Subaru In-Car Screen: Kenwood FGZ204F2 Wire Ports


Hey. This page is more than two years old! The content here is probably outdated, so bear that in mind. If this post is part of a series, there may be a more recent post that supersedes this one.

The old (Japanese) screen unit in my JDM car was a Kenwood FGZ204F2 system with 4 ports/ harnesses into the back. As part of a plan to replace it with a home brew build, this post is just the outcome my working out what the various pins do.

Sticker on my unit.
The four jacks I have on the back of the unit.

Car interface and audio bus ports

Jacks #1,# 2 and #3

Car Interface 16-pin Port (#1)

The interesting thing here is the CAN H and L pins. From what I gather this the same data that is going through the OBD2 port which also has these pins. 

Hoped there would be a pin for the external ambient air temperature since that was displayed on the old screen. There is not, so it must come through CAN.

Pin
Function
Notes
1+B12V?
2GND
3ACCTypically automotive accessory - the 'on switch' for the old unit?
4GND
5CAN-HCAN H & L are data protocol.
6CAN-LCAN H & L are also pins on the OBD2 port so guess data coming in here is the same
7IGNIgnition
8PARKINGHand brake? Stationary. Neutral. Maybe nothing as my car is manual.
9REVERSEThink this goes poitive when car in reverse...for reversing cam
10SPDIf this is speed, weird that its been given own pin, isolated the CAN data
11ILL(PWM)Illumination? PWM not sure
12ILL(SMALL)Ditto - something to do with backlight
13NCNot used
14NCNot used
15PTTNo idea
16GND

Audio Bus 20-pin Port (#2)

Pin
Function
Notes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

Camera and Navigation Unit

The Rear Camera (#4, the White one) I did not have TV tuner

Navigation Unit 13-pin Circular Port (#3)

To do, maybe, probably will ignore this.

Rear Camera 4-pin Port (#4)

To do, maybe, probably will ignore this and replace with USB camera. 

Series Navigation

<< Subaru Legacy in-Car Screen: What Hardware?Subaru Legacy in-Car Screen: What Software? >>