Emission Control and Engine Management Specifications Tightening torques for threaded connections, Nm (unless otherwise stated) Sensor (And) detonation Models with a four-cylinder engine (with nut) — 20 Models with V6 engine 1999-2003 (screw type) — 39 Since 2004 (with...
General information about engine management The vehicle is equipped with several emission control systems to prevent pollution of the atmosphere by exhaust gases containing particles of unburned fuel and fuel vapor from the tank and to maintain good overall...
Information about OBD testers (OBD) 1. For testing engine management systems used on vehicles of later model years, portable testers are used. Because reading diagnostic trouble codes (DTC) from the engine management system is only the first step in...
On-Board Diagnostic Sensors (OBD) Note. Below is a brief description of the purpose, operation and location of each of the important information sensors. Sensor names use standard terminology recommended by the Society of Automotive Engineers (SAE)....
On-Board Diagnostic System (OBD) — output actuators Powertrain control module (RSM) 19. Based on the information it receives from the sensors described above, the PCM controls the pulse width of the fuel injectors (cyclic feed), idle speed, ignition timing, ignition coil...
Accelerator pedal position sensor (APP) — replacement Note. On 2004 and later models, the APP sensor is located on the top edge of the accelerator pedal assembly. The APP sensor and the accelerator pedal are removed as a single unit. 1. Disconnect the ground wire from the...
Camshaft position sensor (SMR) — replacement Models with a four-cylinder engine Note. The CMP sensor is located on the left end of the cylinder head. 1. Disconnect the ground wire from the battery ( see paragraph 1 of chapter 5 ). 2. If necessary, remove the...
Crankshaft position sensor (TFR) — replacement Models with a four-cylinder engine Application. The CKP sensor is located on the front side of the engine - on the timing chain cover next to the crankshaft pulley / damper. 1. Disconnect the ground wire from the...
Engine coolant temperature sensor (EATING) — replacement Attention! Wait until the engine has completely cooled down before starting this procedure. Models with a four-cylinder engine Warning. Handle the ECT sensor with care. Damage to the ECT sensor has a negative effect on...
Knock sensor — replacement Attention! Wait until the engine has completely cooled down before starting this procedure. Models with a four-cylinder engine Note. The knock sensor is located on the underside of the cylinder block. You have to remove...
Mass Air Flow/Intake Air Temperature Sensor (MAF/IAT) — replacement Note. The MAF/IAT sensor is located on top of the air filter housing. 1. Disconnect the ground wire from the battery ( see paragraph 1 of chapter 5 ). 2. Disconnect the MAF sensor electrical connector (pic. 8.2). Pic....
Oxygen Sensors — Replacement General information 1. When servicing the oxygen sensor, observe the following special precautions: Oxygen sensors have a permanently attached flexible wire and electrical connector that cannot be removed from the...
Power steering pressure sensor (PSP) — replacement Attention! Wait until the power steering fluid has cooled completely before starting this procedure. 1. Disconnect the ground wire from the battery ( see paragraph 1 of chapter 5 ). 2. Raise the front of the car and...
Throttle position sensor (TR) — replacement Note. On 1999-2003 models, the TP sensor is located on the throttle body (On 2004 and later models, this sensor is an integral part of the electronic throttle body and cannot be removed.) 1. Disconnect the mass wire...
Transmission range sensor (TR) — replacement Removing Note. The TR sensor is located on the front side of the transmission. 1. Disconnect the ground wire from the battery ( see paragraph 1 of chapter 5 ). 2. Raise the vehicle and place secure supports under it. 3....
Transmission Speed Sensors — Replacement Note. Speed sensors are located on top of the gearbox in the block with the drive axle. The turbine input speed sensor is located on the left end of the gearbox (on the driver's side); The intermediate gear speed sensor...
Powertrain control module (RSM) — replacement Attention! Models covered in this manual are equipped with an assisted restraint system (SRS), better known as «airbag system». To prevent accidental deployment of airbags, which could result in injury, be sure to...
Air Intake Control System — Design Description Note. This system is not used on 2004 and later Lexus PX330 models. At the time of preparing the book for publication, information on the availability of spare parts for this system was not available. 1. The air intake...
Idling air valve (IAC) — replacement Models with a four-cylinder engine Notes. The IAC valve is located on the underside of the throttle body. 1. Disconnect the ground wire from the battery ( see paragraph 1 of chapter 5 ). 2. Remove the throttle body (...
Evaporative Emission System (EVAP) — design description 1. Evaporative Emission System (EVAP) absorbs fuel vapors (mottled hydrocarbons) and, when the engine is running, releases them into the intake manifold, from which they are drawn into the intake ducts, where they mix...
Evaporative Emission System (EVAP) — replacement of elements Attention! Gasoline is highly flammable. Therefore, additional precautions must be taken when working on any honor fuel system or EVAP system. Do not smoke or allow open flames or unprotected light fixtures near the...