For All Of Vehicles: Precaution

1. The TOYOTA TUNDRA is equipped with an SRS (Supplemental Restraint System), such as the driver airbag, front passenger airbag assembly and seat belt pretensioner.

   Failure to carry out service operations in the correct sequence could cause the supplemental restraint system to unexpectedly deploy during servicing, possibly leading to a serious accident.

   Further, if a mistake is made in servicing the supplemental restraint system, it is possible the SRS may fail to operate when required. Before servicing (including removal or installation of parts, inspection or replacement), be sure to read the following items carefully, then follow the correct procedure described in this information.

2. GENERAL NOTICE
   1. Malfunction symptoms of the supplemental restraint system are difficult to confirm, so the diagnostic trouble codes become the most important source of information when troubleshooting. When troubleshooting the SRS, always check the diagnostic trouble codes before disconnecting the battery (see SUPPLEMENTAL RESTRAINT SYSTEM - DIAGNOSTICS for 2005 models or SUPPLEMENTAL RESTRAINT SYSTEM - DIAGNOSTICS for 2006 models).
      Fig 1: Disconnecting Negative (-) Terminal Cable From Battery

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Work must be started after 90 seconds from the time the ignition switch is turned to the LOCK position and the negative (-) terminal cable is disconnected from the battery.

      (The supplemental restraint system is equipped with a back-up power source because if work is started within 90 seconds of disconnecting the negative (-) terminal cable from the battery, the SRS may deploy.)

      When the negative (-) terminal cable is disconnected from the battery, memory of the clock and audio systems will be cancelled. So before starting work, make a record of the contents memorized in each memory system. When work is finished, reset the clock and audio systems as before.

      To avoid erasing the memory of each memory system, never use a back-up power supply from another battery.

   3. Even in case of a minor collision where the SRS does not deploy, the steering wheel pad (see INSPECTION for 2005 models or INSPECTION for 2006 models ), front passenger airbag assembly (see INSPECTION for 2005 models or INSPECTION for 2006 models ), side airbag assembly (see INSPECTION , INSPECTION , INSPECTION for 2005 models or INSPECTIONINSPECTION , INSPECTION for 2006 models), curtain shield airbag assembly (see INSPECTION for 2005 models or INSPECTION for 2006 models ) and seat belt pretensioner (see INSPECTION ) should be inspected.
   4. Never use SRS parts from another vehicle. When replacing parts, replace them with new ones.
   5. Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during repairs.
   6. Never disassemble or repair the airbag sensor assembly, steering wheel pad, front passenger airbag assembly or seat belt pretensioner.
   7. If the airbag sensor assembly, steering wheel pad, front passenger airbag assembly or seat belt pretensioner has been dropped, or if there are cracks, dents or other defects in the case, bracket or connector, replace them with new ones.
   8. Do not directly expose the airbag sensor assembly, steering wheel pad, front passenger airbag assembly or seat belt pretensioner to hot air or flames.
   9. Use a voltmeter/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting of the electrical circuit.
   10. Information labels are attached to the periphery of the SRS components. Follow the instructions on the labels.
   11. After work on the supplemental restraint system is completed, check the SRS warning light (see CHECK MODE PROCEDURE for 2005 models or CHECK MODE PROCEDURE for 2006 models).
3. 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 troubles may result. Refer to INSTALLATION , INSTALLATION for 2005 models or or INSTALLATION for 2006 models concerning correct steering wheel installation.

   Fig 2: Identifying Steering Column Matching Marks

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. STEERING WHEEL PAD (with Airbag)
   1. When removing the steering wheel pad or handling a new steering wheel pad, it should be placed with the pad top surface facing up.

      Storing the pad with its metallic surface upward may lead to a serious accident if the airbag inflates for some reason. In addition, do not store a steering wheel pad on top of another one.

   2. Never measure the resistance of the airbag squib. This may cause the airbag to deploy, which could cause serious injury.
   3. Grease or detergents of any kind should not be applied to the steering wheel pad.
   4. Store the steering wheel pad where the ambient temperature remains below 93°C (200°F), with low humidity and away from electrical noise.
   5. Before using an electric welder, first disconnect the airbag connector (the connector is yellow and has 4 pins) under the steering column near the combination switch connector.
   6. As a safety measure, always deploy airbags using an SST before DISPOSAL ).

      Deploy airbags in a safe place away from electrical noise.

      Fig 3: Identifying Correct And Wrong Way Of Removing Steering Wheel Pad (With Airbag)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 4: Identifying Wrong Way Of Measuring Resistance In Steering Wheel Pad (With Airbag)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. FRONT PASSENGER AIRBAG ASSEMBLY
   1. Always store a removed or new front passenger air-bag assembly with the airbag deployment side facing up.

      Storing the airbag assembly with the airbag deployment side facing down could cause a serious accident if the airbag inflates.

   2. Never measure the resistance of the airbag squib. This may cause the airbag to deploy, which could cause serious injury.
   3. Grease or detergents of any kind should not be applied to the steering wheel pad.
   4. Store the steering wheel pad where the ambient temperature remains below 93°C (200°F), with low humidity and away from electrical noise.
   5. Before using an electric welder, first disconnect the airbag connector (the connector is yellow and has 4 pins) under the steering column near the combination switch connector.
   6. As a safety measure, always deploy airbags using an SST before disposal DISPOSAL .

