Engine management system Chevy Trailblazer 1

Exhaust gas monitoring and engine management systems — general information
1.1. Location of elements of engine control and exhaust gas toxicity control systems 1. Manifold absolute pressure sensor (MAP); 2. Control unit (PCM); 3....

On-board diagnostic system (OVO) and fault codes
Diagnostic equipment 1. To check the condition of the injection system elements and reduce exhaust toxicity, you must 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 touching it. grounded to the car body. After removal, place the unit...

Throttle position sensor (TPS) — replacement
1. The TPS sensor is a variable potentiometer connected to the throttle shaft inside the throttle block. The PCM receives signals from the TPS sensor, and the...

Accelerator pedal position sensor (APP) — replacement
1. The APP sensor consists of two separate elements from which antiphase signals are supplied to the PCM. Based on these impulses, the RSM determines the...

Manifold absolute pressure sensor (IDA) — replacement
1. Absolute pressure sensor (IDA) used to monitor the change in pressure in the intake manifold that occurs as the load and engine speed changes. Sensor...

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

Coolant temperature sensor (EATING) — replacement
1. Coolant temperature sensor (EATING) is a thermistor - its resistance changes depending on temperature. The PCM receives a signal whose pulse value is...

Crankshaft position sensor (TFR) — replacement
1. Crankshaft position sensor (TFR) sends impulses to the RSM, on the basis of which the position of the crankshaft is determined. Based on the received...

Camshaft position sensor (construction and installation work) — replacement
1. Camshaft position sensor (construction and installation work) the principle of operation is similar to the crankshaft position sensor (TFR), but the CMP...

Oxygen sensor — replacement
Note: all described vehicles are equipped with two oxygen sensors located in front of the catalyst and behind it. 1. The oxygen sensor records the amount of...

Knock sensor — replacement
1. The knock sensor responds to abnormal engine vibration (occurring during detonation or glow ignition). By constantly adjusting the ignition timing, maximum...

Vehicle speed sensor (VSS) — replacement
1. Vehicle speed sensor (VSS) is a generator of a constant magnetic field. It is located on the gearbox. When the gear rotor located on the secondary shaft of...

Crankcase ventilation system
1. When the engine is running, a certain amount of gases formed during the combustion process break through the piston rings into the crankcase. Such gases are...

Evaporative emission system (EVAP)
1. Fuel vapor recovery system (EVAP) serves to prevent the release into the atmosphere of vapors containing unburned hydrocarbons. The vapors enter the...

Electrovalve of the camshaft phase adjustment device — replacement
1. The solenoid valve of the device receives a signal with a 12-volt potential and variable pulse width from the PCM. The duration of the operating cycle...

Catalytic converter
Note: before replacing the converter yourself, consult your representative office regarding the warranty provided for the catalyst as an element of the...