Circuit/System Description
WARNING: This page is about a different variant/trim than selected.
| Circuit | Description |
|---|---|
| 5 V Reference | Regulated voltage supplied by the control module. |
| Signal | The control module input circuit has an internal resistance connected to 5 V. |
| Low Reference | Grounded through the control module. |
| Component | Description |
|---|---|
| B321 Crankcase Pressure Sensor | The sensor is a capacitive pressure transducer. Electronics in the sensor convert pressure into an analog voltage signal. |
| K20 Engine Control Module | The control module contains a microprocessor used to process input data to control outputs. 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. |
This diagnostic monitors the performance of the Positive Crankcase Ventilation (PCV) System.
The sensor B321 is mounted between the following components: Engine Crankcase & Induction System
The pressure sensor is a pressure transducer which outputs a voltage proportional to the gauge pressure between the crankcase ventilation hose and the atmosphere.
The sensor B321 measures the pressure change that varies in conjunction with the engine air flow and pressure pulses as the cylinders go up and down in the crankcase.