Doosan D50S-5 Operation & Maintenance Manual page 104

ECTRangeLow ECTRangeLow
141 141
Coolant Sensor failure or Coolant Sensor failure or
(14) (14)
shorted to GND shorted to GND
ECTRangeHigh ECTRangeHigh
151 151
Coolant sensor disconnected Coolant sensor disconnected
(15) (15)
or open circuit or open circuit
ECTOverTempFault ECTOverTempFault
Engine coolant temperature Engine coolant temperature
is high. The sensor has is high. The sensor has
161 161
(16) (16) measured an excessive measured an excessive
coolant temperature typically coolant temperature typically
due to the engine due to the engine
overheating. overheating.
ECT_IR_Fault ECT_IR_Fault
Engine coolant temperature Engine coolant temperature
171 171
not changing as expected not changing as expected
FuelSelectConflict FuelSelectConflict
Conflict in fuel select signals, Conflict in fuel select signals,
181 181 normally set if both of the normally set if both of the
fuel select signals are fuel select signals are
shorted to ground shorted to ground
CrankEdgesFault CrankEdgesFault
No crankshaft signal when No crankshaft signal when
engine is known to be engine is known to be
193 193
rotating, broken crankshaft rotating, broken crankshaft
sensor leads or defective sensor leads or defective
crank sensor crank sensor
(*) Fault actions shown are default values specified by (*) Fault actions shown are default values specified by the OEM.
Operation Section Operation Section
Table 2. Table 2. MI-07 Diagnostic Fault Codes (Flash Codes) cont'd MI-07 Diagnostic Fault Codes (Flash Codes) cont'd
DFC DFC
CrankSyncFault CrankSyncFault
Loss of synchronization on Loss of synchronization on
the crankshaft sensor, the crankshaft sensor,
194 194
normally due to noise on the normally due to noise on the
PROBABLE FAULT PROBABLE FAULT
Check ECT sensor connector and Check ECT sensor connector and
wiring for a short to GND wiring for a short to GND
SECM (Signal) Pin B15 To ECT Pin 3 SECM (Signal) Pin B15 To ECT Pin 3
TurnOnMil TurnOnMil
SECM (Sensor GND) Pin B1 to ECT SECM (Sensor GND) Pin B1 to ECT
Pin 1 Pin 1
SECM (System GND) Pin A16, B17 SECM (System GND) Pin A16, B17
Check if ECT sensor connector is Check if ECT sensor connector is
(1) TurnOnMil (1) TurnOnMil
disconnected or for an open ECT circuit disconnected or for an open ECT circuit
(2) DelayedEngine (2) DelayedEngine
SECM (Signal) Pin B15 to ECT Pin 3 SECM (Signal) Pin B15 to
Shutdown Shutdown
SECM (Sensor GND) Pin B1 to SECM (Sensor GND) Pin B1 to
(3) CheckEngineLight (3) CheckEngineLight
ECT Pin 1 ECT Pin 1
Check coolant system for radiator Check coolant system for radiator
blockage, proper coolant level and for blockage, proper coolant level and for
leaks in the system. leaks in the system.
(1) TurnOnMil (1) TurnOnMil Possible ECT short to GND, check Possible ECT short to GND, check
(2) DelayedEngine (2) DelayedEngine ECT signal wiring ECT signal wiring
Shutdown Shutdown SECM (Signal) Pin B15 to SECM (Signal) Pin B15 to ECT Pin 3
(3) CheckEngineLight (3) CheckEngineLight SECM (Sensor GND) Pin B1 to SECM (Sensor GND) Pin B1 to
ECT Pin 1 ECT Pin 1
SECM (System GND) Pin A16, B17 SECM (System GND) Pin A16, B17
Check regulator for coolant leaks Check regulator for coolant leaks
Check for coolant system problems, Check for coolant system problems,
None None
e.g. defective or stuck thermostat e.g. defective or stuck thermostat
Check fuel select switch connection for Check fuel select switch connection for
a short to GND a short to GND
TurnOnMil TurnOnMil
SECM (SIGNAL) Pin A12 SECM (SIGNAL) Pin A12
SECM (SIGNAL) Pin A15 SECM (SIGNAL) Pin A15
SECM (Sensor GND) Pin B1 SECM (Sensor GND) Pin B1
Check Crankshaft sensor connections Check Crankshaft sensor connections
SECM (SIGNAL) Pin B5 to Crank SECM (SIGNAL) Pin B5 to Crank
sensor Pin 3 sensor Pin 3
None None
SECM (Sensor GND) PIN B1 to Crank SECM (Sensor GND) PIN B1 to Crank
sensor Pin 2 sensor Pin 2
Switched 12V to Crank sensor Pin 1 Switched 12V to Crank sensor Pin 1
Check for defective Crank sensor Check for defective Crank sensor
the OEM.
103 103
FAULT ACTION* FAULT ACTION*
None None
. .
CORRECTIVE ACTION CORRECTIVE ACTION
FIRST CHECK FIRST CHECK
Check Crankshaft sensor connections Check Crankshaft sensor connections
SECM (SIGNAL) Pin B5 to Crank SECM (SIGNAL) Pin B5 to Crank
sensor Pin 3 sensor Pin 3
SECM (Sensor GND) Pin B1 to Crank SECM (Sensor GND) Pin B1 to Crank
ECT Pin 3
ECT Pin 3