MPV 4WD V6-180 2954cc 3.0L FI (1989)
Oxygen Sensor: Testing and Inspection
1. Warm up the engine and run it at idle.
2. Disconnect the oxygen sensor wiring harness connector.
Oxygen Sensor Inspection
3. Connect a voltmeter between the oxygen sensor connector "A" (oxygen sensor side) and ground.
4. Increase and decrease the engine speed suddenly several times. When the speed is increased check that the voltmeter reads between 0.5 and 1.0
volts. When the speed is decreased check that the voltmeter reads between 0 and 0.4 volts. Reconnect the oxygen sensor connector.
5. If not as specified, replace the oxygen sensor.
Test Connector
6. Connect the self diagnostic tester to the check connector.
NOTE: Do not ground the test connector (Green:1-pin) during this test.
Self-Diagnosis Checker
7.
Increase the engine speed to between 2,000 and 3,000 rpm and check that the monitor lamp flashes for 10 seconds. It should flash eight or more
times in the ten second period. Disconnect the diagnostic tester.
8. Disconnect the oxygen sensor wiring harness connector.
