Doosan GC15S-5, Руководство по эксплуатации и техническому обслуживанию

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Operation Section
72
Table 2. Diagnostic Fault Codes (Flash Codes) cont’d.
DFC PROBABLE FAULT FAULT ACTION * CORRECTIVE ACTION FIRST CHECK
437
EST7_Short
EST7 output shorted high or
low, EST7 signal shorted to
ground or power or defective
spark module
None N/A
438
EST8_Short
EST8 output shorted high or
low, EST8 signal shorted to
ground or power or defective
spark module
None N/A
461
(26)
ETC_Sticking
Electronic Throttle Control is
sticking. This can occur if the
throttle plate (butterfly valve)
inside the throttle bore is
sticking. The plate sticking can
be due to some type of
obstruction, a loose throttle
plate, or worn components shaft
bearings.
NOTE: The throttle assembly
is not a serviceable item and
can only be repaired by
replacing the DV-EV throttle
assembly.
(1) TurnOnMil
(2) EngineShutdown
(3) CutThrottle
Check for debris or obstructions inside
the throttle body
Perform the throttle test using the
Service Tool and re-check for fault
•
Check throttle-plate shaft for bearing
wear
•
Check the ETC driver wiring for an
open circuit
SECM Pin A17 to ETC + Pin 1
SECM Pin A18 to ETC - Pin 4
Check the ETC internal motor drive by
disconnecting the throttle connector and
measuring the motor drive resistance at
the throttle
TPS Pin 1 (+DRIVER) to
Pin 4 (-DRIVER) ~3.0-4.0
Ω
471
ETC_Open_Fault
Electronic Throttle Control Driver
has failed, normally set if either
of the ETC driver signals have
opened or become
disconnected, electronic throttle
or SECM is defective.
None
Check the ETC driver wiring for an open
circuit
SECM Pin A17 to ETC + Pin 1
SECM Pin A18 to ETC - Pin 4
Check the ETC internal motor drive by
disconnecting the throttle connector and
measuring the motor drive resistance at
the throttle
TPS Pin 1 (+DRIVER) to
Pin 4 (-DRIVER) ~3.0-4.0
Ω
481
(28)
ETCSpringTest
Electronic Throttle Control
Spring Return Test has failed.
The SECM will perform a safety
test of the throttle return spring
following engine shutdown. If
this spring has become weak
the throttle will fail the test and
set the fault.
NOTE: The throttle assembly
is not a serviceable item and
can only be repaired by
replacing the DV-EV throttle
assembly.
(1) TurnOnMil
(2) EngineShutdown
Perform throttle spring test by cycling
the ignition key and re-check for fault
(*) Fault actions shown are default values specified by the OEM.