Owner's Manual

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Rev. 020717
Page 1
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AP4-FD21
The AP4-FD21 provides a 6-channel pre-amp output for use with aftermarket audio equipment. Using the full range,
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A data controlled
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Introduction and Features
Important Notes
1. This interface is only compatible in vehicles equipped with a data bus controlled premium sound system. To verify
compatibility, look for a Sony badge on the door speakers, center speaker, or factory sub woofer. If none of these brands are
shown, check for the presence of a center speaker or sub woofer.
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4. The remote output may remain active once the key has been removed if the vehicle needs to pass chime or SYNC audio.
5. If your chimes played through the factory speakers, and all speakers have been disconnected from the factory amp, all
chimes will then play through the speaker in the dash.
6. Channels 5 and 6 are non-fading outputs. The output level of channels 5 and 6 can be controlled using the supplied level
control knob.
7. The chime volume and minimum volume levels are set to 0 dB by default. If you are happy with this level in your particular
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more details.
8. Ford Focus: You cannot use the steering wheel controls to activate the chime and minimum volume adjustment.
9. The level control knob must be connected in order to manually adjust the chime volume and minimum volume settings.
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11. No adjustments can be made manually using the programming button, or the factory SWC when the module is connected to
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Wiring Connection Chart
To Aftermarket
Amplier
Non-FadingRearFront
1(L) 2(R) 4(R) 5(L) 6(R)3(L)
Remote Turn On Output
2A Max Output
To Vehicle
Harness
To Radio
To LCD
Screen
Non-Fading
Level Control
Knob
To Vehicle
Harness