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431 – SS P-Coolant before Engine
Red alarm. Engine stop.
Associated parameter 2.0168.922
Cause
Corrective action
Coolant pressure before engine
too low (limit value 2). Flow too
low, 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,
flow too low, air in engine
cooling system.
u
Check engine coolant circuit (pressure and flow).
435 – SS T-Coolant Before Engine
Red alarm. Engine stop.
Associated parameter 2.0173.932
Cause
Corrective action
Coolant temperature before
engine too high (limit value 2).
Engine coolant pump failure,
flow too low, air in engine
cooling system.
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 defective.
u
Check sensor and cabling, replace as necessary. Fault is
rectified following engine restart.
MS15026/00E 2015-05
| Troubleshooting | 127
TIM-ID: 0000044567 - 003