Can a PCI bus communicate with a sci interface?
Can a PCI bus communicate with a sci interface?
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.
Can a loss of power affect a PCI bus?
PCI Bus Diagnosis. A loss of power or ground to an individual node should not affect bus communication. Only that module should be effected. However, an open ground could cause a back feed of voltage to the rest of the bus, potentially interrupting communication to the whole bus. Resistance values determine the module’s dominance on the bus.
Can a serial communication interface ( SCI ) be used?
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.
How to communicate with modules on Serial Bus?
Voltmeters and ohmmeters have their place in serial bus diagnostics. If you can’t communicate with a particular module on the bus with your scan tool, try to communicate with another module that the vehicle schematic shows to possibly be on the same serial bus. Try the most basic modules first—for example, the PCM, ABS module and BCM.
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.
PCI Bus Diagnosis. A loss of power or ground to an individual node should not affect bus communication. Only that module should be effected. However, an open ground could cause a back feed of voltage to the rest of the bus, potentially interrupting communication to the whole bus. Resistance values determine the module’s dominance on the bus.
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.
Voltmeters and ohmmeters have their place in serial bus diagnostics. If you can’t communicate with a particular module on the bus with your scan tool, try to communicate with another module that the vehicle schematic shows to possibly be on the same serial bus. Try the most basic modules first—for example, the PCM, ABS module and BCM.
