This is an adapter from my Civic they local dealers put for aftermarket multimedia units like my prev Blaupunkt New York 830 works with buttons on steering wheel.
Why you need that?
Because on modern cars, all communication done via CAN bus. Same on most late Hondas. All buttons signals going into CAN and most of aftermarket units (Pioneer, Alpine, Clarion, etc) not have CAN module to decode that signals. So you need an adapter.
How it works?
This one works with voltage change. Other units works with resistance change.
These are readings on ORANGE wire that my adapter outputs
| Idle (nothing pressed) | 4.933 V |
| Volume Down | 3.946 V |
| Volume Up | 3.353 V |
| Seek Forward | 2.735 V |
| Seek Backward | 2.145 V |
| Middle (circle button) | 1.575 V |
Teder Audio
Honda Civic
Hardware version 1.00
Software version 1.07
Date 2013-06-04. I got my car 2013-07-04 - close enough.
Let's crack this sucker open!
Main ICs are:
CPU: STI STM32F103C8 - Mainstream Performance line, ARM Cortex-M3 MCU with 64 Kbytes Flash, 72 MHz CPU, motor control, USB and CAN.
CAN: Microchip MCP2551 - MCP2551 is a high-speed CAN transceiver.
Looks like this unit is made here in Israel by www.erm.co.il.
Below are Honda's main connectors.
Big one with power supply and speakers output.
Smaller one that has CAN bus, AUX in and ACC.
Browns are CAN, violet are AUX L+R in with green (GROUND for them).
42,100 km | 2Y 9M
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