JLG 400S Service And Maintenance Manual page 241

Deutz Blink
SPN FMI
Code Code
4768 2 1881 683
4768 3 1044 683
4768 4 1045 683
5763 3 1024 594
5763 3 1226 594
5763 3 1227 594
5763 4 1025 594
3121671
Table 3-16. Deutz Engine Fault Codes
Description
At engine cold start conditions the sensed
exhaust gas temperature downstream DOC
(Exh_tSensTOxiCatDs)
has exceeded the sum of ambient
tempera-
ture (EnvT_t) + offset (40°C) earlier than
the sensed exhaust gas
temperature upstream of DOC
(Exh_tSensTOxiCatUs).
The check is only performed once each
igni-
tion cycle and only if the start is judged a
cold start.
Error status is frozen for that ignition cycle.
No healing possible.
Oxidation catalyst upstream temperature
sensor: the voltage of sensor measured by
ECU is out of the target range
Oxidation catalyst upstream temperature
sensor: the voltage of sensor measured by
ECU is out of the target range
Actuator of the external EGR valve: the ECU
detects a short circuit to battery or open
load.
Actuator EGR-valve: short cut to battery is
detected
Actuator EGR-valve: short cut to battery on
ECU pin is detected
Actuator of the external EGR valve: the ECU
detects a short circuit to ground.
SECTION 3 - CHASSIS & TURNTABLE
Possible Cause
Difference temperature of exhaust gas
temper- ature downstream DOC and fixed
ambient temperature at ignition on exceeds a
certain limit earlier than the difference
temperature of exhaust gas temperature
upstream DOC and fixed ambient temperature
at ignition on.
The sensed raw voltage value
Exh_uRawTOxiCatUs is above
Exh_SRCTOxiCatUs.uMax_C Shortcut to
battery
The sensed raw voltage value
Exh_uRawTOxiCatUs is
below Exh_SRCTOxiCatUs.uMin_C Shortcut to
ground
Short cut to battery or open loop.
Short-Circuit to battery on component wiring Threshold for error detection is an internal ECU
Short-Circuit to battery on component wiring Threshold for error detection is an internal ECU
Short cut to ground
Action
Check whether all exhaust gas temperature
sensors within the EAT system are
mounted properly: Within the exhaust line
and
at correct positions.
Check the position of the sensor upstream SCR
which might be physically mounted in the
wrong position.
If cold start condition can be made sure
(engine was off for at least 8 h) compare
values of EnvT_t, EngDa_tEng,
Exh_TOxiCatUs, Exh_tOxiCatDs and
SCR_tSensUCatUsT at ignition on, without
starting the engine. All identical? Then the
sensors itself are okay.
Check exhaust piping for leakage.
Check wiring of sensors
Replace sensors
Check DOC => physically intact?
Check wiring harness to temperature sensor
upstream DOC
Exchange temperature sensor upstream DOC
Check wiring harness to temperature sensor
upstream DOC
Exchange temperature sensor upstream DOC
Check cabling, actuator defect, check actuator
and if necessary replace it, check
connection cable and if necessary repair or
replace it.
threshold.
Check wiring, component, ECU
Check repair with SerDia 2010 use case
threshold.
Check wiring, component, ECU
Check repair with SerDia 2010 use case
Check cabling, actuator defect, check actuator
and if necessary replace it, check
connection cable and if necessary repair or
replace it.
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