MID 128, PID 172 Inlet air
temperature
FMI 4 – Voltage below normal or shorted to lower voltage
Fault code explanation: Faulty sensor / Faulty sensor circuit
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 7.9
Value fault: None.
Symptom: None.
Conditions for fault code: The voltage on pin B18 on the EMS 2 is less than 0.07 Volt.
Possible reason: • Short circuit between both cables to the air filter temperature sensor.
•
Faulty sensor.
Suitable action: 1
Check the cable harness between air filter temperature sensor and
EMS2.
2 Check the sensor.
FMI 5 – Current below normal or open circuit
Fault code explanation: Faulty sensor / Faulty sensor circuit
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 7.9
Value fault: None.
Symptom: None.
Conditions for fault code: The voltage on pin B31 on the EMS2 is more than 4,95 Volt.
Possible reason: • Open circuit in signal cable to the air filter temperature
•
Open circuit in negative cable to the air filter temperature sensor.
•
Faulty sensor.
Suitable action: 1 Check the cable harness between air filter temperature sensor and
EMS2.
2 Check the contact pressure in socket 18 and 31 in the engine connector
B.
3 Check the sensor.
30-2 Fault Tracing
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