Component Tests and General Diagnostics

HEATED OXYGEN SENSOR (HO2S) INSPECTION

NOTE: Perform the following test only when directed.

1. Connect the WDS or equivalent to the DLC-2. (See ON-BOARD DIAGNOSTIC TEST.)
2. Turn the ignition switch to ON.

Specification:

3. Verify that the O2S11, O2S21, O2S12 and O2S22 PIDs are within the specification.
- If these systems are okay, replace the HO2S.
- If not as specified inspect the following.
- Intake-air system
- Fuel system
- On-Board diagnostic system

Tightening torque: 29 - 49 N.m {3.0 - 5.0 kgf.m, 22 - 36 ft.lbf}

Heater




1. Disconnect the HO2S connector.
2. Measure the resistance between HO2S (front) terminals B and C or between HO2S (rear) terminals C and D using an ohmmeter.
- If not as specified, replace the HO2S.

Specification: Approx. 6 Ohms [20 °C {68 °F}]

Tightening torque: 29 - 49 N.m {3.0 - 5.0 kgf.m, 22 - 36 ft.lbf}