Circuit Description
WARNING: This page is about a different car, the 2002 Isuzu Trooper. However, it is still accessible from the selected car via links, so may be relevant.
PCM monitors various sensors to determine engine operating conditions. PCM controls fuel delivery, spark advance, transmission operation and emission control device operation based on sensor inputs. PCM provides a sensor ground to all sensors. PCM applies 5-volts through a pull-up resistor, and determines status of following sensors by monitoring voltage present between 5-volt reference and resistor:
- Engine Coolant Temperature (ECT) sensor.
- Intake Air Temperature (IAT) sensor.
- Transmission Fluid Temperature (TFT) sensor.
Along with providing a 5-volt reference and sensor ground circuit, PCM monitors separate feedback signals from following sensors to determine their operating status:
- Exhaust Gas Recirculating (EGR) pintle position sensor.
- Manifold Absolute Pressure (MAP) sensor.
- Throttle Position (TP) sensor 1.
- Accelerator Position (AP) sensor 1.
- Accelerator Position (AP) sensor 3.
- Fuel Vapor Pressure (FVP) sensor.
- Crankshaft Position (CKP) sensor.
- Throttle Position (TP) sensor 2.
- Accelerator Position (AP) sensor 2.