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2006 Toyota Highlander hybrid audio not working
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HiHy2006
New User
May 28, 2024, 9:13 PM
Post #1 of 7
(34632 views)
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2006 Toyota Highlander hybrid audio not working
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Hello,
One day sound from the car stereo just disappeared in my wife's car. It is a 2006 Toyota Highlander hybrid, with JBL speakers, and a radio with navigation.
If I set volume to max I can barely hear music. But sometimes suddenly it kicks in and starts to work normally in the middle of a ride, but then stops working spontaneously again sometimes in a few minutes and sometimes longer.
I've tried to move connectors on the back of the radio and on the amplifier in the trunk, to check for a loose connection. Also swapped the amp with an identical one but it didn't help. Can't figure it out.
Could you help me with troubleshooting?
Thanks
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Hammer Time
Ultimate Carjunky
/ Moderator
May 29, 2024, 4:27 AM
Post #2 of 7
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Re: 2006 Toyota Highlander hybrid audio not working
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That radio has an external amplifier in the back of the vehicle that may be failing but you would need a technician to do some testing for that.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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HiHy2006
New User
May 29, 2024, 9:51 AM
Post #3 of 7
(34609 views)
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Re: 2006 Toyota Highlander hybrid audio not working
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I swapped the amp in the trunk with an identical one, but it didn't help. Today tried to swap the radio unit but it didn't help either.
I can test voltages at the amplifier connectors, but I don't know what to look for.
Any suggestions?
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Hammer Time
Ultimate Carjunky
/ Moderator
May 29, 2024, 10:03 AM
Post #4 of 7
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Re: 2006 Toyota Highlander hybrid audio not working
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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HiHy2006
New User
May 29, 2024, 8:31 PM
Post #5 of 7
(34585 views)
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Re: 2006 Toyota Highlander hybrid audio not working
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Thank you for the wiring diagram.
I've measured different voltages at pins 1 and 2 of the s22 connector of the amplifier in the trunk:
1 Pink (AMP ON): 13.4 V
2 Green (ACC): 14.5 V
Also, the mute pin has a non-zero voltage
12 Brown (MUTE): 4.7 V
Pins 4 and 11 are ~0 V
Pins 5,6,13 and 14 seem to yield small AC voltage, may need to check with headphones for the sound signal
For connector s23:
7 red yellow (+B): 14.4 V
12 white black (PWR GND) 0 V
All other pins have non-zero potential relative to the body (all the voltages above are also measured relative to the body) of about 7 V. But zero voltage between any pair. The resistance of the speakers measured at the connector is 4 ohms.
Could you tell me if any of these readings are out of the expected range?
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HiHy2006
New User
Jun 4, 2024, 7:17 AM
Post #6 of 7
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Re: 2006 Toyota Highlander hybrid audio not working
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Upd: fixed by removing MUTE pin from the connector. These 4.7 volts on the pin basically switched of the amp output.
There is no mute button for the radio, so I suspect it is implemented somewhere in navigation module to enhance voice prompts.
The only problem with the solution is that now I get loud bum when I turn on the radio.
Please let me know if you know a better solution.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 4, 2024, 10:42 AM
Post #7 of 7
(34406 views)
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Re: 2006 Toyota Highlander hybrid audio not working
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You're probably going to need that mute feature for both navigation and bluetooth phone if you have it.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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