Doosan D20S-5 Operation & Maintenance Manual page 111

Table 2. Diagnostic Fault Codes (Flash Codes) cont'd. Table 2. Diagnostic Fault Codes (Flash Codes) cont'd.
DFC DFC PROBABLE FAULT PROBABLE
HbridgeFault_ETC HbridgeFault_ETC
Electronic Throttle Control Electronic Throttle Control
Driver has failed. Driver has failed.
Indeterminate fault on Indeterminate fault on
491 491
Hbridge driver for Hbridge driver for
(29) (29)
electronic throttle control. electronic throttle control.
Possibly either ETC+ or Possibly either ETC+ or
ETC- driver signals have ETC- driver signals have
been shorted to ground been shorted to ground
521 521 LowOilPressureFault LowOilPressureFault
(52) (52) Low engine oil pressure Low engine oil pressure
531 531 SysVoltRangeLow SysVoltRangeLow
(53) (53) System voltage too low System voltage too low
541 541 SysVoltRangeHigh SysVoltRangeHigh
(54) (54) System voltage too high System voltage too high
(*) Fault actions shown are default values specified by the OEM. (*) Fault actions shown are default values specified by the OEM.
FAULT FAULT FAULT ACTION ACTION * *
(1) TurnOnMil (1) TurnOnMil
(2) CutThrottle (2) CutThrottle
(1) TurnOnMil (1) TurnOnMil
(2) DelayedEngine (2) DelayedEngine
Shutdown Shutdown
TurnOnMil TurnOnMil
(1) TurnOnMil (1) TurnOnMil
(2) DelayedEngine (2) DelayedEngine
Shutdown Shutdown
-108- -108-
CORRECTIVE CORRECTIVE ACTION
Check ETC driver wiring for a shorted circuit Check ETC driver wiring for a shorted circuit
SECM Pin A17 to ETC + Pin 1 SECM Pin A17 to ETC + Pin 1
SECM Pin A18 to ETC - Pin 4 SECM Pin A18 to ETC - Pin 4
Perform the throttle test using the Service Perform the throttle test using the Service
• •
Tool and re-check for fault Tool and re-check for fault
Check the ETC internal motor drive by Check the ETC internal motor drive by
disconnect disconnecting the th ing the throttle connector and
measuring the measurin g the motor drive resistance at the
throttle throttle
TPS Pin 1 (+DRIVER) to TPS Pin 1 (+DRIVER) to
Pin 4 (-DRIVER Pin 4 (- DRIVER) ~3.0-4.0
Check engine oil level Check engine oil level
Check electrical connection to the oil Check electrical connection to the oil
pressure switch pressure switch
SECM Pin B9 to Oil Pressure Switch SECM Pin B9 to Oil Pressure Switch
Check battery voltage Check battery voltage
Perform maintenance check on electrical Perform maintenance check on
• •
connections to the battery and chassis connections to the battery and chassis
ground ground
Check battery voltage during starting and Check battery voltage during starting and
• •
with the engine running to verify charging with the engine
system and al system and alternator functio
Measure battery power at SECM with a Measure battery power at SECM with a
• •
multimeter (with key on) multimeter (with key on)
SECM Pin A23 (DRVP) to SECM Pin A23 (DRVP) to
SECM Pin A16 (DRVG) SECM Pin A16 (DRVG)
SECM Pin A23 (DRVP) to SECM Pin A23 (DRVP) to
SECM Pin B17 (DRVG) SECM Pin B17 (DRVG)
Check battery and charging system voltage Check battery and charging system voltage
Check battery voltage during starting and Check battery voltage during starting and
• •
with the engine running with the engine running
Check voltage regulator, alternator, and Check voltage regulator, alternator, and
• •
charging system charging system
Check battery and wiring for Check battery and wiring for overheating
• •
and damage and damage
• •
Measure battery power at SECM with a Measure battery power at SECM with a
multimeter (with key on) multimeter (with key on)
SECM Pin A23 (DRVP) to SECM Pin A23 (DRVP) to
SECM Pin A16 (DRVG) SECM Pin A16 (DRVG)
SECM Pin A23 (DRVP) to SECM Pin A23 (DRVP) to
SECM Pin B17 (DRVG) SECM Pin B17 (DRVG)
Operation Section Operation Section
ACTION FIRST FIRST CHECK CHECK
rottle connector and
motor drive resistance at the
) ~3.0-4.0
Ω Ω
electrical
running to verify charging
ternator function n
overheating