Daewoo Bus BS Series, Owner'S Manual

Page: 244 / 260

7-54
FAULTY DIAGNOSIS
Fault
Code
LAMP REASON EFFECT
1691
1695
1696
1843
1844
1866
1876
1877
1878
1879
1881
1883
1893
1895
Amber
Amber
Amber
Amber
Amber
Amber
Amber
Amber
Amber
Amber
Amber
Amber
Amber
Amber
The temperature increase across the aftertreatment diesel
oxidation catalyst is lower than expected
High voltage detected at sensor supply number 5 circuit in the
OEM harness
Low voltage detected at sensor supply number 5 circuit in the
OEM harness
High signal voltage detected at the crankcase pressure circuit
Low signal voltage detected at the crankcase pressure circuit
An error in the EGR delta pressure signal was detected at initial
key-on or the sensor failed the auto-zero test
High signal voltage detected at the catalyst inlet temperature
sensor circuit
Low signal voltage detected at the aftertreatment diesel
particulate filter outlet temperature sensor circuit
The temperature diesel oxidation catalyst inlet temperature
sensor is not changing with engine operating conditions
High signal voltage detected at the aftertreatment differential
pressure sensor circuit
Low signal voltage or open circuit detected at the aftertreatment
differential pressure sensor circuit
The aftertreatment diesel particulate filter differential pressure
sensor is reading an erratic value at initial key-on or during
engine operation
No communications or invalid data transfer rate detected on the
J1939 datalink between the ECM and the smart EGR valve
A calibration mismatch between the EGR valve and the ECM
has been detected
None on performance.
Severe derate in power output of the engine.
Limp home power only.
Severe derate in power output of the engine.
Limp home power only.
No engine protection for high crankshaft pressure.
No engine protection for high crankshaft pressure.
EGR valve actuation will be disabled.
None on performance.
None on performance.
None on performance.
Active aftertreatment diesel particulate filter
regeneration will be disabled.
Active aftertreatment diesel particulate filter
regeneration will be disabled.
Active aftertreatment diesel particulate filter
regeneration will be disabled.
EGR valve actuation will be disabled.
EGR valve actuation will be disabled.