Engine Electrical System

No Replace the fuel pump
Yes
Repair or replace the
fuel return pipe
13
Verify that the fuel return pipe has any
leakage or bending.
No
Replace the fuel
pressure regulator
Yes Proceed to next step.
14
Disconnect the connector of idle speed
actuator before the temperature of
engine coolant reaches 35
0
C in order to
observe whether the engine speed is
decreasing.
No
Repair or replace the
idle speed actuator
Yes Proceed to next step.
15
Turn the ignition switch to “ON”
position. verify that the voltages at
following ECU pins are normal: 13# is
at about 12V of battery voltage; 80# and
61# are at zero.
No
Inspect the wiring
harness and plug in
connector
Yes Proceed to next step.
16
Run the engine at idle speed; until the
coolant temperature reaches normal
value, then verify that the ignition
advance angle is normal.
No
Adjust the ignition
advance angle
Yes Proceed to next step.
17
Verify that the compression pressure of
engine cylinder is normal.
No Fix the malfunction
Yes Repair or replace
18
Verify that the absolute pressure and
temperature sensor of air intake
manifold has any blockage.
No Proceed to next step.
Yes Replace the ECU.
19
Verify that the coolant temperature
sensor is normal.
No Repair or replace
E-69
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