431 – SS P-Coolant before Engine
Red alarm. Engine shutdown.
Associated parameter 2.0168.922
Cause
Corrective action
Coolant pressure before engine
too low (limit value 2).
Insufficient volume flow, static
pressure too low.
u
Check engine coolant circuit (pressure and flow).
434 – HI T-Coolant before Engine
Yellow alarm.
Associated parameter 2.0173.931
Cause
Corrective action
Coolant temperature before
engine too high (limit value 1).
Engine coolant pump failure,
volumetric flow too low, air in
engine coolant circuit.
u
Check engine coolant circuit (pressure and flow).
435 – SS T-Coolant before Engine
Red alarm. Engine shutdown.
Associated parameter 2.0173.932
Cause
Corrective action
Coolant temperature before
engine too high (limit value 2).
Engine coolant pump failure,
volumetric flow too low, air in
engine coolant circuit.
u
Check engine coolant circuit (pressure and flow).
443 – HI P-Charge Mix Diff.
Yellow alarm.
Associated parameter 2.0183.931
Cause
Corrective action
Difference in mixture pressures
sensed on A and B side is too
high (limit value 1).
1. Check throttles for varying positions and malfunction.
2. Check mixture lines for leakage.
3. Check sensors and cabling (B79.22, B79.21).
445 – SD P-Ambient Air
Yellow alarm.
Associated parameter 1.8004.580
Cause
Corrective action
Ambient air pressure sensor on
ECU faulty.
u
Check sensor and cabling, replace as necessary. Fault is
rectified following engine restart.
110 | Troubleshooting | MS150114/01E 2015-03
TIM-ID: 0000044738 - 001