Introduction: Overview Scion xB I

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1. GENERAL DESCRIPTION This article is written in accordance with SAE J2008. Repair operations can be separated into 3 main processes: Diagnosis Removing/Installing, Replacing, Disassembling/Reassembling, Checking and Adjusting Final Inspection This article explains the "Diagnosis" (found in each diagnostic article) and "Removing and Installing, Replacing, Disassembling, Installing and Checking, and Adjusting". "Final Inspection" is omitted. The following essential operations are not written in this article. However, these operations must be performed in actual situations. Operations with a jack or lift Cleaning of a removed part when necessary Visual check
2. PREPARATION Use of Special Service Tools (SST) and Special Service Materials (SSM) may be required, depending on the repair situation. Be sure to use SST and SSM when they are required and follow the working procedure properly. A list of SST and SSM is in «PREPARATION»(/scion/xb/i-2003-2007/remont/oem-general-information/#preparation) .
3. REPAIR PROCEDURES A component illustration is placed under the title where necessary. Non-reusable parts, grease application areas, precoated parts and torque specifications are noted in the component illustrations. Example: Torque specifications, grease application areas and non-reusable parts are emphasized in the procedures. NOTE: There are cases where such information can only be explained by using an illustration. In these cases, all the information such as torque, oil, etc. are described in the illustration. The installation procedures are the removal procedures in reverse order. However, only installation procedures requiring additional information are included. Only items with key points are described in the text. What to do and other details are placed in illustrations next to the text. Both the text and illustrations are accompanied by standard values and notices. Illustrations of similar vehicle models are sometimes used. In those cases, specific details may be different from the actual vehicle. Procedures are presented in a step-by-step format: The illustration shows what to do and where to do it. The task heading tells what to do. The explanation text tells how to perform the task. It also has information such as specifications and warnings. Example: HINT: This format provides an experienced technician with a FAST TRACK to the necessary information. The task headings are easy to read and the text below the task heading provides detailed information. Important specifications and warnings are always written in bold type.
4. SERVICE SPECIFICATIONS SPECIFICATIONS are presented in bold-faced text throughout each article. The specifications are also found in «SERVICE SPECIFICATIONS»(ref-224514).
5. TERMS DEFINITION TERMS DEFINITIONS CAUTION Possibility of injury to you or other people. NOTICE Possibility of damage to the components being repaired. HINT Provides additional information to help you perform repairs.
6. SI UNIT The units used in this article comply with the SI UNIT (International System of Units) standard. Units from the metric system and the English system are also provided. Example: Torque: 30 N.m (310 kgf.cm, 22 ft.lbf)

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1. VEHICLE IDENTIFICATION NUMBER The vehicle identification number is stamped on the vehicle identification number plate and certification label, as shown in the illustration. A: Vehicle Identification Number Plate B: Certification Label
2. ENGINE SERIAL NUMBER AND TRANSAXLE SERIAL NUMBER The engine serial number is stamped on the cylinder block of the engine and the transaxle serial number is stamped on the housing as shown in the illustration. A: 1NZ-FE B: C50 C: U340E

