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Home >> Lexus >> 1994 >> ES 300 V6-3.0L (1MZ-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Oxygen Sensor >> Testing and Inspection >> Sub-Sensor
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Sub-Sensor



INSPECTION




1. Disconnect negative (-) terminal cable from battery.

CAUTION: Work must be started after 90 seconds from the time the ignition switch is turned to the LOCK position and the negative (-) terminal cable is disconnected from the battery.

2. Inspect heater resistance of Sub Heated Oxygen Sensor.





- Remove the passenger's seat.
- Take out the console box side of the floor carpet.
- Disconnect the Sub Heated Oxygen Sensor connector.





- Using an ohmmeter. measure the resistance between the terminals +B and HT.

Resistance: 11 - 16 Ohms at 20°C (68°F)

- If the resistance is not as specified, replace the Sensor.
- Reconnect the Sub Heated Oxygen Sensor connector.
- Reinstall the floor carpet.
- Reinstall the passenger's seat.
3. Reconnect negative (-) terminal cable to battery.

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