis ground, connecting the reference ground to chassis ground outside the electronic module may result in the truck having intermittent EMI induced problems that are nearly impossible to duplicate or troubleshoot. Copyright 169。 2020 Delmar, Cengage Learning Low Side Drivers ? Current ratings of 1A or less ? Commonly used in body controllers ? Low side drivers sink a path to ground ? Typically used to energize relay coils or small solenoids Copyright 169。 2020 Delmar, Cengage Learning Typical Body Control Module Horn Circuit Figure 135 Typical body control module horn circuit. Copyright 169。 2020 Delmar, Cengage Learning International Body Controller Figure 132 International body controller. Copyright 169。 and Freightliner174。Copyright 169。 2020 Delmar, Cengage Learning Learning Objectives (continued) ? Retrieve DTC’s stored in memory related to the body controller ? List the main ponents of the International Diamond Logic174。 2020 Delmar, Cengage Learning
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