The engine-ECU estimates that the fuel filter is freezing, using the input signal from the each sensor.
When setting this diagnosis code, the engine-ECU blinks the glow lamp.
TROUBLE JUDGEMENT
Check Conditions
During steady driving
Fuel temperature is lower than specified temperature
Engine coolant temperature is lower than specified temperature
Judgement Criteria
Determination of clogged fuel filter
Fuel pressure hunting occurs more than certain degree, or difference more than certain degree exists between target fuel pressure and actual fuel pressure
FAIL-SAFE AND BACKUP FUNCTION
The rail pressure is controlled by more than 50 MPa.
The accelerator pedal opening is controlled to be 0 %.
PROBABLE CAUSE
Fuel filter Freezing
DIAGNOSIS PROCEDURE
STEP 1. Reconfirmation of M.U.T.-III diagnosis code after warming up the engine