Workshop Manual

12.14 Slow Response when Accelerating
Yes Remove the failure
displayed
1 Put the ignition switch to “ON”. Use a failure
diagnostic tester to check if any failure
information record exists.
No Next step
Yes Next step 2 Turn off the engine. Check the air cleaner and
look if it is open.
No Replace
Yes Next step 3 Run the engine at idle speed and check if the
engine revolution speed is normal at idle speed.
No Repair in accordance
with idle speed
failure item
Yes Next step 4 Run the engine at idle speed and check if the air
intake pressure is from 35 to 65 kPa.
No Overhaul
Yes Next step 5 Put the ignition switch to “ON”. Check if it is
break or short circuit between 38#, 32#, 54#,
36# pins on ECU connector and 1#, 2#, 4#, 6#
pins of throttle position sensor of electronic
throttle valve body.
No Repair or replace
Harness
Yes Next step 6 Let engine run at idle speed, after coolant
temperature reaches normal value, then use a
diagnostic tester to check if ignition advance
angle is normal.
No Check other part
Yes Next step 7 Connect fuel manometer valve. Short 30# and
87# pins of fuel pump relay to make the fuel
pump run, and then check if fuel pressure is
around 4000kPa.
No 11
Yes 10 8 Use a special joint to directly provide 12V
power supply and intermittent 12V power
supply from battery to injector and check if the
injector can work intermittently.
No Next step
Yes Next step 9 Clean out the fuel injector and look if it can
work correctly.
No Replace fuel injector
Yes Replace fuel 10 Check if fuel is bad or moisture.
No 16
Yes Next step 11 Check if the fuel pressure value is below 300
kPa.
No 15
Yes Next step 12 Close the fuel manometer valve. Re-engage the
ignition switch to let the fuel pump run for a
period of time, and then check if fuel pressure
can be built up.
No 14