Doosan D50S-5 Operation & Maintenance Manual page 96

signal is open signal is open
27 27 PredictedTPSDifference PredictedTPSDifference
Measured TPS1 is different than Measured TPS1 is different than
SECM Calculated throttle position SECM Calculated throttle position
28 28 ETCSpringTestFailed ETCSpringTestFailed
Upon initial key-up the internal Upon initial key-up the internal
throttle return spring has become throttle return spring has become
weak weak
29 29 ETCDriverFault ETCDriverFault
Throttle driver over-current or Throttle driver over-current or
driver signals shorted driver signals shorted
33 33 MapSensorInputLow MapSensorInputLow
MAP signal disconnected, open MAP signal disconnected, open
circuit or sensor malfunction circuit or sensor malfunction
(Expected faults when TMAP (Expected faults when TMAP
connector is unplugged connector is unplugged
CODES: 33 & 38) CODES: 33 & 38)
Operation Section Operation Section
Table a. MI-04 Diagnostic Fault Codes (Flash Codes) Table a. MI-04 Diagnostic Fault Codes (Flash Codes)
DFC DFC
34 34 MapSensorInputHigh MapSensorInputHigh
TMAP sensor failure or shorted TMAP sensor failure or shorted
circuit circuit
Probable Fault Probable Fault
Engine Shutdown Engine Shutdown
Power Limit Power Limit
Disable Throttle Disable Throttle
Disable Throttle Disable Throttle
95 95
Action Action
Disable Throttle Disable Throttle
bearing wear bearing wear
Check the ETC driver wiring for Check the ETC driver wiri
 
an open circuit an open circuit
Check Check for for manifold manifold leaks leaks between
the throttle and the engine the throttle and the engine
Note: Fault Code 27 is predicted Note: Fault Code 27 is predicted
TPS. TPS. This fault This fault means means that
throttle throttle and and our our
prediction for throttle Do not agree. prediction for throttle Do not agree.
This code often comes up as This code often comes up as
suspected suspected during during
manuevers. It is not system trouble. manuevers. It is not system trouble.
If the fault really sets, then the If the fault really sets, then the
engine will shut down. engine will shut down.
Perform throttle Perform throttle spring spring
cycling cycling the the ignition ignition
re-check for fault re-check for fault
Check ETC Check ETC driver driver wiring wiring for
shorted circuit shorted circuit
ETC+ PIN1 to SECM P ETC+ PIN1 to SECM PIN 22 IN 22
ETC- PIN 4 to SECM PIN 24 ETC- PIN 4 to SECM PIN 24
Perform Throttle test and with the Perform Throttle test and with the
Service Tool and re-check for fault Service Tool and re-check for fault
Check the ETC internal motor drive Check the ETC internal motor drive
by by disconnecting disconnecting the the
connector and measuring the motor connector and measuring the motor
drive resistance at the throttle drive resistance at the throttle
TPS PIN 1 (+DRIVER) to PIN 4 TPS PIN 1 (+DRIVER) to PIN 4
(-DRIVER) ~3.0 (-DRIVER) ~3.0 +/-30% +/-30%
Ω Ω
Check Check TMAP TMAP connector connector and
signal wiring for an open circuit signal wiring for an open circuit
Corrective Action, Corrective Action, First First Check
Check TMAP connector and MAP Check TMAP connector and MAP
signal wiring for a shorted circuit signal wiring for a shorted circuit
ng for
between
that the the
calculated calculated
transient transient
test by test by
key key and and
for a a
throttle throttle
and MAP MAP
Check