Manual Trans.
INSPECTION OF TERMINAL VOLTAGE1. Warm up the engine to normal operating temperature and let it idle.
2. Disconnect the heated oxygen sensor connector.
3. Connect a voltmeter between the heated oxygen sensor terminal A and a ground.
4. Run the engine at 3,000 rpm until the voltmeter indicates approx O.55 Volts.
5. Quickly increase and decrease the engine speed several times. Verify that when the speed is increased, the meter reads 0.5-1.O Volts, and when the speed is decreased it reads 0V-0.5 Volts.
6. If not as specified, replace the heated oxygen sensor.
INSPECTION OF HEATED OXYGEN SENSOR HEATER
1. Turn the ignition switch OFF.
2. Disconnect the heated oxygen sensor connection.
3. Connect an ohmmeter between the heated oxygen sensor terminals C and D as shown.
4. Measure the resistance of the heating element.
Specification: Approx. 6.0 Ohms (at 20°C (68°F))
5. If not as specified, replace the heated oxygen sensor.