SPN 639 CAN BUS Offline
Circuit Description
The ECM monitors the CAN bus for communication between
devices. If expected CAN bus communication is lost, SPN
639 will be stored in the ECM.
Possible FMIs - SPN 639
The possible FMIs for SPN 639 are as follows:
FMI
Description
19 Data Error
For diagnosing potential CAN BUS system problems,
see
CAN BUS Troubleshooting - Check Voltages, Check
Waveforms
in this section.
45
Not for
Reproduction
Summary of Contents for 25E300
Page 1: ...Vanguard EFI Diagnostics and Repair 25E300 REPAIR MANUAL N o t f o r R e p r o d u c t i o n...
Page 18: ...Model 25E300 EFI Component Locations 19 N o t f o r R e p r o d u c t i o n...
Page 26: ...Speed vs Voltage Table 8 27 N o t f o r R e p r o d u c t i o n...
Page 61: ...25E300 Wiring Harness Diagram 62 vanguardpower com N o t f o r R e p r o d u c t i o n...
Page 62: ...63 N o t f o r R e p r o d u c t i o n...
Page 88: ...Model 25E300 Fuel Hose Location and Routing Tankless 89 N o t f o r R e p r o d u c t i o n...
