MTU 8 V 4000 Lx2 xx Operating Instructions Manual page 109

418 – SD T-Intake Air B
Yellow alarm.
Associated parameter 1.8004.603
Cause
Intake air temperature sensor
defective, short circuit or wire
break.
419 – SD T-Coolant before Engine
Red alarm.
Associated parameter 1.8004.604
Cause
Coolant temperature sensor at
engine inlet defective, short
circuit or wire break.
423 – LO P-Coolant Diff.
Red alarm. Engine shutdown.
Associated parameter 2.0180.921
Cause
Coolant differential pressure too
low (limit value 1). Insufficient
volume flow.
429 – HI P-Coolant
Red alarm. Engine shutdown.
Associated parameter 2.0101.931
Cause
Coolant pressure after engine
too high (limit value 3).
430 – LO P-Coolant before Engine
Yellow alarm.
Associated parameter 2.0168.921
Cause
Coolant pressure before engine
too low (limit value 1).
Insufficient volume flow, static
pressure too low.
Corrective action
u Check sensor and cabling (B49.2), replace as necessary.
Corrective action
u Check sensor and cabling (B6.3), replace as necessary.
Corrective action
u Check engine coolant circuit (pressure and flow).
Corrective action
u Check engine coolant circuit (pressure and flow).
Corrective action
u Check engine coolant circuit (pressure and flow).
MS150114/01E 2015-03 | Troubleshooting | 109