MID 128, SID 32, Wastegate output
driver
FMI 3 – Voltage above normal or shorted high
Fault code explanation: Faulty regulator / Faulty regulator circuit
Fault indication: DCU: Engine warning in DCU display.
CIU: None.
Flash code
Electrical fault: None.
Value fault: None.
Conditions for fault code: The voltage on pin B38 on the EMS2 deviates from normal voltage value.
Possible reason: • Short
circuited wastegate regulator signal cable to 5V voltage or to bat-
tery voltage.
•
Faulty wastegate regulator.
Suitable action: 1 Check all cable and connectors between EMS2 and wastegate regu-
lator.
2 Change wastegate regulator.
FMI 4 – Voltage below normal or shorted to lower voltage
Fault code explanation: Faulty regulator / Faulty regulator circuit
Fault indication: DCU: Engine warning in DCU display.
CIU: None.
Flash code
Electrical fault: None.
Value fault: None.
Conditions for fault code: The voltage on pin B38 on the EMS2 deviates from normal voltage value.
Possible reason: • Open circuit in wastegate battery voltage supply cable.
•
Short circuited wastegate regulator signal cable to battery negative or
to lower voltage.
•
Faulty wastegate regulator.
Suitable action: 1 Check all cable and connectors between EMS2 and wastegate regu-
lator.
2 Change wastegate regulator.
30-2 Fault Tracing
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