Mounting locations of emission control system units on a 4-cylinder engine
1. Diagnostic connector; 2. Vacuum distributor controlling the recirculation valve; 3. Recirculation valve; 4. Manifold Absolute Pressure Sensor; 5. Throttle position sensor; 6. Liquid temperature sensor; 7. Ignition coil block; 8. Oxygen sensor
Location of emission control devices on a 6-cylinder engine
1. Diagnostic connector; 2. Recirculation valve; 3. Idle air bypass valve; 4. Throttle position sensor; 5. Flow speed sensor; 6. Ignition unit; 7. Oxygen sensor; 8. Ignition coil units; 9. Liquid temperature sensor
The vehicles in question are equipped with several exhaust gas toxicity reduction systems. These include:
- on-board diagnostic system (OBD system);
- engine management system (EFI system);
- recirculation system (EGR system);
- gasoline vapor recovery system (EVAP system);
- forced crankcase ventilation system (PCV system);
- suction channel selection system (ACIS system);
- catalytic converter.
The specific type of systems used with adjustment data is indicated on the underhood plates (VECI-plate).
Vacuum hose routing sign
