Circuit/System Description

WARNING: This page is about a different variant/trim than selected.

For an overview of the component/system, refer to Heated Oxygen Sensor Description and Operation

Circuit	Description
Signal - Terminal 4	The control module input circuit has an internal resistance connected to 5 V.
Signal - Terminal 3	The control module input circuit has an internal resistance connected to ground.

Component	Description
B52 Heated Oxygen Sensor	Non-linear or switching-type oxygen sensors work similar to a fuel cell. Two electrodes on a ceramic element provide an output voltage that corresponds to the quantity of oxygen in the exhaust relative to that in the atmosphere. The atmospheric air is supplied to the sensor through the wiring harness. The sensors only indicate that the mixture is "lean" or "rich", but not how "lean" or how "rich".
K20 Engine Control Module	The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the engine actuators accordingly.

Component

Description

B52 Heated Oxygen Sensor

Non-linear or switching-type oxygen sensors work similar to a fuel cell. Two electrodes on a ceramic element provide an output voltage that corresponds to the quantity of oxygen in the exhaust relative to that in the atmosphere. The atmospheric air is supplied to the sensor through the wiring harness. The sensors only indicate that the mixture is "lean" or "rich", but not how "lean" or how "rich".

K20 Engine Control Module

The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the engine actuators accordingly.