Toyota Corolla (E120): Terminals of ecu

1. Radio receiver assy

Problem symptoms table

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    Bluetooth® audio/phone
    The following can be performed using Bluetooth® wireless communication: ■ Bluetooth® audio The Bluetooth® audio system enables you to enjoy music played on a portable player from the vehicle speakers via wireless communication. This audio system supports Bluetooth®, a wireless data sy ...

    Sound quality is bad in all modes (volume is too low)
    Wiring diagram Inspection procedure 1 Adjust sound quality Adjust the sound quality.  Operate the radio receiver assy to adjust the sound quality. Standard: malfunction disappear. 2 Compare it with another car of same model Compare it with another vehicle of the same mo ...

    Inspection
    1. Inspect sliding roof limit switch Inspect the sliding roof limit switch continuity. Standard: If the continuity is not as specified, replace the switch. 2. Inspect sliding roof drive gear sub–assy Connect the positive (+) lead from the battery to terminal 2 and the ne ...