Table 1-52 (Continued)
S/N Operation Test Results Actions
Yes Replace or repair fuel intake
pipe
15 Check the fuel intake pipe for leakage or blockage.
No Replace fuel pump
Yes Repair or replace fuel return
pipe
16 Check if the fuel return pipe is blocked or bent.
No Replace fuel pressure
regulator
Yes Next step
17
Connect an adapter between the ECU and the
harness. Check the pin J1-73 of the ECU for voltage.
Check the positive power supply line of the
above-mentioned ECU pin and the groud wire of the
pin J1-01, J1-17, J1-18 connected to the ECU for
normal operation.
No Repair or replace harness
Yes Repair
18
Check the parts and components of the intake system
for leakage.
No Next step
Yes Repair or replace
19
Check if the intake manifold absolute pressure and
temperature sensor is blocked.
No Next step
Yes Next step
20
Check if the coolant temperature sensor for normal
operation.
No Repair or replace
Yes Remove mechanical trouble
21
Check if the gap between the piston and the cylinder
is too wide. Check the cylinder for leakage.
No Replace ECU
3. Hard to start after warm-up
Table 1-53
S/N Operation Test Results Actions
Yes Remove the trouble
1
Turn the ignition switch to ON. Check if there is
trouble information records with a diagnostic
instrument.
No Next step
Yes Next step
2
Connect the fuel pressure gauge valve (the
connection point is related to the vehicle model).
Short-circuit the pin J1-47 and the pin J1-73 of the fuel
bump relay, and run the fuel pump. Check if the fuel
pressure is about 300kPa.
No 9
Yes Next step
3
Disconnect the fuel pipe, and turn the ignition switch.
Check if the pressure of the fuel system still keeps
between 150kPa and 200kPa after 1 hour.
No Repair fuel system leakage
Yes
Replace fuel pressure
regulator (inbuilt)
4
Connect the fuel pipe. Block the fuel return pipe, and
turn off the fuel pressure gauge valve. Turn off the
ignition switch. Check if the pressure of the fuel
system still keeps between 150kPa and 200kPa after
1 hour.
No Next step
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