Doosan D20S-5 Operation & Maintenance Manual page 117

(*) Fault actions shown are default values specified by the OEM. (*) Fault actions shown are default values specified by the OEM.
Table 2. Diagnostic Fault Codes (Flash Codes) cont'd. Table 2. Diagnostic Fault Codes (Flash Codes) cont'd.
DFC DFC PROBABLE FAULT PROBABLE
LiqPostO2FailedLean LiqPostO2FailedLean
Pre-catalyst O2 sensor Pre-catalyst O2 sensor
852 852
indicat indicates
operation on gasoline operation on gasoline
LiqO2FailedRich LiqO2FailedRich
Pre-catalyst O2 sensor Pre-catalyst O2 sensor
871 871
indicates indicat
operation on gasoline operation on gasoline
LiqPostO2FailedRich LiqPostO2FailedRich
Pre-catalyst O2 sensor Pre-catalyst O2 sensor
872 872
indicat indicates
operation on gasoline operation on gasoline
O2RangeLow O2RangeLow
Pre-catalyst O2 sensor Pre-catalyst O2 sensor
911 911 voltage out of range low, voltage out of range low,
sensor signal shorted to sensor signal shorted to
ground ground
O2_PostCatRangeLow O2_PostCatRangeLow
Post-catalyst O2 Post-c
voltage out of range low, voltage out of range low,
912 912
sensor signal shorted to sensor signal shorted to
ground ground
O2RangeHigh O2RangeHigh
Pre-catalyst O2 sensor Pre-catalyst O2 sensor
voltage out of range high, voltage out of range high,
921 921
sensor signal shorted to sensor signal shorted to
power power
O2_PostCatRangeHigh O2_PostCatRangeHigh
Post-catalyst O2 Post-c
922 922 voltage out of range low, voltage out of range low,
sensor signal shorted to sensor signal shorted to
ground ground
FuelTempRangeLow FuelTempRangeLow
Fuel Temperature Sensor Fuel Temperature Sensor
Input is Low normally set if Input is Low normally set if
931 931 the fuel temperature the fuel temperature
sensor wire has shorted to sensor wire has shorted to
chassis ground or the chassis ground or the
sensor has failed. sensor has failed.
FuelTempRangeHigh FuelTempRangeHigh
Fuel Temperature Sensor Fuel Temperature Sensor
Input is High normally set if Input is High normally set if
932 932 the fuel temperature the fuel temperature
sensor wire has been sensor wire has been
disconnected or disconnec
has opened to the SECM. has opened to the SECM.
FAULT FAULT FAULT ACTION
(1) TurnOnMil (1) TurnOnMil
(2) (2) DisableL DisableLiqPost
es extended lean extended lean
O2Ctrl O2Ctrl
(1) TurnOnMil (1) TurnOnMil
(2) (2) DisableL DisableLiquid
es extended rich extended rich
O2Ctrl O2Ctrl
(1) TurnOnMil (1) TurnOnMil
(2) DisableLiq (2) DisableLiq
es extended rich extended rich
PostO2Ctrl PostO2Ctrl
atalyst O2 sensor sensor
(1) TurnOnMil (1) TurnOnMil
(2) DisableLiquid O (2) DisableLiquid O2Ctrl
(3) (3) DisableGas DisableGas
O2Ctrl O2Ctrl
(1) TurnOnMil (1) TurnOnMil
(2) Disable asoline (2) Disable asoline
atalyst O2 sensor sensor Post-catalyst Post-catalyst
O2Ctrl O2Ctrl
(3) Disable LPG (3) Disable LPG
Post-catalyst Post-catalyst
O2Ctrl O2Ctrl
ted or the circuit the circuit
-114- -114-
ACTION * * CORRECTIVE CORRECTIVE ACTION
Correct other faults that may contribute to 852 Correct other faults that may contribute to 852
(e.g. faults pertaining to Injectors, MAP, IAT, (e.g. faults pertaining to Injectors, MAP, IAT,
Pre-Cat O2, Post Cat O2 sensor) Pre-Cat O2, Post Cat O2 sensor)
iqPost Look for leaks in exhaust, catalytic converter, Look for leaks in exhaust, catalytic converter,
HEGO sensors; repair leaks. HEGO sensors; repair leaks.
Check all sensor connections (see fault 842 Check all sensor connections (see fault 842
corrective actions). corrective actions).
High gasoline fuel pressure, perform gasoline High gasoline fuel pressure, perform gasoline
iquid pressure test pressure test
Injector problems, e.g. leaking, defective injector Injector problems, e.g. leaking, defective injector
Correct other faults that may contribute to 872 Correct other faults that may contribute to 872
(e.g. faults pertaining to Injectors, MAP, IAT, (e.g. faults pertaining to Injectors, MAP, IAT,
Pre-Cat O2, Post Cat O2 sensor) Pre-Cat O2, Post Cat O2 sensor)
Look for leaks in exhaust, catalytic converter, Look for leaks in exhaust, catalytic converter,
HEGO sensors; repair leaks. HEGO sensors; repair leaks.
Check all sensor connections (see fault 842 Check all sensor connections (see fault 842
corrective actions).
corrective actions).
None None
None None
Check if O2 sensor installed before catalyst is Check if O2 sensor installed before catalyst is
shorted to +5Vdc or battery. shorted to +5Vdc or
2Ctrl
O2 (signal) Pin 3 to SECM Pin B13 O2 (signal) Pin 3 to SECM Pin B13
SECM (XDRP + 5V) Pin B24 SECM (XDRP + 5V) Pin B24
SECM (DRVP + 12V) Pin A23 SECM (DRVP + 12V) Pin A23
Check if O2 sensor installed after catalyst is Check if O2 sensor installed after catalyst is
shorted to +5Vdc or battery. shorted to +5Vdc or
O2 (signal) Pin 3 to SECM Pin B19 O2 (signal) Pin 3 to SECM Pin B19
Possible Possible voltage
Pin B24 and SECM (DRVP + 12V) Pin A23 Pin B24 and SECM (DRVP + 12V) Pin A23
Check fuel temp sensor connector and wiring for Check fuel temp sensor connector and wiring for
a short to G a short to GND
TurnOnMil TurnOnMil SECM (signal) Pin B14 SECM (signa
SECM (sensor GND) Pin B1 to SECM (sens
SECM (system GND) Pin A16, B17 SECM (system GND) Pin A16, B17
Check if fuel temp sensor connector is Check if fuel temp sensor connector is
disconnected or for an open FTS circuit disconnected or for an open FTS circuit
TurnOnMil TurnOnMil SECM (signal) Pin B14 SECM (signa
SECM (sensor GND) Pin B1 to SECM (sensor GND) Pin B1 to
FTS Pin 2 FTS Pin 2
Operation Section Operation Section
ACTION FIRST FIRST CHECK CHECK
N/A N/A
N/A N/A
battery.
battery.
voltage sources: sources: SECM SECM (XDRP (XDRP + 5V)
ND
l) Pin B14 to FTS Pin 1 to FTS Pin 1
or GND) Pin B1 to FTS Pin 2 FTS Pin 2
l) Pin B14 to FTS Pin 1 to FTS Pin 1
+ 5V)