Mazda MX-6 1998, Workshop Manual

Page: 560 / 1282

CONTROL SYSTEM [KL]
BATTERY
W6U140WNM
(2) Select the “PID/DATA MONITOR AND
RECORD” function on the NGS tester display
and press TRIGGER.
(3) Select “02S11” , “02S21", “0 2S 12” and
“0 2 S 1 3 ” on the NGS tester display and press
START. The NGS tester measures and shows
the voltage.
Specification
Engine
condition
Voltage (V)
02S11 02S21 02S12 02S13
I G - O N
Below 1.0
A f t e r w a r m u p
0.1—0.9
E n g in e c o ld
Below 0.5 Below 0.5 Below 0.5 Approx. 0
D e c e le r a tio n 0 - 0 . 5 0 - 0 . 5 0 - 0 . 5 —
A c c e le r a tio n
0 .5 - 1 .0
0 .5 - 1 .0 0 .5 - 1 .0 —
(4) If not as specified, inspect the following.
• Intake-air system
• Fuel system
• On-board diagnostic system
(5) If these systems are okay, replace the heated
oxygen sensor. (Refer to 01-15 EXHAUST
SYSTEM REMOVAL/INSTALLATION.)
Heated Oxygen Sensor Heater Inspection
1. Disconnect the heated oxygen sensor connector.
2. Measure the resistance between heated oxygen
sensor terminals C and D by using an ohmmeter.
COMPONENT SIDE CONNECTOR
(VIEW FROM TERMINAL SIDE)
MIDDLE. FRONT (RH)
C
_ C A
3
D 8
Specification
Approx. 6 Q
3. If not as specified, replace the heated oxygen
sensor. (Refer to 01-15 EXHAUST SYSTEM
REMOVAL/INSTALLATION [KL].)
COMPONENT SIDE CONNECTOR
(VIEW FROM TERMINAL SIDE)
FRONT (Lh). REAR
EGR B O O ST SENSOR IN SPEC TIO N [KL]
Note
• The following vacuum values are indicated by
relative pressure from atmospheric pressure.
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 0 R
Caution
•
Do not apply a vacuum outside of the
specified lim its. Doing so will dam age 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 M T
3. Tighten the connector bolt.
Tightening torque
7.9— 10.7
N-m
{80— 100 kgf cm , 69.5— 95.4 in lbf}
Note
• The output voltage varies with the measuring
condition.
4 9 U N 0 1 130
PCM
0 1 -4 0 B -2 5