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1. BASIC REPAIR HINT HINTS ON OPERATIONS JACKING UP AND SUPPORTING VEHICLE Care must be taken when jacking up and supporting the vehicle. Be sure to lift and support the vehicle at the proper locations (see «VEHICLE LIFT AND SUPPORT LOCATIONS»(ref-224507-S26822580122006031000000) ). PRECOATED PARTS Precoated parts are bolts and nuts that are coated with a seal lock adhesive at the factory. If a precoated part is retightened, loosened or moved in anyway, it must be recoated with the specified adhesive. When reusing a precoated part, clean off the old adhesive and dry the part with compressed air. Then apply new seal lock adhesive appropriate to that part. Some seal lock agents harden slowly. You may have to wait for the seal lock agent to harden. GASKETS When necessary, use a sealer on gaskets to prevent leaks. BOLTS, NUTS AND SCREWS Carefully follow all the specifications for tightening torques. Always use a torque wrench. NOTE: Perform the torque with the lower limit value of the torque tolerance. FUSES When replacing fuses, be sure that the new fuse has the correct amperage rating. DO NOT exceed the rating or use one with a lower rating. CLIPS The removal and installation methods of typical clips used in body parts are shown in the table below ( (Scheme 11)and (Scheme 12) ). HINT: If clips are damaged during a procedure, always replace the damaged clip with a new clip. REMOVAL AND INSTALLATION OF VACUUM HOSES To disconnect vacuum hose, pull and twist from the end of the hose. Do not pull from the middle of the hose as this may cause damage. When disconnecting vacuum hoses, use tags to identify where they should be reconnected. After completing the job, double check that the vacuum hoses are properly connected. The label under the hood shows the proper layout. When using a vacuum gauge, never force the hose onto a connector that is too large. Use a step-down adapter for adjustment. Once the hose has been stretched, it may leak air. TORQUE WHEN USING TORQUE WRENCH WITH EXTENSION TOOL If SST or an extension tool is combined with the torque wrench to extend its length, do not tighten the torque wrench to the specified torque values in this article. The actual torque will be excessive. Use the formula below to calculate special torque values for situations where SST or an extension tool is combined with the torque wrench. Formula: T' = T x L2/(L1 + L2) DEFINITION OF FORMULA VARIABLES T' Reading of torque wrench {N.m (kgf.cm, ft.lbf)} T Torque {N.m (kgf.cm, ft.lbf)} L1 Length of SST or extension tool {cm (in.)} L2 Length of torque wrench {cm (in.)}
2. FOR VEHICLES EQUIPPED WITH SRS AIRBAG AND SEAT BELT PRETENSIONER HINT: The SCION xB is equipped with a Supplemental Restraint System (SRS) and seat belt pretensioner. Failure to carry out the service operations in the correct sequence could cause the SRS to unexpectedly deploy during servicing and lead to serious injury. Furthermore, if a mistake is made when servicing the SRS, it is possible that the SRS may fail to operate properly. Before servicing (including removal or installation of parts, inspection or replacement), be sure to read the following section carefully. GENERAL NOTICE As the malfunction symptoms of the SRS are difficult to confirm, the Diagnostic Trouble Codes (DTCs) become the most important source of information when troubleshooting. When troubleshooting the SRS, always check the DTCs before disconnecting the battery (see «DTC CHECK/CLEAR»(ref-224525-S18064634952006031100000) ). Work must be started at least 90 seconds after the ignition switch is turned to the LOCK position and the negative (-) terminal cable is disconnected from the battery. (The SRS is equipped with a back-up power source. If work is started within 90 seconds after turning the ignition switch to the LOCK position and disconnecting the negative (-) terminal cable from the battery, the SRS may deploy). When the negative (-) terminal cable is disconnected from the battery, clock and audio system memory is erased. Before starting work, make a note of the settings of each memory system. When work is finished, reset the clock and audio systems as before. CAUTION: Never use a back-up power source (battery or other) to avoid erasing system memory. The back-up power source may inadvertently power the SRS and cause it to deploy. In minor collisions where the SRS does not deploy, the horn button assembly, instrument panel passenger airbag assembly and seat belt pretensioner should be inspected before further use of the vehicle (see «REPLACEMENT»(ref-224560-S39411188922006031000000), «ON-VEHICLE INSPECTION»(ref-224560-S24068552552006031000000) and «INSPECTION»(ref-224561-S04550278352006031100000) ). Never use SRS parts from another vehicle. When replacing parts, use new parts. Before repairs, remove the airbag sensor if impacts are likely to be applied to the sensor during repairs. Never disassemble and repair the airbag sensor assembly, horn button assembly, instrument panel passenger airbag assembly, or seat belt pretensioner. Replace the center airbag sensor assembly, side airbag sensor assembly, horn button assembly or the instrument panel passenger airbag assembly, if: 1) damage has occurred from being dropped, or 2) cracks, dents or other defects in the case, bracket or connector are present. Do not directly expose the airbag sensor assembly, horn button assembly, instrument panel passenger airbag assembly, or seat belt pretensioner to hot air or flames. Use a voltmeter/ohmmeter with high impedance (10 kohm/V minimum) for troubleshooting electrical circuits. Information labels are attached to the SRS components. Follow the instructions on the labels. After work on the SRS is completed, check the SRS warning lamp (See «DIAGNOSIS SYSTEM»(ref-224525-S28807549002006031100000) ). SPIRAL CABLE (in Combination Switch) The steering wheel must be fitted correctly to the steering column with the spiral cable at the neutral position, otherwise cable disconnection and other problems may occur. Refer to «SPIRAL CABLE SUB-ASSY»(ref-224560-S29792776352006031000000) for information about correct installation of the steering wheel. HORN BUTTON ASSEMBLY (with Airbag) When removing the horn button assembly or handling a new horn button, it should be placed with the pad surface facing up. (Scheme 18) Placing the horn button with the pad surface facing down may lead to a serious accident if the airbag accidently inflates. Also, do not place anything on top of the horn button. Never measure the resistance of the airbag squib. This may cause the airbag to inflate, which could cause serious injury. Grease or detergents of any kind should not be applied to the steering wheel pad. Store the horn button assembly in an area where the ambient temperature is below 93°C (200°F), the humidity is not high and electrical noise is not nearby. When using electric welding anywhere on the vehicle, disconnect the airbag ECU connectors (4 pins). These connectors contain shorting springs. This feature reduces the possibility of the airbag or seat belt pretensioner deploying due to currents entering the squib wiring. When disposing of the vehicle or the horn button assembly by itself, the airbag should be inflated using an SST before disposal (see «DISPOSAL»(ref-224560-S28545252052006031000000) ). Activate in a safe place away from electrical noise. Example: INSTRUMENT PANEL PASSENGER AIRBAG ASSY Always place a removed or new instrument panel passenger airbag assembly with the airbag inflation direction facing up. Placing the airbag assembly with the airbag inflation direction facing down could cause a serious accident if the airbag inflates. Never measure the resistance of the airbag squib. This may cause the airbag to inflate, which could cause serious injury. Grease or detergents of any kind should not be applied to the instrument panel passenger airbag assembly. Store the airbag assembly in an area where the ambient temperature is below 93°C (200°F), the humidity is not high and electrical noise is not nearby. When using electric welding anywhere on the vehicle, disconnect the airbag ECU connectors (4 pins). These connectors contain shorting springs. This feature reduces the possibility of the airbag deploying due to currents entering the squib wiring. When disposing of a vehicle or the airbag assembly unit by itself, the airbag should be deployed using SST before disposal (see «DISPOSAL»(ref-224560-S23157019302006031000000) ). Activate