HO2S Heater Inspection
WARNING:
- A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system.
CAUTION:
- Do not allow flammable objects such as the taping for bundling a wiring harness to come into contact with the exhaust manifold and silencer.
- Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
- Lift up the vehicle.
- Remove the floor under cover (LH). (See FLOOR UNDER COVER REMOVAL/INSTALLATION .)
- Disconnect the HO2S connector.
- Measure the resistance between HO2S terminals C and D.
- If not as specified, replace the HO2S. (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION .)
HO2S heater resistance
2-50 Ω [normal temperature]