Engine management system Chevy Trailblazer 1

Exhaust Gas Monitoring and Engine Management Systems — General Information
1.1. Location of engine management and exhaust gas toxicity control system components 1. Manifold Absolute Pressure (MAP) Sensor; 2. Control unit (PCM); 3....

On-Board Diagnostics (OBD) and Trouble Codes
Diagnostic equipment 1. To check the condition of the injection system elements and reduce exhaust toxicity, you need to use a digital multimeter (see...

PCM control unit — removal and installation
Caution: To prevent damage to the electronic unit, an antistatic device must be used when handling it. grounded to the vehicle body. After removal, place the...

Throttle Position Sensor (TPS) — Replacement
1. The TPS sensor is a variable potentiometer connected to the throttle shaft inside the throttle body. The PCM unit receives signals from the TPS sensor and...

Accelerator Pedal Position Sensor (APP) — Replacement
1. The APP sensor consists of two separate elements, from which antiphase signals are sent to the PCM. Based on these pulses, the PCM determines the position...

Manifold Absolute Pressure (MAP) Sensor — Replacement
1. The absolute pressure (MAP) sensor is used to monitor changes in pressure in the intake manifold that occur as engine load and speed change. The sensor...

Supply Air Temperature (IAT) Sensor — Replacement
1. The supply air temperature (IAT) sensor is a thermistor - its resistance changes depending on temperature. The PCM receives a signal whose pulse value is...

Coolant Temperature Sensor (ECT) — Replacement
1. The coolant temperature sensor (ECT) is a thermistor - its resistance changes depending on the temperature. The PCM receives a signal whose pulse value is...

Crankshaft Position Sensor (CPS) — Replacement
1. The crankshaft position sensor (CPS) sends pulses to the PCM, based on which the position of the crankshaft is determined. Based on the signal received, the...

Camshaft Position Sensor (CPS) — Replacement
1. The camshaft position sensor (CPS) is similar in principle to the crankshaft position sensor (CPS), but the CPS sensor generates six pulses per revolution...

Oxygen sensor — replacement
Note: All vehicles described are equipped with two oxygen sensors, located in front of and behind the catalytic converter. 1. The oxygen sensor records the...

Knock Sensor — Replacement
1. The knock sensor reacts to abnormal engine vibration (occurring during detonation or pre-ignition). By constantly adjusting the ignition phase, maximum...

Vehicle Speed Sensor (VSS) — Replacement
1. The vehicle speed sensor (VSS) is a generator of a constant magnetic field. It is located on the gearbox. When the toothed rotor located on the secondary...

Crankcase ventilation system
1. When the engine is running, some of the gases produced during fuel combustion break through the piston rings into the crankcase. Such gases are called...

Fuel Evaporative Emissions (EVAP) System
1. The EVAP (Evaporative Emissions Protection) system is designed to prevent the emission of unburned hydrocarbons into the atmosphere. The vapors enter the...

Camshaft Phase Correction Device Solenoid Valve — Replacement
1. A signal with a 12-volt potential and variable pulse width is sent from the PCM to the device's solenoid valve. The duration of the working cycle determines...

Catalytic converter
Note: Before replacing the converter yourself, consult with the company representative regarding the warranty provided for the catalyst as an element of the...

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