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PEDESTRIAN PROTECTION SYSTEM PRECAUTION

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  1. CAUTION:

    Failure to carry out service procedures in the correct sequence could cause pedestrian protection system parts to unexpectedly deploy and possibly lead to serious injuries. Furthermore, if a mistake is made when servicing pedestrian protection system parts, they may fail to operate when required. Before performing servicing (including installation/removal, inspection and replacement of parts), be sure to read the following precautions.


    1. Furthermore, if a mistake is made when servicing pedestrian protection system parts, they may fail to operate when required. Before performing servicing (including installation/removal, inspection and replacement of parts), be sure to read the following precautions.


      • Pedestrian detection ECU assembly

      • Pedestrian detection chamber assembly

      • Pop up hood lifter assembly

      • No. 2 pop up hood lifter assembly

  2. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL


    1. When troubleshooting the SRS, always check for DTCs before disconnecting the cable from the negative (-) auxiliary battery terminal.

    2. After turning the power switch off, disconnect the cable from the negative (-) auxiliary battery terminal.

      Note:

      • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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      • When disconnecting the cable from the negative (-) auxiliary battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

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    3. B004TCX

      Work must be started at least 90 seconds after the power switch is turned off and the cable is disconnected from the negative (-) auxiliary battery terminal.

      CAUTION:

      The SRS is equipped with a back-up power source. If work is started within 90 seconds of disconnecting the cable from the negative (-) auxiliary battery terminal, the pedestrian protection system parts may deploy.

    4. When the cable is disconnected from the negative (-) auxiliary battery terminal, the memory of various systems will be cleared. Because of this, be sure to make a record of the contents memorized in each system before starting work. When work is finished, adjust each system to its previous state.

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  3. GENERAL PRECAUTION


    1. Never disassemble or attempt to repair any of the pedestrian protection system parts.

    2. If any of the pedestrian protection system parts are dropped, or if any cracks, dents or other defects are found, replace them with new parts.

    3. Never use pedestrian protection system parts from another vehicle. When replacing parts, use new parts.

    4. Do not expose any of the pedestrian protection system parts directly to high temperatures or flames.

    5. If the vehicle has been involved in a minor collision where the pop up hood lifter assembly did not deploy, the pedestrian protection system parts should be inspected before further use of the vehicle.

    6. Do not apply grease, detergent, oil or water to the pedestrian protection system parts. If applied, immediately wipe it off with a dry cloth.

    7. When deploying or storing the pedestrian protection system parts, avoid places with a high temperature (ambient temperature of 115°C [239°F] or higher) and high humidity, and keep them away from electrical noise.

    8. When disposing of the vehicle or an SRS part by itself, deploy it using SST before disposal.

      CAUTION:
      B004XTF

      Dispose of the pop up hood lifters according to the disposal procedures for each pop up hood lifter.


    9. Never measure the resistance of the pop up hood lifter assembly.

      CAUTION:
      B004W7R

      The pop up hood lifter assembly may deploy due to the tester input.

    10. Use a voltmeter/ohmmeter with high impedance (minimum = 10 kΩ) for troubleshooting electrical circuits.

    11. Be sure to check the pop up hood lifter assembly multi-information display after checking, removing and installing, or replacing the pedestrian detection chamber assembly.

  4. PRECAUTION FOR POP UP HOOD LIFTER ASSEMBLY AND NO. 2 POP UP HOOD LIFTER ASSEMBLY


    1. Always place a removed pop up hood lifter with the extended section facing upward.

      CAUTION:

      Placing the pop up hood lifter assembly and No. 2 pop up hood lifter assembly with the extended portion facing downward could cause a serious accident if the pop up hood lifter deploys.

    2. When storing the pop up hood lifter assembly and No. 2 pop up hood lifter assembly, do not place objects on top of them or pile up the pop up hood lifter assemblies.

  5. PRECAUTION FOR PEDESTRIAN DETECTION CHAMBER ASSEMBLY AND FRONT BUMPER ENERGY ABSORBER


    1. When the SRS parts are deployed (including when only a pretensioner or pop up hood lifter assembly operates) due to a collision, be sure to replace all sensors in the vehicle body deformed areas (anywhere in need of repair) and pedestrian detection ECU assembly.

    2. Replace sensors with new ones even if they are not in the vehicle body deformed areas (anywhere in need of repair) when the vehicle body has been subjected to a large collision and if there are any defects as mentioned below.


      1. The defects are as follows:


        • Cracks in the sensor housing

        • Dents in the sensor housing

        • Chips in the sensor housing

        • Cracks or other damage to the connector

        • Damage to the serial number

    3. When removing and installing the pop up hood sensor and pedestrian detection ECU assembly connectors, be sure to perform work with the sensors installed to the vehicle.

    4. Do not use a sensor if dropped during operation.

    5. Do not use a sensor if subjected to any strong impact.

    6. Never disassemble or attempt to repair any of the pedestrian protection system parts.

    7. Disconnect and reconnect the connector while supporting the pedestrian detection chamber assembly.

    8. The front bumper energy absorber is part of the pedestrian detection chamber assembly. Therefore, if there are any signs it has been subjected to a strong impact or is deformed, do not use it.

  6. PRECAUTION FOR WIRE HARNESS AND CONNECTOR


    1. All wire harnesses except unexposed harnesses in the engine compartment are colored yellow.

    2. As special connectors are used, be careful when handling them.

  7. WHEN SERVICING DAMAGED VEHICLE


    1. If the engine hood lock is released after the pop up hood lifter is deployed, the engine hood could be lifted up considerably more than usual.

    2. Before using an electric welder on the vehicle, remove the pop up hood lifter assembly.

    3. Before performing repairs, remove the pedestrian detection chamber assembly if any impact is likely to be applied to them during repairs.

    4. Do not expose the pedestrian detection chamber assembly to high temperatures.

    5. As the pop up hood lifter assembly is very hot after being deployed, ensure that all the surrounding wire harnesses and connectors are not damaged.

  8. CONDITIONS WHEN INSPECTION OF PEDESTRIAN PROTECTION SYSTEM IS NECESSARY


    1. When the vehicle is damaged in a collision even when the pop up hood lifter assembly is not deployed.

    2. When SRS system and pedestrian protection system DTCs are output.

    3. When there are signs of damage or deformation to the front bumper.

    4. When any of the airbags or pop up hood lifter assemblies deploy.