Toyota Corolla (E170) 2014–2019 Owners Manual / Interior features / Using Bluetooth® devices / Using the steering wheel switches
Toyota Corolla (E170): Using the steering wheel switches
The steering wheel switches can be used to operate a connected cellular phone or portable digital audio player (portable player).
Operating a Bluetooth® phone using the steering wheel switches
1 Volume
The voice guidance volume cannot be adjusted using these buttons.
2 Off-hook switch
Turns the hands-free system on/starts a call 3 On-hook switch
Turns the hands-free system off/ends a call/refuses a call

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What to do if... (Troubleshooting)
If you have a problem, check the following before contacting your Toyota dealer.
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Toyota Safety Sense 3.0
The Toyota Safety Sense 3.0
consists of the driving
assist systems and contributes
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WARNING
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Hint:
if different dtcs related to different systems that have terminal e2
as the ground terminal are output
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Read freeze frame data using the hand-held tester or the obd ii scan
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