419 – SD T-Coolant b. Engine
ZKP-Number:
Red alarm.
Associated parameter 1.8004.604
Cause
Corrective action
Coolant temperature sensor at
engine inlet defective, short
circuit or wire break.
u
Check sensor and cabling (B6.3), replace if necessary.
423 – LO P-Coolant Diff.
ZKP-Number:
Red alarm. Engine shutdown.
Associated parameter 2.0180.921
Cause
Corrective action
Coolant differential pressure too
low. Volumetric flow too low.
u
Check engine coolant circuit (pressure and volumetric flow).
429 – HI P-Coolant
ZKP-Number:
Red alarm. Engine shutdown.
Associated parameter 2.0101.931
Cause
Corrective action
Coolant pressure after engine
too high (limit value 3).
u
Check engine coolant circuit (pressure and volumetric flow).
430 – LO P-Coolant before Engine
ZKP-Number:
Yellow alarm.
Associated parameter 2.0168.921
Cause
Corrective action
Coolant pressure before engine
too low (limit value 1). Volumetric
flow too low, static pressure too
low.
u
Check engine coolant circuit (pressure and volumetric flow).
120 | Troubleshooting | MS150059/01E 2012-07
TIM-ID: 0000017544 - 001
