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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.
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).
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 (→ Page 202).
2. Check power supply.
3. Carry out restart of ECU, EMU and knock control.
4. Check settings with device-specific dialog software (XD10).
Corrective action
1. Check cabling (→ Page 202).
2. Check power supply.
3. Restart ECU, EMU and ignition system.
4. Check settings with device-specific dialog software.
Corrective action
1. Check cabling (→ Page 202).
2. Check power supply.
3. Carry out restart of ECU, EMU and bypass flap.
4. Check settings with device-specific dialog software (XD50.3).
Corrective action
1. Check cabling (→ Page 202).
2. Check power supply.
3. Carry out restart of ECU, EMU and gas control valve.
4. Check settings with device-specific dialog software (XD11).
MS150121/02E 2017-09 | Troubleshooting | 153
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