MTU 12 V 4000 Lx4 Operating Instructions Manual page 117

119 – LOLO ECU Power Supply Voltage
Red alarm.
Associated parameter 2.0140.922
Cause
Supply voltage too low (limit
value 2).
120 – HI ECU Power Supply Voltage
Yellow alarm.
Associated parameter 2.0140.931
Cause
Supply voltage too high (limit
value 1).
121 – HIHI ECU Power Supply Voltage
Red alarm.
Associated parameter 2.0140.932
Cause
Supply voltage too high (limit
value 2).
122 – HI T-ECU
Yellow alarm.
Associated parameter 2.0132.921
Cause
Electronics temperature too high
(limit value 1).
180 – AL CAN1 Node Lost
Yellow alarm.
Associated parameter 2.0500.680
Cause
Bus node (SAM or EMU) lost on
CAN bus 1.
181 – AL CAN2 Node Lost
Yellow alarm.
Associated parameter 2.0500.681
Cause
Bus node (SAM or EMU) lost on
CAN bus 2.
Corrective action
1. Check supply voltage.
2. Check cabling.
Corrective action
1. Check supply voltage.
2. Check cabling.
Corrective action
1. Check supply voltage.
2. Check cabling.
Corrective action
u Ensure better cooling of the ECU. Reduce room temperature,
check air flow to ADEC.
Corrective action
u Check operation of nodes and cabling. Busses (CAN bus 1 and
CAN bus 2) are redundant.
Corrective action
u Check operation of nodes and cabling. Busses (CAN bus 1 and
CAN bus 2) are redundant.
MS15027/00E 2013-10 | Troubleshooting | 117