MTU 12 V 4000 M23F Operating Instructions Manual page 145

446 – SD P-HD2
Signal error, rail pressure sensor
Yellow alarm; high-pressure regulator emergency operation
Cause
Rail pressure sensor faulty.
Short circuit or wire break.
448 – HI P-Charge Air
Charge-air pressure too high (limit value 1)
Yellow alarm; warning
Cause
Fault at turbine bypass flap.
449 – SS P-Charge Air
Charge-air pressure too high (limit value 2)
Red alarm; engine shutdown
Cause
Fault at turbine bypass flap.
450 – SD Idle/End-Torque Input [%]
Signal error, start/end torque
Yellow alarm; warning
Cause
Input signal for start/end torque
faulty.
Short circuit or wire break.
ZKP-Number: 1.8004.599
Corrective action
1. Check sensor and wiring (B48), replace as necessary
(→ Page 265).
2. Contact Service.
ZKP-Number: 2.0103.931
Corrective action
u Contact Service.
ZKP-Number: 2.0103.932
Corrective action
u Contact Service.
ZKP-Number: 2.8006.592
Corrective action
1. Check signal transmitter and wiring, replace as necessary.
(→ Page 265)
2. Fault is rectified when engine is restarted (→ Page 77).
3. Contact Service.
MS150068/01E 2014-01 | Troubleshooting | 145