MTU 20 V 4000 G23 Technical Publication page 84

Troubleshooting
Fault
code No. Designation
187 AL CAN1 Error Passive
188 AL CAN2 Bus Off
189
AL CAN2 Error Passive
190 AL EMU Parameter Not
Supported
201 SD T-Coolant
202
SD T-Fuel
203 SD T-Charge Air
M015715/00E 06-08
Meaning
Alarm configuration; CAN
controller 1 has signalled a
warning.
Alarm configuration; CAN
controller 2 is in "Bus-Off"
status. Automatic changeover
to CAN 1; Short circuit,
massive interference or Baud
rate incompatibility.
Alarm configuration; CAN
controller 2 has signalled a
warning.
Alarm configuration; EMU
parameter are not supported.
SD alarm configuration;
Coolant temperature sensor
faulty; short circuit or wire
break.
SD alarm configuration; Fuel
temperature sensor faulty;
short circuit or wire break.
SD alarm configuration;
Charge-air temperature sensor
faulty; short circuit or wire
break.
Task
1. Inspect CAN
bus for short
circuit and
rectify short
circuit as
necessary.
2. Check
shielding,
improve as
necessary.
3. Contact
Service.
1. Inspect CAN
bus for short
circuit and
rectify short
circuit as
necessary.
2. Check
shielding,
improve as
necessary.
3. Contact
Service.
1. Inspect CAN
bus for short
circuit and
rectify short
circuit as
necessary.
2. Check
shielding,
improve as
necessary.
3. Contact
Service.
Contact Service.
Check sensor and
cabling (B6), replace
as necessary.
Error cleared after
restarting the engine.
Check sensor and
cabling (B33),
replace as necessary.
Error cleared after
restarting the engine.
Check sensor and
cabling (B9), replace
as necessary.
Error cleared after
restarting the engine.
79
Related
parameter No.
2.0500.687
2.0500.688
2.0500.689
2.0500.690
1.8004.570
1.8004.572
1.8004.571
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