Doosan D20S-5 Operation & Maintenance Manual page 107

Table 2. 2. Diagnostic Table Diagnostic Fault
DF DFC C
IATRangeHigh IATRangeHigh
Intake Air Temperature Intake Air Temperature
Sensor Input is High normally Sensor Input is High normally
381 381
(38) (38) set if the IAT temperature set if the IAT temperature
sensor wire has been sensor wire has been
disconnected or disconnecte
opened to the SECM. opened to the SECM.
IAT_IR_Fault IAT_IR_Fault
391 391 Intake Air Temperature not Intake Air Temperature not
changing as expected changing as expected
EST1_Open EST1_Open
EST1 output open, possibly EST1 output open, possibly
421 421
open EST1 signal or defective open EST1 signal or defective
spark module spark module
EST2_Open EST2_Open
EST2 output open, possibly EST2 output open, possibly
422 422
open EST2 signal or defective open EST2 signal or defective
spark module spark module
EST3_Open EST3_Open
423 423 EST3 output open, possibly EST3 output open, possibly
open EST3 signal or defective open EST3 signal or defective
spark module spark module
(*) 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
d or the circuit has the circuit has
-104- -104-
sh Codes) odes) cont'd. cont'd.
FA FAULT ULT AC ACTI TION ON * * CORR CO
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.
Check connections to TMAP sensor. Check Check connections to TMAP sensor. Check
None None that TMAP sensor is properly mounted to that TMAP sensor is properly mounted to
manifold. manifold.
Check coil driver wiring and connector for open Check coil driver wiring and connector for open
circuit circuit
SECM Pin A9 (EST1) to OEM ignition system. SECM Pin A9 (EST1) to O
See application note. See application note.
Verify GND on ignition module Verify GND on ignition module
TurnOnMil TurnOnMil
Pin A (of both connectors) Pin A (of both connectors)
Verify +12 Vdc on ignition module Verify +12 Vdc on ignition module
Pin B (of both connectors) Pin B (of both connectors)
Refer to application manual for specific engine Refer to application manual for s
details. details.
Check coil driver wiring and connector for open Check coil driver wiring and connector for open
circuit circuit
SECM Pin A10 (EST2) to SECM Pin A10 (EST2) to OEM ignition
system. See application note. system. See application note.
Verify GND on ignition module Verify GND on ignition module
TurnOnMil TurnOnMil
Pin A (of both connectors) Pin A (of both connectors)
Verify +12 Vdc on ignition module Verify +12 Vdc on ignition module
Pin B (of both connectors) Pin B (of both connectors)
Refer to application manual for s Refer to application manual for specific engine
details. details.
Check coil driver wiring and connector for open Check coil driver wiring and connector for open
circuit circuit
SECM Pin A3 (EST3) to OEM ignition system. SECM Pin A3 (EST3) to O
See application note. See application note.
TurnOnMil TurnOnMil Verify GND on ignition module Verify GND on ignition module
Pin A (of both connectors) Pin A (of both connectors)
Verify +12 Vdc on ignition module Verify +12 Vdc on ignition module
Pin B (of both connectors) Pin B (of both connectors)
Refer to application manual for specific engine Refer to application manual for s
details. details.
Operation Section Operation Section
RREC ECTI TIVE VE AC ACTI TION ON FI FIRS RST T CH
to SECM Pin B1 (sensor GND)
EM ignition system.
pecific engine
OEM ignition
pecific engine
EM ignition system.
pecific engine
CHE E CK CK
wiring