Some of Chrysler's 1988 model year vehicles contain a serial bus. This paper discusses its implementation and general usage. It describes a type of bus that was designed for smart modules to be able to cost effectively transfer data within an automotive environment. This paper is a sixty plus page users manual describing how to use both the Chrysler's C2D* bus and the C2D chip. This manual contains descriptions of the vehicle system, the information usage, the message formats, the hardware interfacing requirements, the bus speed, and the C2D chip functions.
4 / 4The K-Line is suitable for both on-board and offboard diagnostics. K-Line is a bidirectional line. It is used during initialization to convey address information from the diagnostic tester to vehicle ECUs, simultaneously with the line-L. Line-L is a unidirectional line and used only during initialization to convey address information from the diagnostic tester to vehicle ECUs, simultaneously with the K line. At all other times it should remain idle in the logic ā1ā state. After conveying the address, the K line is used to convey bidirectional data between vehicle ECUs and the diagnostic tester to complete initialization. After initialization, it is used to convey request messages from the diagnostic tester to vehicle ECUs and response messages from the vehicle ECUs to the diagnostic tester.
0 / 0Introduced in 1998, replaced CCD as a Body Protocol. A vehicle will have either CCD or PCI, not both and PCI is a Single Wire Network. PCI Bus Speed 10.4 kbps and can support up to 32 modules or nodes. It is used as a global OBD-II scan tool interface.
1 / 1SCI stands for Serial Communication Interface. SCI is a diagnostic interface, not a network protocol and allows scan tool communication with PCM when bus is dead. SCI or Serial Communication Interface is for scan tool communication only. SCI is not a bus or a network protocol. Since SCI is not part of the CCD or PCI bus, scan tool communication is still possible when the bus is dead. On PCI bus vehicles, enhanced and OE scan tool communication takes place on the SCI interface. Global scan tools communicate on the PCI bus.
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