Doosan D50S-5 Operation & Maintenance Manual page 109

EST1 output open, possibly EST1 output open, possibly
421 421
open EST1 signal or open EST1 signal or
defective spark module defective spark module
EST1_Short EST1_Short
EST1 output shorted high or EST1 output shorted high or
431 431
low, EST1 signal shorted to low, EST1 signal shorted to
ground or power or defective ground or power or defective
spark module spark module
ETC_Sticking ETC_Sticking
Electronic Throttle Control is Electronic Throttle Control is
sticking. This can occur if t sticking. This can occur if the
throttle plate (butterfly valve) throttle plate (butterfly valve)
inside the throttle bore is inside the throttle bore is
sticking. The plate sticking sticking. The plate sticking
can be due to some type of can be due to some type of
461 461 obstruction, a loose throttle obstruction, a loose throttle
(26) (26)
plate, or worn components plate, or worn components
shaft bearings. shaft bearings.
NOTE: The throttle NOTE:
assembly is not a assembly is not a
serviceable item and can serviceable item and can
only be repaired by only be repaired by
replacing the DV-EV replacing the DV-EV
throttle assembly . . throttle assembly
ETC_Open_Fault ETC_Open_Fault
Electronic Throttle Control Electronic Throttle Control
Driver has failed, normally Driver has failed, normally
set if either of the ETC driver set if either of the ETC driver
471 471
signals have opened or signals have opened or
become disconnected, become disconnected,
electronic throttle or SECM is electronic throttle or SECM is
defective. defective.
(*) Fault actions shown are default values specified by the OEM. (*) Fault actions shown are default values specified by
Table 2. Table 2. MI-07 Diagnostic Fault Codes (Flash Codes) cont'd MI-07 Diagnostic Fault Codes (Flash Codes) cont'd
DFC DFC
ETCSpringTest ETCSpringTest
Electronic Throttle Control Electronic Throttle Control
Spring Return Test has Spring Return Test has
failed. The SECM will failed. The SECM will
he
The throttle
PROBABLE FAULT PROBABLE FAULT
Verify GND on ignition module Pin A Verify GND on ignition module Pin A
TurnOnMil TurnOnMil
(of both connectors) (of both connectors)
Verify +12 Vdc on ignition module Pin Verify +12 Vdc on ignition module Pin
B (of both connectors) B (of both connectors)
Refer to application manual for specific Refer to application manual for specific
engine details. engine details.
Check coil driver wiring and connector Check coil driver wirin
for shorts for shorts
SECM Pin A9 (EST1) to ignition SECM Pin A9 (EST1) to ignition
module Pin D (4-pin connector) module Pin D (4-pin connector)
Verify GND on ignition module Pin A Verify GND on ignition module Pin A
TurnOnMil TurnOnMil
(of both connectors) (of both connectors)
Verify +12 Vdc on ignition module Pin Verify +12 Vdc on ignition module Pin
B (of both connectors) B (of both connectors)
Refer to application manual for specific Refer to application manual for specific
engine details. engine details.
Check for debris or obstructions inside Check for debris or obstructions inside
the throttle body the throttle body
Perform the throttle test using the Perform the throttle test using the
Service Tool and re-check for fault Service Tool and re-check for fault
Check throttle-plate shaft for bearing Check throttle-plate shaft for bearing
wear wear
Check the ETC driver wiring for an Check the ETC driver wiring for an
(1) TurnOnMil (1) TurnOnMil
open circuit open circuit
(2) EngineShutdown (2) EngineShutdown
SECM Pin A17 to ETC + Pin 1 SECM Pin A17 to ETC + Pin 1
(3) CutThrottle (3) CutThrottle
SECM Pin A18 to ETC - Pin 4 SECM Pin A18 to ETC - Pin 4
Check the ETC internal motor drive by Check the ETC internal motor drive by
disconnecting the throttle connector disconnecting the throttle connector
and measuring the motor drive and measuring the motor drive
resistance at the throttle resistance at the throttle
TPS Pin 1 (+DRIVER) to TPS Pin 1 (+DRIVER) to
Pin 4 (-DRIVER) ~3.0-4.0 Pin 4 (-DRIVER) ~3.0-4.0
Check the ETC driver wiring for an Check the ETC driver wiring for an
open circuit open 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
Check the ETC internal motor drive by Check the ETC internal motor drive by
None None
disconnecting the throttle connector disconnecting the throttle connector
and measuring the motor drive and measuring the motor drive
resistance at the throttle resistance at the throttle
TPS Pin 1 (+DRIVER) to TPS Pin 1 (+DRIVER) to
Pin 4 (-DRIVER) ~3.0-4.0 Pin 4 (-DRIVER) ~3.0-4.0
the OEM.
108 108
FAULT ACTION FAULT ACTION * *
g and connector
Ω Ω
Ω Ω
Operation Section Operation Section
. .
CORRECTIVE ACTION CORRECTIVE ACTION
FIRST CHECK FIRST CHECK