MID 128, PPID 8 Piston Cooling Oil
Pressure
FMI 1 – Data valid but below operational range
Fault code explanation: Piston cooling oil pressure is too low.
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 6.8
Value fault: 6.7
Symptom: Engine is derated. The fault code is deactivated at engine speed below 1000
rpm.
Conditions for fault code: Piston cooling pressure is too low.
Suitable action: 1 Re-check the piston cooling pressure. If measurement shows that the
piston cooling pressure is correct, change the piston cooling pressure
switch.
FMI 3 – Voltage above normal or shorted high
Fault code explanation: Faulty sensor / Fault in sensor circuit
Fault indication: DCU: Engine warning in DCU display.
CIU: Flash code
Flash code
Electrical fault: 6.8
Value fault: 6.7
Conditions for fault code: The voltage on pin B14 in the engine control unit exceeds normal voltage
value.
Possible reason: Short circuited piston cooling signal cable to battery voltage.
Suitable action: 1 Check cable harness between EMS2 and the piston cooling switch.
30-2 Fault Tracing
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