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655 – AL TecJet Comm Lost
Red alarm.
Associated parameter 1.4540.996
Cause
Corrective action
CAN bus communication to gas
control valve faulty (alternatively
a stepper motor with gas mixer
can be installed).
1. Check cabling.
2. Check power supply.
3. Restart ECU, EMU & gas control valve.
4. Check settings using device-specific dialog software (XD11).
656 – AL ProActA Comm Lost
Red alarm.
Associated parameter 1.4550.096
Cause
Corrective action
CAN bus communication to
throttle A faulty.
1. Check cabling.
2. Check power supply.
3. Restart ECU, EMU & throttle A.
4. Check settings using device-specific dialog software (XD50.1).
657 – AL ProActB Comm Lost
Red alarm.
Associated parameter 1.4550.196
Cause
Corrective action
CAN bus communication to
throttle B faulty.
1. Check cabling.
2. Check power supply.
3. Restart ECU, EMU & throttle B.
4. Check settings using device-specific dialog software (XD50.2).
658 – AL NOxA Comm Lost
Yellow alarm.
Associated parameter 1.4560.096
Cause
Corrective action
CAN bus communication to NOx
sensor A faulty.
1. Check cabling.
2. Check power supply.
3. Restart ECU, EMU.
4. Replace sensor.
659 – AL NOxB Comm Lost
Yellow alarm.
Associated parameter 1.4560.196
Cause
Corrective action
CAN bus communication to NOx
sensor B faulty.
1. Check cabling.
2. Check power supply.
3. Restart ECU, EMU.
4. Replace sensor.
140 | Troubleshooting | MS15027/02E 2015-04
TIM-ID: 0000044567 - 003