Tacoma Oxygen Sensor Wire Diagram. 1 redwhite heater to ecu. The resistance is not as specified replace the sensor.
3 not the ecu. 3 red oxygen wire to ecu. The catalyst monitor is performed simultaneously.
This confirmation driving pattern is used in the perform confirmation driving pattern procedure of the following diagnostic troubleshooting procedure.
The black brown and red white wires lead to the ecu. If any of these o2 sensors fails ecu can no longer get correct signal outputs for the proper air to fuel ratio which can result in poor engine performance and decreased gas mileage. The catalyst monitor is performed simultaneously. Since the oxygen sensor was original as near as i could tell i purchased a bosch oxygen sensor and wired it in following their direction repairing the damaged wiring along the way.