MTU MW15406/17E Operating Instructions Manual page 122

AL Output Stage Bank 2 Fault
Cause
Fault message of power output
stage, cylinder bank B
AL Gear Control Fail GCU
Cause
GCU fault.
AL Gear Oil Filter Clogged
Cause
Gear oil filter clogged.
AL Override Activated
Cause
Safety system override is active.
AL Power Failure Control
Cause
Power failure of control system.
AL Power Failure Monitoring
Cause
Power failure.
AL Transistor Output 1/2 Fail
Cause
One of the ECU 4 transistor
outputs (TAA1 or TAA2)
defective.
AL Transistor Output 3/4 Fail
Cause
One of the ECU 4 transistor
outputs (TAA3 or TAA4)
defective.
122 | Troubleshooting | MW15406/17E 2014-05
Corrective action
1. Check LOP visually (→ Page 223).
2. Perform LOP test procedures (→ Page 225).
3. Check ECU plug-in connections (→ Page 218).
4. Check engine wiring (→ Page 214).
5. Contact Service.
• have ECU checked and replaced, if required.
Corrective action
u Contact Service.
• Have GCU solenoid checked and replaced, if required.
• Have GCU wiring checked and replaced, if required .
Corrective action
u Clean gear-oil filter and replace, if required (see gearbox
documentation).
Corrective action
u Status message:
• Override activated.
Corrective action
u Check power circuit breakers and fuses.
Corrective action
u Check power circuit breakers and fuses.
Corrective action
u Contact Service.
• have ECU checked and replaced, if required.
Corrective action
u Contact Service.
• have ECU checked and replaced, if required.