Engine Electrical System

12) Too high idle speed (the memory has to be restored after ECU’s power-off)
Yes
Fix the indicated
malfunction.
1
Turn the ignition switch to “ON” position.
Inspect with the diagnostic tester to see
whether there is any malfunction
information record.
No Proceed to next step.
Yes Adjust or replace.
2
Verify that the fastener connected to the
accelerator pedal is jammed or too tight.
No Proceed to next step.
Yes Repair or replace.
3
Verify that the carbon canister control valve,
the fuel pressure regulator, the crankcase
forced ventilation vacuum pipe, the brake
system vacuum booster hose are assembled
well or damaged.
No Proceed to next step.
Yes Proceed to next step.
4
Run the engine at idle speed, shift at neutral
position, and step on the brake pedal in order
to verify that the idle speed is too high.
No Proceed to Step 6
Yes
Repair or replace the
vacuum booster. 5
Clamp the vacuum booster hose to verify
whether the idle speed is normal.
No Proceed to next step.
Yes
Replace the PVC
valve 6
Clamp the crankcase forced ventilation
vacuum pipe to verify whether the idle speed
is changed to normal.
No Proceed to next step.
Yes
Replace the carbon
canister control
valve.
7
Clamp the carbon canister control valve hose
to verify whether the idle speed is changed
to normal.
No Proceed to next step.
Yes Repair or replace.
8
Verify that the idle actuator is inflexible or
jammed.
No Proceed to next step.
Yes Repair or replace.
9
Verify that there is any leakage at other
places of air inlet pipe.
No Proceed to next step.
Yes Proceed to next step.
10
Verify that the seal ring of fuel injector is in
good condition.
No
Replace the seal
ring.
Yes Replace the ECU.
11
Verify that the absolute pressure sensor of
air intake manifold and air intake
temperature sensor are in proper conditions.
No Replace the sensor.
E-81
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