Engine control system·- EFI system
Inspection
1. VVT control solenoid valve assembly (4G18-1006200)
(a) Resistance inspection
(1) Measure the resistance between terminals with ohmmeter
Resistance:
(b) Operation inspection
Connect battery positive (+) wire to No.1 terminal and negative (-) wire to No. 2 terminal, and check
valve operation.
Note: ensure that the valve is not stuck.
Hint: if there are foreign matters in the valve, the valve could not be closed tightly and will
thus result in slight pressure being lifted toward higher direction.
2. Throttle body components (4G18-1001240)
(a) Inspection of throttle body
(1) Throttle valve shaft should not swing.
(2) All channels should not be blocked.
(3) Throttle valve plate should rotate flexibly and act smoothly.
(4) When the throttle is at closed position, there should be no clearance between throttle stop bolts and
throttle lever.
Note: it is not allowed to adjust the throttle stop bolts.
3. Throttle position sensor (4G18-3600080)
(a) Resistance inspection
(1) Remove the wiring harness connectors of throttle posi-
tion sensor.
(2) Measure the resistance between 1
#
pin and 2
#
pin with
ohmmeter, resistance value: .
(3)Connect 2 terminals respectively to 1
#
pin and 3
#
pin,
and turn the throttle, the resistance value varies linearly
with the opening of throttle, but 2
#
pin
and 3
#
pin are
contrary to this.
Note: pay attention whether there is great jump with
resistance value when observing resistance change.
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