![]() ![]() Voltage from CCD- flows through a 120-ohm termination resistor to the CCD+ bus wire circuit. There is a 5V supply applied through a 13K-ohm resistor within the CCD chip, dropping the 5V to 2.51V on the CCD- bus wire circuit. This bias voltage is applied to both CCD bus wires as a series circuit. ![]() The CCD bus is also supplied a 5V bias voltage by one of the modules on the bus. If there are two termination resistors, they are wired in parallel to each other, giving the CCD bus about 60 ohms total resistance. These resistors serve as termination points. The two parallel bus wires are called CCD Positive (+) and CCD Negative (-) and they are tied together with either one or two 120-ohm resistors that reside separately inside one or two modules on the bus. The bus is a two-wire, twisted pair parallel configuration with all modules joined to the bus in a parallel circuit. The CCD bus consists of "CCD chips," which are inside the various control modules on the bus. The CCD bus was first installed in 1988 and was phased out slowly beginning in 1998. The first network protocol is Chrysler's Chrysler Collision Detection (CCD) Multiplex bus. GM diagnostics Chrysler DRBIII DRB 3 diagnosti readout box 3 functional diagnostics diagnostic tools scanning vehicles fault codes scan tool diagnositcs vehicle diagnostics automotive aftermarket ![]()
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