MTU 16V4000Lx2x Operating Instructions Manual page 126

650 – Al Req Angle Throttle B
Red alarm.
Associated parameter 2.1200.936
Cause
Opening angle of throttles B
exceeded.
651 – AL Preheating Error
Yellow alarm.
Associated parameter 1.1480.101
Cause
Engine preheating faulty.
652 – AL GET Comm Lost
Red alarm.
Associated parameter 1.4510.996
Cause
CAN bus communication for
knock control faulty.
653 – AL IC92x Comm Lost
Red alarm.
Associated parameter 1.4520.996
Cause
CAN bus communication for
ignition system faulty.
654 – AL FSeries Comm Lost
Red alarm.
Associated parameter 1.4530.996
Cause
CAN bus communication for
bypass flap faulty.
126 | Troubleshooting | MS150121/00E 2015-07
Corrective action
1. Check charge-air pressure reserve.
2. Intake air temperature outside TVU data.
3. Check compressor for contamination.
4. Reduce power.
Corrective action
1. Low coolant.
2. Missing differential pressure in coolant system.
3. Coolant pump does not start, is faulty.
Corrective action
1. Check cabling.
2. Check power supply.
3. Carry out restart of ECU, EMU & knock control.
4. Check settings with device-specific dialog software (XD10).
Corrective action
1. Check cabling.
2. Check power supply.
3. Carry out restart of ECU, EMU & knock control.
4. Check settings with device-specific dialog software (in device).
Corrective action
1. Check cabling.
2. Check power supply.
3. Carry out restart of ECU, EMU & bypass flap.
4. Check settings with device-specific dialog software (XD50.3).