MID 128, PID 111 Coolant level
FMI 1 – Data valid but above normal operational range
Fault code explanation: Coolant level is too low.
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 2.3
Value fault: 2.2
Symptom: Engine is derated if the engine protection parameter is activated.
Suitable action: 1 Check the coolant level.
2
Bleed the coolant water system.
3
If low coolant level check the coolant water system for leakage by a
pressure test.
4 Check the pressure valve in the coolant cup.
5 Check the wiring to the coolant level switch.
6 Check the coolant level switch.
FMI 3– Voltage above normal or shorted high
Fault code explanation: Faulty switch / Faulty switch circuit
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 2.3
Value fault: 2.2
Conditions for fault code: The voltage on pin B23 in the engine control unit is too high.
Possible reason: Short circuit to battery voltage on pin B23.
Suitable action: 1 Check the cable harness between the coolant level switch and the
EMS2.
P0004033
30-2 Fault Tracing
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