Table 1-58 (Continued)
S/N Operation Test Results Actions
Yes Next step
4
Check if the intake air manifold pressure is between
35kPa and 65kPa under idle speed.
No
Remove leakage for the air
intake system
Yes Next step
5
Connect the fuel pressure gauge valve. Short-circuit the
pin 30 and the pin 87 of the fuel bump relay, and run the
fuel pump. Check if the fuel pressure is about 300kPa.
No 9
Yes 8
6
Connect the battery and the fuel injector with a special
connector. With the voltage supply of 12V, check the fuel
injector for normal operation.
No Next step
Yes Replace
7
Clean the fuel injector and check the fuel injector for
normal operation.
No Replace fuel injector
Yes Replace fuel
8 Check if the fuel is wrong or contains water.
No 14
Yes Next step
9 Check if the fuel pressure is lower than 250kPa.
No 13
Yes Next step
10
Close the fuel gauge valve. Turn on the ignition switch
again and keep the fuel pump working for 3 seconds.
Check if fuel pressure can be produced.
No 12
Yes
Replace fuel pressure
regulator
11
Turn on the fuel gauge valve, and block the fuel return
pipe. Check if the fuel pressure is quickly produced.
No
Repair or replace fuel
injector or fuel pipe
Yes
Repair or replace fuel intake
pipe
12 Check the fuel intake pipe for leakage or blockage.
No Replace fuel pump
Yes
Repair or replace fuel return
pipe
13 Check if the fuel return pipe is blocked or bent.
No
Replace fuel pressure
regulator
Yes
Replace coolant temperature
sensor
15
Take out the coolant temperature sensor, and check the
engine for normal operation.
No Next step
Yes Next step
16 Check the compressed pressure.
No Remove the trouble
Yes Next step
17
Check the resistance of the high voltage wire for each
cylinder. Is the resistance OK?
No Replace
Yes Replace
18 Check the ignition coil for damage or crack.
No Next step
Yes Replace ECU
19 Check the spark plug for normal operation.
No Replace spark plug
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