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CAR ISO Connector Pinouts

ISO 10487 defines a standard for connectors for the head unit to the car’s electrical system, consisting of a system of four different connectors typically used in head units for car audio.

 ISO 10487 connector pin-out (plug side of male, wiring side of female)

Parts

Part 1 of the standard is dedicated to “Dimensions and general requirements” and Part 2 to “Performance requirements”.

Power (A)

The first connector A is always present, is usually black in colour, and contains pins for power-supply, off/on (typically controlled by ignition key), optional control for a motorized antenna and so on.

  • On some cars the +12V Ignition and Battery positions are reversed, such as later Volkswagen Group cars, Peugeot 106,Vauxhall Astra, Citroën C3.
  • Pin 1 is optional; used for speed dependent volume control and possibly navigation.
  • Pin 2 is optional; used for phone mute
  • Pin 3 is optional; used for reversing lamp signal on Becker radios with navigation.
  • Pin 6 is optional; used for vehicle instrument illumination

Loudspeaker (B)

The second connector B is for connecting four loudspeakers, front, rear, left and right, and is usually brown in colour.

Miscellaneous (C)

The connector C is optional. Some times, it appears as one 20-pin connector, often red in colour, or it may be divided into three separate connectors which may be hooked together, in which case C1 is usually yellow, C2 is usually green which C3 is usually blue in colour. The contact spacing is narrower than the other connectors, so the C connector is sometimes referred to as mini-ISO.

C1 (external amplifier)
1) line out left rear 4) line out left front
3) line out common ground 6) +12V switched (out)
2) line out right rear 5) line out right front
C2 (remote control)
7) receive data 10) +12V switched (out)
9) chassis ground 12) remote control ground
8) transmit data 11) remote control in
C3 (CD changer)
13) data in (bus) 16) +12v switched (out) 19) audio left
15) +12v permanent (out) 18) audio ground
14) data out 17) data ground 20) audio right

Note: ISO 10487 only defines the physical attributes of the connectors, not the pin/signal designations, which are manufacturer-defined. The example above is oriented towards VW vehicles only.

Navigation (D)

The connector D is for satellite navigation systems. It has 10 pins.

CAR ISO Connector CAR_ISO_Connector_Pins2

Source: ElectroDroid and Wikipedia

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