MTU 12V4000G34F Operating Instructions Manual page 94

118 – LO ECU Power Supply Voltage
Cause
The supply voltage of the ECU has
undershot specified limit value 1.
119 – LOLO ECU Power Supply Voltage
Cause
The supply voltage of the ECU has
violated the specified limit value
2.
120 – HI ECU Power Supply Voltage
Cause
The supply voltage of the ECU has
violated the specified limit value
1.
321 – AL Wiring Cylinder A1
Cause
Short circuit fault in the injector
wiring for cylinder A1 or injector
faulty.
322 – AL Wiring Cylinder A2
Cause
Short circuit fault in the injector
wiring for cylinder A2 or injector
faulty.
323 – AL Wiring Cylinder A3
Cause
Short circuit fault in the injector
wiring for cylinder A3 or injector
faulty.
324 – AL Wiring Cylinder A4
Cause
Short circuit fault in the injector
wiring for cylinder A4 or injector
faulty.
94 | Troubleshooting | MS15060/01E 2018-12
Corrective action
1. Check state of charge of batteries (plant side).
2. Check plug connections to Engine Control Unit (→ Page 226).
3. Check battery charging-generator.
4. Contact Service.
Corrective action
1. Check state of charge of batteries (plant side).
2. Check plug connections to Engine Control Unit (→ Page 226).
3. Check battery charging-generator.
4. Contact Service.
Corrective action
1. Check state of charge of batteries (plant side).
2. Check plug connections to Engine Control Unit (→ Page 226).
3. Check battery charging-generator.
4. Contact Service.
Corrective action
1. Check wiring of affected injector (→ Page 219).
2. Replace injector (→ Page 134).
3. Contact Service.
Corrective action
1. Check wiring of affected injector (→ Page 219).
2. Replace injector (→ Page 134).
3. Contact Service.
Corrective action
1. Check wiring of affected injector (→ Page 219).
2. Replace injector (→ Page 134).
3. Contact Service.
Corrective action
1. Check wiring of affected injector (→ Page 219).
2. Replace injector (→ Page 134).
3. Contact Service.