7.2 LOP fault messages
AL RCS Speed Demand Defect
Cause Corrective action
No speed demand signal. 1. Check remote control system.
2. Check LOP visually (→ Page 151).
3. Perform LOP test procedures (→ Page 153).
4. Check ECU plug-in connections (→ Page 147).
5. Check engine wiring (→ Page 143).
AL Battery Charger Failure
Cause Corrective action
Battery not being charged. 1. Check power circuit breakers and fuses.
2. Check transistorized regulator.
3. Check drive belt (→ Page 138).
AL Press. Monitoring Fail (EMU)
Cause Corrective action
EMU pressure monitoring failure. u Contact Service.
• Have EMU replaced.
AL ECU Defective
Cause Corrective action
ECU 4 is defective. 1. Check LOP visually (→ Page 151).
2. Perform LOP test procedures (→ Page 153).
3. Check ECU plug-in connections (→ Page 147).
4. Check engine wiring (→ Page 143).
5. Contact Service.
• have ECU checked and replaced, if required.
AL Output Stage Bank 1 Fault
Cause Corrective action
Fault message of power output
stage, cylinder bank A
1. Check LOP visually (→ Page 151).
2. Perform LOP test procedures (→ Page 153).
3. Check ECU plug-in connections (→ Page 147).
4. Check engine wiring (→ Page 143).
5. Contact Service.
• have ECU checked and replaced, if required.
AL Output Stage Bank 2 Fault
Cause Corrective action
Fault message of power output
stage, cylinder bank B
1. Check LOP visually (→ Page 151).
2. Perform LOP test procedures (→ Page 153).
3. Check ECU plug-in connections (→ Page 147).
4. Check engine wiring (→ Page 143).
5. Contact Service.
• have ECU checked and replaced, if required.
MW15409/04E 2015-08 | Troubleshooting | 55
TIM-ID: 0000042361 - 001
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