Mazda MX-6 1998, Workshop Manual

Page: 525 / 1282

CONTROL SYSTEM [FS]
Specification (At wide open throttle)
Throttle position sensor
harness side connector
terminal A voltage (V)
“TP V” 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
(8) If not as specified, check related wiring
harness. If they are okay, replace the throttle
body.
ENGINE COOLANT TEMPERATURE SENSOR INSPECTION [FS]
Inspection of Output Voltage
1. If the SST (104 Pin Breakout Box) are used,
check in the following order.
(1) Remove the PCM. (Refer to 01-40A
POWERTRAIN CONTROL MODULE (PCM)
REMOVAL/INSTALLATION [FS].)
(2) Connect the SST (104 Pin Breakout Box) to
the PCM as shown.
(3) Tighten the connector bolt.
Tightening torque
7.9— 10.7 N m
{80— 100 kgf cm, 69.5—95.4 in lbf}
(4) Turn the ignition switch to ON.
(5) Measure the voltage at PCM terminal 38.
Specification
Engine coolant
temperature condition
PCM terminal 38
voltage (V)
20 "C (68 °F) Approx. 3.1
After warm up
Below 1.0
(6) If not as specified, check the related harness
and engine coolant temperature sensor
resistance.
2. If the SSTs (NGS tester) are used, check in the
following order.
(1) Connect the
SSTs (NGS tester) to the data
link connector.
W 6 U 1 4 0 W 1 2
(2) Turn the ignition switch to ON.
(3) Select the “PID/DATA MONITOR AND
RECORD” function on the NGS tester display
and press TRIGGER.
(4) Select “ECT V” on the NGS tester display and
press START. The NGS tester measures and
shows the voltage.
Specification
Engine coolant
temperature condition
“ECT V ” voltage (V)
20 °C (68 “F} Approx. 3.1
After warm up Below 1.0
(5) If not as specified, check the related harness
and engine coolant temperature sensor
resistance.
Inspection of Resistance
1. Remove the engine coolant temperature sensor.
2. Place the engine coolant temperature sensor in
water with a thermometer, and heat the water
gradually.
3. Measure the resistance of the sensor by using an
ohmmeter.
0 1 -4 0 A -2 0