Doosan D20S-5 Operation & Maintenance Manual page 120

Operation Section
Table 2. Diagnostic Fault Codes (Flash Codes) cont'd.
DFC PROBABLE FAULT
LSDFault_Dither1
Dither Valve 1 Fault, signal
711
has opened or shorted to
(71)
ground or power or defective
dither 1 valve
LSDFault_Dither2
Dither Valve 2 Fault, signal
712 has opened or shorted to
ground or power or defective
dither 2 valve
713 LSDFault_CSValve
LSDFault_CheckEngine
Check Engine Lamp Fault,
714 signal has opened or shorted
to ground or power or
defective check engine lamp
LSDFault_CrankDisable
Crank Disable Fault, signal
715 has opened or shorted to
ground or power or defective
crank disable relay
LSDFault_FuelPump
Fuel pump fault, signal has
716 opened, shorted to ground or
power, or defective fuel
pump
LSDFault_LockOff
Fuel lock off Valve Fault,
717 signal has opened or shorted
to ground or power or
defective Fuel lock off valve
FAULT ACTION *
(1) TurnOnMil
Check FTV1 for an open wire or FTV connector
(2) Disable
being disconnected
GasO2 Ctrl
FTV1 Pin 1 (signal) to SECM Pin A1
FTV1 Pin 2 (power) to SECM (DRVP) Pin A23
(3) Disable
Check FTV1 for an open coil by disconnecting
GasPost O2Ctrl
the FTV connector and measuring the
(Certified Units
resistance (~26Ω ± 2Ω )
Only)
(1) TurnOnMil
Check FTV1 for an open wire or FTV connector
(2) Disable
being disconnected or signal shorted to GND
GasO2 Ctrl
FTV2 Pin 1 (signal) to SECM Pin A2
FTV2 Pin 2 (power) to SECM (DRVP) Pin A23
(3) Disable
Check FTV1 for an open coil by disconnecting
GasPost O2Ctrl
the FTV connector and measuring the
(Certified Units
resistance (~26Ω ± 2Ω )
Only)
None
Check 'Check Engine Lamp' for an open wire or
None
shorted to GND
None
Check fuel pump for an open wire or connector
being disconnected or signal shorted to GND
Fuel Pump Pin B (signal) from SECM Pin A13
Fuel Pump Pin A (power) from main relay 1 Pin
A23
TurnOnMil
Check Fuel Pump for an open coil by
disconnecting the Fuel Pump connector and
measuring the resistance
(~26Ω ± 3Ω)
Check for 12V to fuel pump
Check fuel lock off valve for an open wire or
connector being disconnected or signal shorted
to GND
Lock off Pin B (signal) from SECM Pin A11
Lock off Pin A (power) from main relay 1 Pin
TurnOnMil
A23
Check lock off valve for an open coil by
disconnecting the lock off valve connector and
measuring the resistance (~26Ω ± 3Ω)
Check for 12V to lock off valve
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CORRECTIVE ACTION FIRST CHECK
N/A
N/A