MTU 12 V 4000 M23F Operating Instructions Manual page 120

241 – SD T-Recirculation
Cause
Recirculation sensor faulty;
Short circuit or wire break.
242 – SD T-Coolant (R)
Cause
Redundant coolant pressure
sensor faulty; Short circuit or
wire break.
244 – SD P-Lube Oil (R)
Cause
Redundant lube oil pressure
sensor faulty; Short circuit or
wire break.
245 – SD ECU Power Supply Voltage
Signal error, engine governor supply voltage
Yellow alarm; warning
Cause
Internal ECU fault. Electronics
faulty.
266 – SD Speed Demand
Speed setting signal error
Red alarm; forced idle
Cause
Analog speed setpoint faulty.
Short circuit or wire break.
120 | Troubleshooting | MS150068/01E 2014-01
ZKP-Number: 1.8004.581
Corrective action
u Check sensor and wiring (B49), replace as necessary.
Fault is rectified following engine restart.
ZKP-Number: 1.8004.622
Corrective action
u Check sensor and wiring, replace as necessary.
Fault is rectified following engine restart.
ZKP-Number: 1.8004.621
Corrective action
u Check sensor and wiring, replace as necessary.
Fault is rectified following engine restart.
ZKP-Number: 2.8006.589
Corrective action
1. Replace Engine Control Unit.
2. Contact Service.
ZKP-Number: 2.8006.586
Corrective action
1. Check speed setting transmitter and wiring, replace as
necessary (→ Page 265).
2. Fault is rectified when engine is restarted (→ Page 77).
3. Contact Service.