in a safe place away from electrical noise. Example SEAT BELT PRETENSIONER Never measure the resistance of the seat belt pretensioner. This may cause the seat belt pretensioner to activate, which could cause serious injury. Never disassemble the seat belt pretensioner. Never install the seat belt pretensioner on another vehicle. Store the seat belt pretensioner in an area where the ambient temperature is below 80°C (176°F), the humidity is not high and electrical noise is not nearby. When using electric welding anywhere on the vehicle, disconnect the airbag ECU connectors (2 pins). These connectors contain shorting springs. This feature reduces the possibility of the airbag deploying due to currents entering the squib wiring. When disposing of a vehicle or the seat belt pretensioner unit by itself, the seat belt pretensioner should be activated before disposal (see «DISPOSAL»(ref-224561-S04308327762006031100000) ). Activate in a safe place away from electrical noise. As the seat belt pretensioner is hot after being activated, allow some time for it to cool down sufficiently before disposal. Never apply water to try to cool down the seat belt pretensioner. Grease, detergents, oil or water should not be applied to the front seat outer belt. Example AIRBAG SENSOR ASSEMBLY Never reuse an airbag sensor assembly that has been involved in a collision where the SRS has deployed. The connectors to the airbag sensor assembly should be connected or disconnected with the sensor mounted on the floor. If the connectors are connected or disconnected while the airbag sensor assembly is not mounted to the floor, the SRS may activate. Work must be started at least 90 seconds after the ignition switch is turned to the LOCK position and the negative (-) terminal cable is disconnected from the battery, even if only loosening the set bolts of the airbag sensor assembly. WIRE HARNESS AND CONNECTOR The SRS wire harness is integrated with the instrument panel wire harness assembly. All the connectors in the system are a standard yellow color. If the SRS wire harness becomes disconnected or the connector becomes broken, repair or replace it.
3. ELECTRONIC CONTROL REMOVAL AND INSTALLATION OF BATTERY TERMINAL Before performing electronic work, disconnect the cable from the battery's negative (-) terminal to prevent component and wire damage caused by accidental short circuits. When disconnecting the terminal cable, turn the ignition switch and lighting switch OFF and loosen the terminal nut completely. Perform these operations without twisting or prying the terminal. Remove the battery cable from the battery post. Clock settings, radio settings, audio system memory, DTCs and other data are erased when the battery cable is disconnected. Record any necessary data before disconnecting the battery cable. HANDLING OF ELECTRONIC PARTS Do not open the cover or case of the ECU unless absolutely necessary. If the IC terminals are touched, the IC may be rendered inoperative by static electricity. To disconnect electronic connectors, pull the connector itself, not the wires. Be careful not to drop electronic components, such as sensors or relays. If they are dropped on a hard surface, they should be replaced. When cleaning the engine with steam, protect the electronic components, air filter and emissions-related components from water. Never use an impact wrench to remove or install temperature switches or temperature sensors. When checking the resistance of a wire connector, insert the tester probe carefully to prevent terminals from bending.
4. REMOVAL AND INSTALLATION OF FUEL SYSTEM PARTS PLACE FOR REMOVING AND INSTALLING OF FUEL SYSTEM PARTS Work in a location with good air ventilation that does not have welders, grinders, drills, electric motors, stoves, or any other ignition sources. Never work in a pit or near a pit as vaporized fuel will collect in those places. REMOVING AND INSTALLING OF FUEL SYSTEM PARTS Prepare a fire extinguisher before starting operation. To avoid static electricity, install a ground wire to the fuel changer, vehicle and fuel tank, and do not spray the surrounding area with water. Be careful when performing work in this area, as the work surface will become slippery. Do not clean up gasoline spills with water, as this may cause the gasoline to spread, and possibly create a fire hazard. Avoid using electric motors, work lights and other electric equipment that can cause sparks or high temperatures. Avoid using iron hammers as they may create sparks. Dispose of fuel-contaminated cloth separately using a fire resistant container.
5. REMOVAL AND INSTALLATION OF ENGINE INTAKE PARTS If any metal particles enter the inlet pass, this may damage the engine. When removing and installing the inlet system parts, cover the openings of the removed parts and engine openings. Use gummed tape or other suitable materials. When installing the inlet system parts, check that no metal particles have entered the engine or the installed part.
6. HANDLING OF HOSE CLAMPS Before removing the hose, check the clamp position so that it can be reinstalled in the same position. Replace any deformed or dented clamps with new ones. When reusing a hose, attach the clamp on the clamp track portion of the hose. For a spring type clamp, you may want to spread the tabs slightly after installation by pushing in the direction of the arrow marks as shown in the illustration.
7. FOR VEHICLES EQUIPPED WITH MOBILE COMMUNICATION SYSTEMS Install the antenna as far away from the ECU and sensors of the vehicle electronic systems as possible. Install an antenna feeder at least 20 cm (7.87 in.) away from the ECU and sensors of the vehicle electronic systems. For details of the ECU and sensors locations, refer to the section on applicable components. Keep the antenna and feeder separate from other wirings as much as possible. This will prevent signals from the communication equipment from affecting vehicle equipment and vice-versa. Check that the antenna and feeder are correctly adjusted. Do not install any high-powered mobile communication system.
8. FOR VEHICLES EQUIPPED WITH TRACTION CONTROL (TRAC) SYSTEM When testing with a 2-wheel drum tester such as a speedometer tester, a combination tester of the speedometer and brake, a chassis dynamometer, or when jacking up the front wheels and driving the wheels, always turn the TRAC system OFF via the TRAC cut (TRAC OFF) switch before testing. NOTE: TRAC system OFF condition can be confirmed by the TRAC OFF warning indicator in the combination meter. Confirm TRAC system is OFF Press the TRAC cut (TRAC OFF) switch to turn off the TRAC system. Check that the TRAC OFF indicator illuminates. HINT: The SLIP indicator should always operate right after the engine is restarted. Begin testing. Press the TRAC cut (TRAC OFF) switch to turn on the TRAC system and check that the TRAC OFF indicator turns off. HINT: The SLIP indicator lamp blinks when the TRAC system is operating.
9. FOR VEHICLES EQUIPPED WITH VEHICLE STABILITY CONTROL (VSC) SYSTEM NOTICES WHEN USING DRUM TESTER Before beginning testing, disable the Vehicle Stability Control (VSC) system. To disable the VSC, turn the ignition switch OFF and connect SST to terminals TS and CG of the DLC3. SST 09843-18040 NOTE: Confirm that the VSC warning lamp blinks. VSC system will be reset when the engine is restarted. For safety, secure the vehicle with restraint chains while using a wheel dynamometer. NOTICES OF RELATED OPERATIONS TO VSC Do not carry out unnecessary installation and removal as it might affect the adjustment of the VSC related parts. Be sure to follow the instructions for work preparation and final confirmation of proper operation of the VSC system.
10. FOR VEHICLES EQUIPPED WITH CATALYTIC CONVERTER CAUTION: If a large amount of unburned gasoline or gasoline vapors flow into the converter, it may cause overheating and create a fire hazard. To prevent this, observe the following precautions. Use only unleaded gasoline. Avoid prolonged idling. Avoid idling the engine for more than 20 minutes. Avoid a spark jump test. Perform a spark jump test only when absolutely necessary. Perform this test as rapidly as possible. While testing, never race the engine. Avoid a prolonged engine compression measurement. Engine compression measurements must be performed as rapidly as possible. Do not run the engine when the fuel tank is nearly empty. This may cause the engine to misfire and create an extra load on the converter.

