Starlet L4-1290cc 4KE (1983)
Oxygen Sensor: Testing and Inspection
Fig.40 Checking Oxygen Sensor with Voltmeter
1.
Connect voltmeter to EFI service connector using adapter 09842-14010 or equivalent, Fig. 40. Connector is located in harness with ``Check
Engine'' connector.
2.
Connect suitable tachometer, start engine and run until it reaches normal operating temperature.
3.
Run engine at 2500 RPM for approximately 2 minutes to heat oxygen sensor.
4.
With engine running at 2500 RPM, voltmeter needle should deflect at least 8 times every 10 seconds.