Doosan D20S-5 Operation & Maintenance Manual page 106

Operation Section Operation Section
Table 2. 2. Diagnostic Table Diagnostic Fault
DF DFC C
MAPTimeRangeHigh MAPTimeRangeHigh
Manifold Absolute Pressure Manifold Absolute Pressure
Sensor Input is High, normally Sensor Input is High, normally
set if the TMAP pressure set if the TMAP pressure
341 341 signal wire has become signal wire has become
shorted to power, shorted to shorted to power, shorted to
(34) (34)
the IAT signal, the TMAP has the IAT signal, the TMAP has
failed or the SECM has failed. failed or the
MAPRangeHigh MAPRangeHigh
Manifold Absolute Pressure Manifold Absolute Pressure
Sensor Input is High, normally Sensor Input is High, normally
set if the TMAP pressure set if the TMAP pressure
signal wire has become signal wire has become
shorted to power, shorted to shorted to power, shorted to
342 342
the IAT signal, the TMAP has the IAT signal, the TMAP has
failed or the SECM has failed failed or the
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
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 sensor chassis ground or the sensor
has failed. has failed.
(*) Fault actions shown are default values specified by the OEM. (*) Fault actions shown are default values specified by the OEM.
Fault Codes (Fla Codes (Flash C
PROBA PR OBABL BLE E FA FAULT ULT
SECM has failed.
SECM has failed
normally
-103- -103-
sh Codes) odes) cont'd. cont'd.
FA FAULT ULT AC ACTI TION ON * * CORR CO
Check TMAP connector and MAP signal wiring Check TMAP connector and MAP signal wiring
for a shorted circuit for a shorted circuit
TMAP Pin 4 to SECM Pin B18 (signal) TMAP Pin 4 to SECM Pin B18 (signal)
TMAP Pin 1 TMAP Pin 1 to SECM Pin B1 (sensor GND)
TMAP Pin 3 to SECM Pin B24 (XDRP +5 Vdc) TMAP Pin 3 to SECM Pin B24 (XDRP +5 Vdc)
Check the MAP sensor Check the MAP sensor by disconnect-ing the
TurnOnMil TurnOnMil
TMAP connector and measuring at the TMAP connector and measuring at the sensor:
TMAP Pin 1(GND) to TMAP Pin 1(GND) to
Pin 4 (pressure signal KPA) (2.4k Pin 4 (pressure signal KPA) (2.4k
TMAP Pin 3 (power) to TMAP Pin 3 (power) to
Pin 4 (pressure signal KPA) (3.4k Pin 4 (pressure signal KPA) (3.4k
Check TMAP connector and MAP signal wiring Check TMAP connector and MAP signal wiring
for a shorted circuit for a shorted circuit
TMAP Pin 4 to SECM Pin B18 (signal) TMAP Pin 4 to SECM Pin B18 (signal)
TMAP Pin 1 to SECM Pin B1 (sensor GND) TMAP Pin 1 to SECM Pin B1 (sensor GND)
TMAP Pin 3 to SECM Pin B24 (XDRP +5 Vdc) TMAP Pin 3 to SECM Pin B24 (XDRP +5 Vdc)
(1) TurnOnMil (1) TurnOnMil
Check the MAP sensor by disconnecting the Check the MAP sensor
(2) Engine (2) Engine
TMAP connector and measuring at the sensor: TMAP connector and measuring at the
Shutdown Shutdown
TMAP Pin 1(GND) to TMAP Pin 1(GND) to
Pin 4 (pressure signal KPA) (2.4k Pin 4 (pressure signal KPA) (2.4k
TMAP Pin 3 (power) to TMAP Pin 3 (power) to
Pin 4 (pressure signal KPA) (3.4k Pin 4 (pressure signal KPA) (3.4k
Check for vacuum leaks. Check Check for vacuum leaks. Check that TMAP
sensor is mounted properly. Possible defectiv sensor is
TurnOnMil TurnOnMil
TMAP sensor. TMAP sensor.
TurnOnMil TurnOnMil Possible defective Possible
Check that TMAP sensor is mounted properly. Check that TMAP sensor is
TurnOnMil TurnOnMil
Possible defective TMAP sensor. Possible defective TMAP sensor.
Check TMAP connector and IAT signal wiring Check TMAP connector and IAT signal
for a shorted circuit for a shorted circuit
TMAP Pin 2 to SECM Pin B12 (signal) TMAP Pin 2 to SECM Pin B12 (signal)
TMAP Pin 1 to SECM Pin B1 (sensor GND) TMAP Pin 1
TurnOnMil TurnOnMil To check the IAT sensor of the TMAP To check the IAT sensor of the TMAP
disconnect the TMAP connector and measure disconnect the TMAP connector and measure
the IAT resistance the IAT resistance
Resistance is approx 2400 ohms at room Resistance is approx 2400 ohms at room
temperature. temperature.
RREC ECTI TIVE VE AC ACTI TION ON FI FIRS RST T CH
to SECM Pin B1 (sensor GND)
by disconnect-ing the
by disconnecting the
that TMAP
mounted properly. Possible defective e
defective TMAP TMAP sensor. sensor.
mounted properly.
to SECM Pin B1 (sensor GND)
CHE E CK CK
sensor:
- 8.2k - 8.2k ) )
Ω Ω Ω Ω
- 8.2k - 8.2k ) )
Ω Ω Ω Ω
sensor:
- 8.2k - 8.2k ) )
Ω Ω Ω Ω
- 8.2k - 8.2k ) )
Ω Ω Ω Ω
wiring