CONTROL SYSTEM

F-138prose procedure

OXYGEN SENSOR

CAUTION

Obtain the code number and deactivate the audio anti-theft system before disconnecting the battery. (Refer to page T-113.)

1
Warm up the engine and run it at idle.
2
Disconnect the oxygen sensor connector.
3
Connect a voltmeter between the oxygen sensor and a ground.
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4
Run the engine at 3,000 rpm until the voltmeter indicates approx. 0.55V.
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5
Increase and decrease the engine speed suddenly several times. Verify that when the speed is increased the meter reads 0.5V—1.0V, and when the speed is decreased it reads 0V—0.4V.
6
If not as specified, replace the oxygen sensor.

1
Warm up the engine to normal operating temperature.
2
Connect the SST to the diagnosis connector.
3
Set the SST as shown.
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4
Increase the engine speed to between 2,000 and 3,000 rpm, and verify that the moniter lamp flashes for 10 sec. If not as specified, replace the oxygen sensor. (Refer to page F-139.)
Monitor lamp: Flashes more than 8 times/10 seconds
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5
Turn the ignition switch OFF.
6
Disconnect the negative battery terminal and depress the brake pedal for at least 5 sec. to eliminate the malfunction code that was created during inspection from the control unit memory.
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