Mazda MX-6 1998, Workshop Manual

Page: 556 / 1282

CONTROL SYSTEM [KL]
TH R O TTLE PO SITIO N SENSO R A D JU STM EN T [KL]
Caution
•
The throttle position sensor is adjusted at
the factory before shipm ent. Unnecessary
adjustm ent will negatively effect the
engine perform ance.
• A djusting the throttle position sensor by
using the throttle adjusting screw (TAS)
will negatively effect the engine
perform ance.
1. Verify that the throttle valve is at the closed
throttle position.
2. Disconnect the throttle position sensor connector.
3. Turn the ignition switch to ON.
4. Measure the voltage at harness side connector
terminal B by using an ohmmeter and record it.
A B
A
W 6 U 1 4 0 W 0 M
(1) Remove the PCM. (Refer to 01-40B
POWERTRAIN CONTROL MODULE (PCM)
REMOVAL/INSTALLATION [KL].)
(2) Connect the SST (104 Pin Breakout Box) to
the PCM as shown.
W 6 U 1 4 0 W N F
(3) Tighten the connector bolt.
Tightening torque
7.9— 10.7 N m
{80— 100 k g fc m , 69.5— 95.4 in-lbf}
(4) Verify that the throttle valve is at the closed
throttle position.
(5) Turn the ignition switch to ON.
(6) Rotate the throttle link by hand and adjust the
PCM terminal 89 voltage to specification.
Specification (At closed throttle position)
Throttle position sensor
harness side connector
terminal B voltage (V)
PCM terminal 89
voltage (V)
4.5— 4.9 0.4— 0.5
4.9— 5.1 0.4— 0.6
5.1— 5.5 0.5— 0.6
W 6 U 1 4 0 W M H
Specification
4.5— 5.5 V
5. Turn the ignition switch to OFF.
6. Connect the throttle position sensor connector.
7. Loosen the attaching screws.
8. If the SST (104 Pin Breakout Box) are used,
check in the following order.
(7) Tighten the attaching screws.
Specification
1.6— 2.3 N-m {16— 24 k g fm , 14— 20 in-lbf}
(8) When the throttle valve is at the wide open
throttle, verify that the PCM terminal 89
voltage is in the specification.
Specification (At wide open throttle)
Throttle position sensor
harness side connector
terminal B voltage (V)
PCM terminal 89
voltage (V)
4.5— 4.7
3.5— 4.4
4.7— 4.8
3.6— 4.5
4.8—4.9
3.7—4.6
4.9— 5.0
3.7— 4.8
5.0—5.1
3.8— 4.9
5.1— 5.3 4.0— 5.0
5.3— 5.4
4.1— 5.1
5.4— 5.5
4.2— 5.2
0 1 -4 0 B -2 1