Chapter 6 Emissions control systems 6-29
16.20 insert feeler gauges with a combined thickness of 0.0256
in between the fixed SAS and the throttle lever (3.OL models)
16.21
The TPS is located on the side of the throttle body - it’s
secured by two screws
Motor position
EfEfil
16.32 To check the idle position switch on 2.4L models,
check the continuity between terminal 4 of the electrical
connector and ground-with the accelerator pedal pressed
down, there should be no continuity; with the pedal
released, there should be continuity
16.36 To check the idle position switch on 3.OL models, check
the continuity between terminal 1 (sensor ground) and terminal
2 (idle position switch) of the electrical connector for the
throttle position sensor
Chapter’s Specifications. If the indicated resistance is outside this specifi-
cation, replace the throttle position sensor.
9 Using an analog ohmmeter hooked up to terminals 2 and 4 (2.4L en-
gine)orterminals 1 and3 (3.OLengine), slowlyopenthethrottlevalvefrom
its idle position all th&vay to the fully open position and verify that the re-
sistance rises smoothly in proportion to the throttle valve opening angle.
10 If the indicated resistance doesn’t fall within the specified values or
operate as described above, replace the throttle position sensor.
11 Loosen the accelerator cable (see Chapter 4).
12 If you’re adjusting the TPS on a 3,OL engine, proceed to Step 18. If
‘you’re adjusting the TPS on a 2.4L engine, follow Steps 13 through 17.
13 Plug in the electrical connector.
14 Connect a digital voltmeter between terminals 19 (TPS output volt-
age) and 24 (ground) of the engine control unit (see
illustration).
Turn the
ignition switch to On - don’t start the engine -and verify that the output
voltage from the throttle position sensor is within the range listed in this
Chapter’s Specifications.
15 If the throttle position sensor is out of specification, adjust it by loosen-
ing the mounting screws
(see illustration)
and rotating the sensor. Clock-
wise rotation increases the output voltage; counterclockwise decreases it.
16 After adjustment, tighten the screws securely.
17 Adjust the accelerator cable (see Chapter 4).
18 On 3.OL engines, unplug the electrical connector for the throttle posi-
tion sensor.
19 Hookup an ohmmeter between terminals 1 and 2 with apairofjumper
wires
(see illustration).
20 Insert feeler gauges with atotal combined thickness of 0.0256 in be-
tween the fixed SAS and the throttle lever
(see illustration).
21 Loosen the throttle position sensor mounting screws
(see iiiustra-
tion). 22
Turn the sensor clockwise as far as it will go, then checkthe continuity be-
tween terminals 1 and 2.
23 Slowly turn the throttle position sensor in the counterclockwise direc-
tion to the point at which there’s no longer any continuity. Tighten the sen-
sor mounting screws securely at this point.
24 Plug in the electrical connector for the throttle position sensor.
25 Hookupavoltmeter between terminal 19 (throttle position sensorout-
put voltage) and terminal 24 (ground) of the engine control unit(see
illus-
tration 16.14).
26 Turn the ignition switch to On (but don’t start the engine), check the
output voltage of the throttle position sensor and compare,your reading to
the standard value listed in this Chapter’s Specifications.
27 If the indicated resistance is outside the specified value, check the
throttle position sensor and the wiring harness.
28
Remove the feeler gauge.
29 Turn the ignition switch to Off.
30 Adjust the tension of the accelerator cable (see Chapter 4).
Idle position switch
2.4L engine
Refer to illustration 16.32
31 Unplug the electrical connector from the idle position switch.
32 Check the continuity between terminal 4 and ground
(see iilustra-
tion).
With the accelerator pedal pressed down, there shouldn’t be any
continuity (infinite resistance); with the pedal released, there should be
continuity (zero resistance). If the idle position switch fails either test, re-
place it.
33 Plug in the connector.
3.OL engine
Refer to illustration 16.36
34 With the accelerator pedal released, verify that the throttle valve lever
or the fixed SAS is pushed. If it isn’t, adjust the fixed SAS (see Section 26
in Chapter 4).
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