MTU MS15027/02E Operating Instuctions page 139

650 – Al Req Angle Throttle B
Yellow alarm.
Associated parameter 2.1200.936
Cause
Throttle B opening angle
exceeded.
651 – AL Preheating Error
Yellow alarm.
Associated parameter 1.1480.101
Cause
Engine pre-heating faulty.
652 – AL Transmission Comm Lost
Red alarm.
Associated parameter 1.4510.996
Cause
CAN bus communication to
knock control faulty.
653 – AL IC92x Comm Lost
Red alarm.
Associated parameter 1.4520.996
Cause
CAN bus communication to
ignition system faulty.
654 – AL FSeries Comm Lost
Red alarm.
Associated parameter 1.4530.996
Cause
CAN bus communication to
bypass valve faulty.
Corrective action
1. Check charge pressure reserve.
2. Intake air temperature not as per TVU data.
3. Check compressor for contamination.
4. Reduce power.
Corrective action
1. Low coolant.
2. Lack of differential pressure in coolant system.
3. Coolant pump does not start, is faulty.
Corrective action
1. Check cabling.
2. Check power supply.
3. Restart ECU, EMU & knock control.
4. Check settings using device-specific dialog software (XD10).
Corrective action
u Check data record.
Corrective action
1. Check cabling.
2. Check power supply.
3. Restart ECU, EMU & bypass valve.
4. Check settings using device-specific dialog software (XD50.3).
MS15027/02E 2015-04 | Troubleshooting | 139