Mazda MX-6 1998, Workshop Manual

Page: 528 / 1282

CONTROL SYSTEM [FS]
Heated Oxygen Sensor Heater Inspection
1. Disconnect the heated oxygen sensor connector.
2. Measure the resistance between heated oxygen
sensor terminals C and D for 4-pln connector or B
and C for 3-pin connector by using an ohmmeter.
FRONT (EXCEPT CALIFORNIA)
REAR
COMPONENT SIDE CONNECTOR
(VIEW FROM TERMINALS SIDE)
W 6 U 1 4 0 W C 0
FRONT (FOR CALIFORNIA)
ÍB)
(Â )
W
COMPONENT SIDE CONNECTOR
(VIEW FROM TERMINAL SIDE)
W 6 U 1 4 0 W C 1
Specification
Approx. 6 Q
3. If not as specified, replace the heated oxygen
sensor. (Refer to 01-15 EXHAUST SYSTEM
REMOVAL/INSTALLATION [FS].)
EGR BOOST SENSOR INSPECTION [FS]
Note
• The following vacuum values are indicated by
relative pressure from atmospheric pressure.
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.
W 6 U 1 4 0 W 1 5
W 6 U 1 4 0 W A Q
3. Tighten the connector bolt.
Tightening torque
7.9— 10.7 N m
{80— 100 kgf-cm, 69.5— 95.4 in-lbf}
Caution
• Do not apply a vacuum outside of the
specified limits. Doing so will damage the
EGR boost sensor.
4. Turn the ignition switch to ON.
5. Apply vacuum to the EGR boost sensor according
to the following procedure.
EGR BOOST SENSOR
W 6 U 1 4 0 W A R
Note
• The output voltage varies with the measuring
condition.
6. Increase the applied vacuum from 0 kPa (0
mmHg, 0 inHg} to -8 1 .3 kPa (-610 mmHg, -2 4 .0
inHg} and verify that the PCM terminal 89 voltage
decreases accordingly as specified.
Specification
A p p lie d vacuum
O u tp u t v o lta g e (V)*
0 kPa (0 mmHg, 0 inHg}
3.600— 4.400
-5 4 .7 kPa
(-4 1 0 m m H g ,-16.1 inHg}
1.658— 2.026
-8 1 .3 kPa
(-6 1 0 mmHg, -2 4 .0 inHg}
0.711— 0.867
• : Measuring condition is following.
• Input voltage: 5.0 V
• Atmospheric pressure: 101.3 kPa (760 mmHg, 29.9 inHg}
(Absolute pressure)
• Atmospheric temperature: 25 "C (77 °F}
0 1 -4 0 A -2 3