MID 128, PID 106 Air inlet pressure
FMI 0 – Data valid but above normal operational range
Fault code explanation: Air inlet pressure is too high.
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 3.4
Value fault: 3.5
Symptom: Power is reduced due to error torque map if the engine protection parameter
is activated.
Conditions for fault code: Air inlet pressure exceeds the set value of the engine protection parameter.
Possible reason: • The wastegate does not function properly.
•
Faulty air inlet pressure sensor.
•
Wrong turbo compressor unit according to the engine specification.
Suitable action: 1 Check the wastegate functionality. (see workshop manual Group
21-26)
2 Check the air inlet pressure sensor by control measuring the air inlet
pressure using a measuring tap (see workshop manual Group 21-26)
3 Check that the turbo compressor unit is in according the engine speci-
fication.
FMI 3 – Voltage above normal or shorted high
Fault code explanation: Faulty sensor / Faulty sensor circuit
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 3.4
Value fault: 3.5
Symptom: Engine smokes more than normally during acceleration or load increase.
Conditions for fault code: The voltage on pin A22 on the EMS2 is more than 4,77 Volt.
Possible reason: • Open circuit in the sensors negative cable.
•
Short circuited sensor signal cable to 5V voltage or battery voltage.
•
Faulty sensor.
Suitable action: 1 Check the cable harness between the air inlet pressure sensor and
EMS2.
2 Check the contact pressure in socket 11 in engine connector A.
3 Check the sensor.
30-2 Fault Tracing
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