Dtc 629-Fuel Pump Relay Coil Short-To-Power - Kubota WG1605-E3 Diagnostic Manual

WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, DM

DTC 629-Fuel Pump Relay Coil Short-To-Power

• J1939 SPN: 1348 FMI: 3
• Hardware: Fuel Pump Relay Pull in Coil
• Enabling Conditions: Key On, Engine Off
• Set Conditions: Fuel Pump relay coil output short to power/voltage
• Corrective Action(s): Illuminate MIL and/or sound audible warning or illuminate secondary warning lamp
• Non-emissions related fault
• Possible Causes: Shorted relay pull in coil, relay driver circuit shorted to voltage in wire harness
• J1939 SPN: 1347 FMI: 6
• Hardware: Fuel Pump Motor
• Enabling Conditions: Engine Running
• Set Conditions: Fuel pump motor high-side on-state < 4.0 volts, battery voltage < 16.0 volts
• Corrective Action(s): Illuminate MIL
• Non-emissions related
• Possible Causes:
The ECM has auxiliary low-side drivers that can turn on warning devices or ground electromagnetic relay coils to
control power to devices connected to the engine.
The fault of DTC 627 sets if the output for the fuel pump relay is detected as an open circuit. If this fault is active
the fuel pump will not receive power and the engine will not run on gasoline.
The fault of DTC 628 sets if the output for the fuel pump relay is detected as being shorted to ground. If this fault
is active and the high-side of the fuel pump relay is supplied, the fuel pump will run until the relay or high-side power
is removed.
The fault of DTC 629 sets if the output for the fuel pump relay is detected as shorted to power. If this fault is active
the fuel pump will not receive power and will not run.
1-200
ECM SYSTEM
KiSC issued 12, 2016 A