      Deploy airbags in a safe place away from electrical noise.

      Fig 5: Identifying Correct And Wrong Way Of Store Removed Or New Front Passenger Air-Bag Assembly

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 6: Identifying Wrong Way Of Measuring Resistance Of Front Passenger Air-Bag Assembly

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. SEAT BELT PRETENSIONER
   1. Never measure the resistance of the seat belt pretensioner. This may cause the seat belt pretensioner to activate, which could cause serious injury.
   2. Never disassemble the seat belt pretensioner.
   3. Never install the seat belt pretensioner in another vehicle.
   4. Store the seat belt pretensioner where the ambient temperature remains below 80°C (176°F), with low humidity and away from electrical noise.
   5. Before using an electric welder, first disconnect the connector (the connector is yellow and has 2 pins).
   6. As a safety measure, always activate the seat belt pretensioner before disposal DISPOSAL . Activate the pretensioner in a safe place away from electrical noise.
   7. The seat belt pretensioner becomes hot after activation. Allow it to cool before disposing. Never use water to cool the seat belt pretensioner.
      Fig 7: Identifying Wrong Way Of Measuring Resistance Of Seat Belt Pretensioner

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. SIDE AIRBAG ASSEMBLY
   1. Always store a removed or new side airbag assembly with the airbag deployment side facing up.

      Storing the airbag assembly with the airbag deployment side facing down could cause a serious accident if the airbag inflates.

   2. Never measure the resistance of the airbag squib (This may cause the airbag to deploy, which is very dangerous.).
   3. Grease should not be attached to the side airbag assembly and the surface should not be cleaned with any kind of detergents.
   4. Store the airbag assembly where the ambient temperature remains below 93°C (200°F), without high humidity and away from electrical noise.
   5. When using electric welding, first disconnect the airbag connector (yellow color and 2 pins) under the seat before starting work.
   6. When disposing of a vehicle or the side airbag assembly alone, the airbag should be deployed using an SST before disposal DISPOSAL , DISPOSAL or DISPOSAL .

      Perform the operation in a safe place away from electrical noise.

      Fig 8: Identifying Correct And Wrong Way Of Storing Removed Or New Side Airbag Assembly

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 9: Identifying Wrong Way Of Measuring Resistance In New Side Airbag Assembly

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. CURTAIN SHIELD AIRBAG ASSEMBLY
   1. Always store a removed or new curtain shield airbag assembly in a clear plastic bag, and keep it in a safe place.
      NOTE: Protection bag is not reused.
      CAUTION: Never disassemble the curtain shield airbag assembly
   2. Never measure the resistance of the airbag squib (This may cause the airbag to deploy, which is very dangerous.).
   3. Grease should not be attached to the curtain shield airbag assembly and the surface should not be cleaned with any kind of detergents.
   4. Store the airbag assembly where the ambient temperature remains below 93°C (200°F), without high humidity and away from electrical noise.
   5. When using electric welding, first disconnect the airbag connector (yellow color and 2 pins) into the instrument panel before starting work.
   6. When disposing of a vehicle or the curtain shield airbag assembly alone, the airbag should be deployed using an SST before disposal DISPOSAL .

      Perform the operation in a safe place away from electrical noise.

      Fig 10: Identifying Correct And Wrong Way Of Storing Removed Or New Curtain Shield Airbag Assembly

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 11: Identifying Wrong Way Of Measuring Resistance Of Curtain Shield Airbag Assembly

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
9. AIRBAG SENSOR ASSEMBLY
   1. If an airbag sensor assembly has been involved in a collision where its SRS has deployed, do not reuse it.
   2. The connectors to the airbag sensor assembly should be connected or disconnected with the sensor mounted on the floor. Failure to do so could cause undesired deployment of the SRS.
   3. To avoid serious injury, servicing the SRS must be started 90 seconds after:
      • The ignition switch is turned to the LOCK position.
      • The negative (-) terminal cable is disconnected from the battery.

      Even if only loosening the set bolts of the airbag sensor assembly, you must follow the above guidelines.

10. 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, etc., repair or replace it as shown WIRE HARNESS AND CONNECTOR .

1. Use only unleaded gasoline.
2. Avoid prolonged idling.

   Avoid idling the engine for more than 20 minutes.

3. Avoid spark jump test.
   1. Perform spark jump tests only when absolutely necessary. Perform this test as rapidly as possible.
   2. While testing, never race the engine.
4. Avoid prolonged engine compression measurement.

   Engine compression tests must be done as rapidly as possible.

5. Do not run engine when the fuel tank is nearly empty.

   This may cause the engine to misfire and create an extra load on the converter.

6. Avoid coasting with ignition turned off.
7. Do not dispose of used catalyst with gasoline or oil contaminated parts.

For vehicles with mobile communication systems such as two-way radios and cellular telephones, observe the following precautions.

1. Install the antenna as far away as possible from the ECU and sensors of the vehicle's electronic system.
2. Install the antenna feeder at least 20 cm (7.87 in.) away from the ECU and sensors of the vehicle's electronic systems. For details about ECU and sensor locations, refer to the applicable component's section.
3. Avoid winding the antenna feeder together with other wiring as much as possible, and also avoid running the antenna feeder parallel with other wire harnesses.
4. Check that the antenna and feeder are correctly adjusted.
5. Do not install powerful mobile communications system.