MTU 8 V 4000 Lx2 xx Operating Instructions Manual page 122

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.
655 – AL TecJet Comm Lost
Red alarm.
Associated parameter 1.4540.996
Cause
CAN bus communication for gas
control valve faulty
(alternatively, a stepper motor
with gas mixer can be installed).
656 – AL ProActA Comm Lost
Red alarm.
Associated parameter 1.4550.096
Cause
CAN bus communication for
throttle A faulty.
122 | Troubleshooting | MS150114/01E 2015-03
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).
Corrective action
1. Check cabling.
2. Check power supply.
3. Carry out restart of ECU, EMU & gas control valve.
4. Check settings with device-specific dialog software (XD11).
Corrective action
1. Check cabling.
2. Check power supply.
3. Carry out restart of ECU, EMU & throttle A.
4. Check settings with device-specific dialog software (XD50.1).