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1. NOTICE ABOUT VEHICLE CONDITION WHEN JACKING UP The vehicle must be unloaded before jacking up the vehicle. Never jack up/lift up a heavily loaded vehicle. When removing heavy equipment such as the engine and transmission, the center of gravity of the vehicle may shift. To stabilize the vehicle: place a balance weight in a location where it will not roll or shift; or use a mission jack to hold the jacking support.
2. NOTICE FOR USING 4 POST LIFT Follow the safety procedures outlined in its instruction manual. Use precautionary measures to prevent the free beam from damaging tires or wheels. Use wheel chocks to secure the vehicle.
3. NOTICE FOR USING JACK AND SAFETY STAND Work in a flat area using wheel chocks at all times. Use a safety stand with a rubber attachment, as shown in the illustration. Apply the jack and rigid rack to the specified location on the vehicle. When jacking up the front wheels, release the parking brake and place wheel chocks only behind the rear wheels. When jacking up the rear wheels, place wheel chocks only in front of the front wheels. The jack should not be used without the rigid rack. When jacking up only the front wheels or only the rear wheels, place wheel chocks on both sides of the wheels touching the ground. When lowering the vehicle with its front wheels jacked up, release the parking brake and place wheel chocks only in front of the rear wheels. When lowering a vehicle with its rear wheels jacked up, place wheel chocks only behind the front wheels.
4. NOTICE FOR USING SWING ARM TYPE LIFT Follow safety procedures outlined in its instruction manual. Use a swing arm equipped with a rubber attachment, as shown in the illustration. When using the lift, make sure that the vehicle is stabilized so that it will not tilt while work is being performed. Stabilized the vehicle by adjusting the lift arm's length and vehicle's position. When using the lift, its center should be as close to the vehicle's center of gravity as possible (length of "L" should be as short as possible) Set the vehicle on the lift as level as possible. Then match the groove of the cradle to the rigid rack support location. Be sure to lock the swing arms before lifting and during work (if equipped with arm locks). Lift the vehicle up off the ground. Stand at a safe distance and shake the vehicle to check its stability.
5. NOTICE FOR USING PLATE TYPE LIFT Follow the safety procedures outlined in its instruction manual. Use plate lift attachments (rubber lifting blocks) on top of the plate surface. Refer to the table below to determine how to properly set the vehicle. VEHICLE SET POSITIONS Right and left set position Place the vehicle over the center of the lift. Front and rear set position Place the attachments at the ends of the rubber plate surface, under the vehicle lift pad (A and C in (Scheme 33) ). Raise the plate slightly and reposition the vehicle so the top of the attachment (B in (Scheme 33) ) is aligned with the front side notch in the vehicle rocker flange. Lift the vehicle up off the ground, and shake it to make sure that it is stable.

