MTU 20V4000L32FNER Operating Instructions Manual page 130

118 – LO ECU Supply Voltage
Yellow alarm.
Associated parameter 2.0140.921
Cause
Supply voltage too low (limit value
1).
119 – LOLO ECU Supply Voltage
Red alarm.
Associated parameter 2.0140.922
Cause
Supply voltage too low (limit value
2).
120 – HI ECU Supply Voltage
Yellow alarm.
Associated parameter 2.0140.931
Cause
Supply voltage too high (limit
value 1).
121 – HIHI ECU 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
Temperature of electronics too
high (limit value 1).
180 – AL CAN1 Node Lost
Red alarm. Engine shutdown.
Associated parameter 2.0500.680
Cause
Bus node (EMU) lost on CAN bus
1.
130 | Troubleshooting | MS150122/02E 2017-09
Corrective action
1. Check supply voltage.
2. Check cabling (→ Page 203).
Corrective action
1. Check supply voltage.
2. Check cabling (→ Page 203).
Corrective action
1. Check supply voltage.
2. Check cabling (→ Page 203).
Corrective action
1. Check supply voltage.
2. Check cabling (→ Page 203).
Corrective action
1. Provide improved cooling for ECU. Reduce room temperature,
check air flow to ECU.
2. Compare device temperature with temperature gauge in DiaSys®.
Corrective action
u Check operation of bus users and cabling. Buses (CAN bus 1 and
CAN bus 2) are redundant.