Mazda 323 Workshop Manual Supplement page 185

F2
CONTROL SYSTEM
93GOF2-79; 2
93GOF2-793
93GOFZ794
1
OXYGEN SENSOR [BP TURBO]
Inspection
Sensor
1. Warm up the engine to normal operating temperature.
2. Disconnect the oxygen sensor connector.
3. Connect a voltmeter to the oxygen sensor terminal @.
4. Run the engine at 4,500
rpm
untiI the voltmeter indicates
approx. 0.7V.
5. Increase and decrease the engine speed suddenly and
measure the vottage.
Voltage
Engme speed
Voltage (v-)
Decelerating
o-0.4
Accelerating
0.5-l .o
6. Connect the
SSTs
to the diagnosis connector.
7. Set the system selector select switch to 1 and the test switch
to 02
MONITOR.
8. Increase the engine speed to
between 2,000 and 3,000
rpm,
and verify that the monitor lamp flashes for 10 seconds.
Specification:
Monitor lamp flashes more than 8 times/IO sec.
Heater
1. Disconnect the oxygen sensor connector.
2. Check resistance between oxygen sensor connector ter-
minals @ and 0.
Resistance: Approx.-6& [at 20°C (68OF)]
Replacement
1. Disconnect the oxygen connector. '
2. Remove the oxygen sensor.
3. Install the new oxygen sensor and new washer.
4. Tighten the oxygen sensor to specified torque.
Tightening torque:
29-49 N-m (3-5 m-kg, 22-36 ft-tb)