GENERAL INFORMATION

A large number of ECU controlled systems are used in the SCION xB. In general, ECU controlled systems are considered to be very intricate, requiring a high level of technical knowledge to troubleshoot. However, most problem checking procedures only involve inspecting the ECU controlled system's circuits one by one. An adequate understanding of the system and a basic knowledge of electricity is enough to perform effective troubleshooting, accurate diagnoses and necessary repairs. Detailed information and troubleshooting procedures on major ECU controlled systems in this vehicle are outlined below

SYSTEM REFERENCE CHART

FOR USING OBDII SCAN TOOL OR HAND-HELD TESTER

1. Before using the scan tool or tester, the scan tool's instruction book or tester's operator manual should be read thoroughly.
2. If the scan tool or tester cannot communicate with the ECU controlled systems when you have connected the cable of the tester to the DLC3 with the ignition switch and tester turned ON, there is a problem on the vehicle side or tester side. If communication is normal when the tester is connected to another vehicle, inspect the diagnosis data link line (Bus (+) line) or ECU power circuit of the vehicle. If communication is still impossible when the tester is connected to another vehicle, the problem is probably in the tester itself. Perform the Self Test procedures outlined in the tester Operator's manual.

ABBREVIATIONS USED IN THIS ARTICLE

ABBREVIATIONS

See also:
• PREPARATION
• 5. COMBINATION METER