General Information

1. GENERAL DESCRIPTION 
   1. Articles are written in accordance with SAE J2008.
   2. Generally, repair operations can be separated in the following 3 main processes:
      1. Diagnosis
      2. Removing and Installing, Replacing, Disassembling, Installing and Checking, Adjusting
      3. Final Inspection
   3. Articles explain the 1st process of "Diagnosis" (placed in the "Diagnostics" section), the 2nd process of "Removing and Installing, Replacing, Disassembling, Installing and Checking, Adjusting", but the 3rd process of "Final Inspection" is omitted.
   4. The following essential operations are not written in articles . However, these operations must be done in the practical situation.
      1. Operation with a jack or lift
      2. Cleaning of a removed part when necessary
      3. Visual check
2. PREPARATION 
   1. Use of special service tools (SST) and special service materials (SSM) may be required, depending on the repairing condition. Be sure to use SST and SSM when they are required and follow the working procedure properly.
3. REPAIR PROCEDURES 
   1. Component drawings are included when necessary.
   2. Illustrations are placed as "disassembled parts drawing" so that it enables you to understand the fitting condition of the components.
   3. Non-reuseable parts, grease applied parts, precoated parts and tightening torque are specified in the components drawing.
      Fig 1: Disassembled Parts Drawing

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Tightening torque, oil applying position, and non-reusable parts are described as important points in the procedure.
      NOTE: There are cases where such information can only be indicated by an illustration. In that case, all the information such as torque, oil, etc. are described in the illustration.
   5. Installing procedure of operation items is performed in the reverse order of the removal, and only the important points are described.
   6. Only items with points are described in the procedure, and the operational portion and content are placed using an illustration. In the explanations, details of the operational method, standard value and notice are placed.
   7. There may be a case where the illustrations of the similar models are used. In that case the details may be different from the actual vehicle.
   8. The procedures are presented in a step-by-step format:
      1. The illustration shows what to do and where to do it.
      2. The task heading tells what to do.
      3. The detailed text tells how to perform the task and gives other information such as specifications and warnings

      Example: 

      Illustration: 

      what to do and where 

   Fig 2: Installing Bearing Using SST

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

   This format provides an experienced technician with a FAST TRACK to the necessary information. The task heading can be read at a glance when necessary, and the text below provides detailed information. Important specifications and warnings always stand out in bold type.

4. SERVICE SPECIFICATIONS 
   1. Specifications are presented in bold type throughout articles. You never have to leave the procedure to look up your specifications. The specifications are also found in the Service Specifications section for a quick reference.
5. TERMS DEFINITION 
   TERMS DEFINITION
   
   

   Term	Definition
   WARNING	Indicate the possibility of injury to you or other people.
   CAUTION	Indicate the possibility of damage to the components being repaired
   NOTICE	Provide additional information to help you to perform the repair efficiently.

6. SI UNIT 
   1. The UNITS given in articles are primarily expressed according to the SI UNIT (International System of Unit), and alternately expressed in the metric system and in the English System.

      Example: 

      Torque: 30 N.m (310 kgf.cm, 22 ft.lbf) 

A large number of ECU controlled systems are used in 4RUNNER. In general, the ECU controlled system is considered to be a very intricate system requiring high level of technical knowledge and expert skill to troubleshoot. The fact is, however, that if you proceed to the circuit inspections one by one, troubleshooting of these systems is not complex. If you have adequate understanding of the system and basic knowledge of electricity, accurate diagnosis and necessary repair can be performed to locate and fix the problem. Articles designed through emphasis of the above standpoint to help service technicians perform an accurate and effective troubleshooting, and is compiled for the following major ECU controlled systems: The troubleshooting procedures and how to make use of it are described in ECU CONTROLLED SYSTEM TROUBLESHOOTING .

FOR USING OBDII SCAN TOOL OR HAND-HELD TESTER 

• Before using the scan tool or tester, the scan tool's instruction book or tester's operator manual should be read thoroughly.
• 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.
  1. If the communication is normal when the tester is connected to another vehicle, inspect the diagnosis data link line (Busline) or ECU power circuit of the vehicle.
  2. If the communication is still impossible when the tester is connected to another vehicle, the problem is probably in the tester itself, so perform the Self Test procedures outlined in the Tester Operator's Manual.