AL Gear Control Fail GCU
Cause Corrective action
GCU fault. u Contact Service.
• Have GCU solenoid checked and replaced, if required.
• Have GCU wiring checked and replaced, if required .
AL Gear Oil Filter Clogged
Cause Corrective action
Gear oil filter clogged. u Clean gear-oil filter and replace, if required (see gearbox
documentation).
AL Override Activated
Cause Corrective action
Safety system override is active. u Status message:
• Override activated.
AL Power Failure Control
Cause Corrective action
Power failure of control system. u Check power circuit breakers and fuses.
AL Power Failure Monitoring
Cause Corrective action
Power failure. u Check power circuit breakers and fuses.
AL Transistor Output 1/2 Fail
Cause Corrective action
One of the ECU 4 transistor
outputs (TAA1 or TAA2) defective.
u Contact Service.
• have ECU checked and replaced, if required.
AL Transistor Output 3/4 Fail
Cause Corrective action
One of the ECU 4 transistor
outputs (TAA3 or TAA4) defective.
u Contact Service.
• have ECU checked and replaced, if required.
AL Water in Fuel Prefilter
Cause Corrective action
Water in fuel prefilter. u Drain fuel prefilter (→ Page 93).
56 | Troubleshooting | MW15409/04E 2015-08
TIM-ID: 0000042361 - 001
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