MID 128, PPID 332 Thermostat
FMI 3 – Voltage above normal or shorted high
Fault code explanation: Faulty sensor / Faulty 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 B34 on the EMS2 deviates from normal voltage value.
Possible reason: • Short circuited coldstart valve signal cable to 5V voltage or to battery
voltage.
•
Faulty coldstart valve.
Suitable action: 1
Check all cable and connectors between EMS2 and coldstart valve.
2 Check coldstart valve.
FMI 4 – Voltage below normal or shorted to lower voltage
Fault code explanation: Faulty sensor / Faulty 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 B34 on the EMS2 deviates from normal voltage value.
Possible reason: • Short circuited coldstart valve signal cable to battery negative or to
lower voltage.
•
Faulty coldstart valve.
Suitable action: 1
Check all cable and connectors between EMS2 and coldstart valve.
2 Check coldstart valve.
FMI 5 – Current below normal or open circuit
Fault code explanation: Faulty sensor / Faulty 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 B34 on the EMS2 deviates from normal voltage value.
Possible reason: • Open circuit in coldstart valve signal cable.
•
Open circuit in coldstart valve battery voltage cable.
•
Faulty coldstart valve.
Suitable action: 1 Check all cable and connectors between EMS2 and coldstart valve.
2 Check contact pressure in socket 34 engine connector B.
3
Check coldstart valve.
30-2 Fault Tracing
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