The engine-ECU controls the fuel discharge rate using
the suction control valve.
The engine-ECU monitors changes in the fuel discharge rate at each injection to
detect a fault in one of the two plungers in the supply pump.
Vehicle in steady and stable state (the difference from the last data of the objective
common rail pressure is less than 3 MPa and that from the last data of the final fuel injection
rate is less than 2 mm3/st.
The inter-cylinder difference in pressure feed exceeds the predetermined value 500
Air penetration due to lack of fuel
Failed supply pump
STEP 1. M.U.T.-III diagnosis code
With the air released from the fuel line, supply fuel if necessary.
Continue idle operation for about 5 minutes.
Is diagnosis code P1273 set again?
STEP 2. Replace the supply pump assembly.
After learning the supply pump assembly, re-check the trouble symptoms.