Doosan D50S-5 Operation & Maintenance Manual page 108

pressure signal wire has pressure signal wire has
become shorted to power, become shorted to power,
shorted to the IAT signal, the shorted to the IAT signal, the
342 342
TMAP has failed or the TMAP has failed or the
SECM has failed SECM has failed
MAP_IR_HI MAP_IR_HI
351 351 MAP sensor indicates higher MAP sensor indicates higher
pressure than expected pressure than expected
MAP_IR_LO MAP_IR_LO
352 352 MAP sensor indicates lower MAP sensor indicates lower
pressure than expected pressure than expected
MAP_STICKING MAP_STICKING
353 353
MAP sensor not changing as MAP sensor not changing as
expected expected
IATRangeLow IATRangeLow
Intake Air Temperature Intake Air Temperature
Sensor Input is Low normally Sensor Input is Low normally
371 371
set if the IAT temperature set if the IAT temperature
(37) (37)
sensor wire has shorted to sensor wire has shorted to
chassis ground or the chassis ground or the sensor
has failed. has failed.
IATRangeHigh IATRangeHigh
Intake Air Temperature Intake Air Temperature
Sensor Input is High Sensor Input is High
381 381 normally set if the IAT normally set if the IAT
(38) (38)
temperature sensor wire has temperature sensor wire has
been disconnected or the been disconnected or the
circuit has opened to the circuit has opened to the
SECM. SECM.
IAT_IR_Fault IAT_IR_Fault
391 391
Intake Air Temperature not Intake Air Temperature not
changing as expected changing as expected
(*) 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
EST1_Open EST1_Open
sensor
PROBABLE FAULT PROBABLE FAULT
(sensor GND) (sensor GND)
TMAP Pin 3 to SECM Pin B24 TMAP Pin 3 to SECM Pin
(1) TurnOnMil (1) TurnOnMil (XDRP +5 Vdc) (XDRP +5 Vdc)
(2) CutThrottle (2) CutThrottle
Check the MAP sensor by Check the MAP sensor by
disconnecting the TMAP connector disconnecting the TMAP connector
and measuring at the sensor: and measuring at the sensor:
TMAP Pin 1(GND) to Pin 4 (pressure TMAP Pin 1(GND) to Pin 4 (p
signal KPA) (2.4k signal KPA) (2.4k
TMAP Pin 3 (power) to Pin 4 (pressure TMAP Pin 3 (power) to Pin 4 (pressure
signal KPA) (3.4k signal KPA) (3.4k
Check for vacuum leaks. Check that Check for vacuum leaks. Check that
None None
TMAP sensor is mounted properly. TMAP sensor is mounted properly.
Possible defective TMAP sensor. Possible defective TMAP
None None
Possible defective TMAP sensor. Possible defective TMAP
Check that TMAP sensor is mounted Check that TMAP sensor is
None None
properly. Possible defective TMAP properly. Possible defective TMAP
sensor. sensor.
Check TMAP connector and IAT signal Check TMAP connector and IAT signal
wiring for a shorted circuit wiring for a shorted circuit
TMAP Pin 2 to SECM Pin B12 (signal) TMAP Pin 2 to SECM Pin
TMAP Pin 1 to SECM Pin B1 TMAP Pin 1 to SECM Pin B1
(sensor GND) (sensor GND)
TurnOnMil TurnOnMil
To check the IAT sensor of the TMAP To check the IAT sensor of the TM
disconnect the TMAP connector and disconnect the TMAP connector and
measure the IAT resistance measure the IAT resistance
Resistance is approx 2400 ohms at Resistance is approx 2400 ohms at
room temperature. room temperature.
Check TMAP connector and IAT signal Check TMAP connector and IAT signal
wiring for a shorted circuit wiring for a shorted circuit
TMAP Pin 2 to SECM Pin TMAP Pin 2 to SECM Pin B12 (signal)
TMAP Pin 1 to SECM Pin B1 TMAP Pin 1 to SECM Pin B1
(sensor GND) (sensor GND)
TurnOnMil TurnOnMil
To check the IAT sensor of the TMAP To check the IAT sensor of the TM
disconnect the TMAP connector and disconnect the TMAP connector and
measure the IAT resistance measure the IAT resistance
Resistance is approx 2400 ohms at Resistance is approx 2400 ohms at
room temperature. room temperature.
Check connections to TMAP sensor. Check connections to TMAP sensor.
None None
Check that TMAP sensor is properly Check that TMAP sensor is properly
mounted to manifold. mounted to manifold.
the OEM.
107 107
. .
FAULT ACTION FAULT ACTION * *
Check coil driver wiring and connector Check coil driver wirin
for open circuit for open circuit
SECM Pin A9 (EST1) to OEM ignition SECM Pin A9 (EST1) to OEM ignition
system. See application note. system. See application note.
B24
ressure
- 8.2k - 8.2k ) )
Ω Ω Ω Ω
- 8.2k - 8.2k ) )
Ω Ω Ω Ω
sensor.
sensor.
mounted
B12 (signal)
B12 (signal)
CORRECTIVE ACTION CORRECTIVE ACTION
FIRST CHECK FIRST CHECK
g and connector
AP
AP