Engine Electrical System

14) Slow respond during acceleration
Yes
Fix the indicated
malfunction
1
Turn the ignition switch to “ON” position.
Verify with diagnostic tester to see
whether there is any malfunction
information record.
No Proceed to next step.
Yes Proceed to next step.
2
Shut down the engine and verify that the
air filter is free of any blockage.
No Replace
Yes Proceed to next step.
3
Run the engine at idle speed in order to
verify that the idle speed is normal.
No
Overhaul according to
the idle speed
malfunction instruction
Yes Proceed to next step.
4
Verify that the air inlet pipe pressure is
being maintained between 35-65 kPa at
idle speed.
No Overhaul
Yes Proceed to next step.
5
Turn the ignition switch to “ON” position
and connect the adaptor between ECU and
the wiring harness. Verify that the
voltages at following pins of ECU
including signal output terminal and
grounding terminal of throttle position
sensor, and pins of 32# and 33# (used as
sensor power supply of 4.5-5V) are
normal.
No
Repair or replace the
wiring harness
Yes Proceed to next step.
6
Operate the engine at idle speed and wait
until the coolant temperature has reached
its normal value in order to verify that the
ignition advance angle is normal.
No Inspect other items
Yes Proceed to next step.
7
Connect the fuel manometer valve. Short
the 30# and 87# pins of the fuel pump
relay to operate the fuel pump in order to
verify that the fuel pressure is maintained
at about 350kPa.
No Proceed to Step 11.
Yes Proceed to Step 10.
8
Apply a voltage supply of 12V directly
between the battery and the fuel injector
with special connector and verify that the
fuel injector functions normally.
No Proceed to next step.
Yes Proceed to next step.
9
After washing and cleaning the fuel
injector, verify again to see whether it can
function normally.
No
Replace the fuel
injector.
Yes Replace the fuel.
10
Verify that the fuel is deteriorated or
contaminated with water.
No Proceed to Step 16.
Yes Proceed to next step.
11
Verify that the fuel pressure is lower than
350kPa.
No Proceed to Step 15.
E-84
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