655 – AL TecJet Comm Lost
Red alarm.
Associated parameter 1.4540.996
Cause
Corrective action
CAN bus communication for gas
control valve faulty
(alternatively, a stepper motor
with gas mixer can be installed).
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).
656 – AL ProActA Comm Lost
Red alarm.
Associated parameter 1.4550.096
Cause
Corrective action
CAN bus communication for
throttle A faulty.
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).
657 – AL ProActB Comm Lost
Red alarm.
Associated parameter 1.4550.196
Cause
Corrective action
CAN bus communication for
throttle B faulty.
1. Check cabling.
2. Check power supply.
3. Carry out restart of ECU, EMU & throttle B.
4. Check settings with device-specific dialog software (XD50.2).
658 – AL NOxA Comm Lost
Red alarm.
Associated parameter 1.4560.096
Cause
Corrective action
CAN bus communication for
NOx sensor A faulty.
1. Check cabling.
2. Check power supply.
3. Carry out restart of ECU and EMU.
4. Replace sensor.
659 – AL NOxB Comm Lost
Red alarm.
Associated parameter 1.4560.196
Cause
Corrective action
CAN bus communication for
NOx sensor B faulty.
1. Check cabling.
2. Check power supply.
3. Carry out restart of ECU and EMU.
4. Replace sensor.
MS150121/00E 2015-07
| Troubleshooting | 127
TIM-ID: 0000038612 - 001