Engine Electrical System

Yes Replace the fuel
12
Verify that the fuel is deteriorated or
contaminated by water.
No Proceed to Step 18.
Yes Proceed to next step.
13
Verify that the fuel pressure is lower than
350kPa.
No Proceed to Step 17.
Yes Proceed to next step.
14
Close the fuel manometer valve. Connect the
ignition switch again to re-operate the fuel
pump in order to verify that the fuel pressure
can be established.
No Proceed to Step 16.
Yes
Replace fuel and
pressure regulator
15
Open the fuel manometer valve and clamp
the fuel return pipe with the fuel tube clamp
to stop the fuel return in order to verify that
the fuel pressure can be established quickly.
No
Repair or replace the
fuel injector or fuel
pipe
Yes
Repair or replace the
fuel inlet pipe 16
Verify that the fuel inlet pipe has any
leakage or blockage.
No Replace the fuel pump
Yes
Repair or replace the
fuel return pipe
17
Verify that the fuel return pipe has any
leakage or bending.
No
Replace the fuel
pressure regulator
Yes Proceed to next step.
18
Connect an adapter between ECU and the
wiring harness. Then verify that there is any
voltage at the ECU’s pin No.44, 45, 63, 12
and 13, and to see whether the positive
power supply wires connected to the above
ECU’s pins and the ground wires connected
to the pin No. 3, 51, 53, 61 and 80 are
normal.
No
Repair or replace the
wiring harness.
Yes Repair
19
Verify that the parts of air intake system
have any air leakage.
No Proceed to next step.
Yes Repair or replace
20
Verify that the absolute pressure and
temperature sensor of air intake manifold has
any blockage.
No Proceed to next step.
Yes Proceed to next step.
21
Verify that the coolant temperature sensor is
normal.
No Repair or replace
Yes
Fix the mechanical
malfunction
22
Verify that the unsuccessful startup is due to
mechanical reasons such as excessive
clearance between the piston and cylinder or
due to cylinder air leakage, etc.
No Replace the ECU
E-65
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