ipodinterfaceforholdencommodorevyvz-sing

Figure 1

The kit contains the following parts:

• 1. iPod cable - three meters long (circled in red).

  2. iPod cable tie (circled in brown).

  3. iPod interface PCB (circled in blue).

  4. Two self tapping screws (circled in purple).

  5. 16 way ribbon cable with IDC socket (circled in black).

Disassembling the head unit

Figure 2 shows a single CD head unit for Holden Commodore VY/VZ.

Figure 2

Undo the four screws holding the head unit front facia as shown on Figure 3. The screwdriver tool (size T8) could be purchased from Farnell:

http://au.farnell.com/wiha/71508/tools-hex-bits-hex-bits-torx-screwdriver/dp/1000239?_requestid=12086

Figure 3

Unplug the facia connector as shown on Figure 4.

Figure 4

Undo the two screws holding the head unit top cover as shown on Figure 5.

Figure 5

Remove the top cover as shown on Figure 6.

Figure 6

Undo the four screws holding the CD player (circled in red on Figure 7).

Figure 7

Carefully unplug the CD ribbon cable connector as shown on Figure 8.

Figure 8

Undo the two screws holding the bottom head unit cover (circled in red on Figure 9).

Figure 9

Remove the head unit bottom cover as shown on Figure 10.

Figure 10

Undo the four screws (two on each side) holding the CD enclosure (two of them circled in red on Figure 11). The screwdriver tool (size T10) for these screws could be purchased from Farnell:

http://au.farnell.com/wiha/71510/tools-hex-bits-hex-bits-torx-screwdriver/dp/1001361?_requestid=12425

Figure 11

Take apart the CD enclosure as shown on Figure 12.

Figure 12 

Soldering the 16 way ribbon cable to the head unit PCB

Partially split the ribbon cable in two between the purple and blue wires as shown on Figure 13.

Figure 13

Insert the six wire part of the ribbon cable in the slot circled in red on Figure 14

Figure 14

Figure 15 shows the cable on the other side of the slot.

Figure 15

Solder the six wires to the head unit PCB as shown on Figure 16. The lengths of all wires but the red one are trimmed accordingly. Important: Do not trim the length of the red wire or the ribbon cable would become too short to reach the iPod interface PCB.

Figure 16

Figure 17 and Figure 18 show closer views of the connection points.

Figure 17

Figure 18

Figure 19 shows the approximate position of the IDC socket considering where the iPod interface PCB would be attached later on. The excess ribbon cable wires length could be trimmed in the next few steps considering the IDC socket position on Figure 19.

Figure 19

Split the purple, gray, white and black wires and solder them to the head unit PCB as shown on Figure 20.

Figure 20

Figure 21 shows closer view of the four connections.

Figure 21

Split the brown, red and orange wires and solder them to the head unit PCB as shown on Figure 22.

Figure 22

Figure 23 and Figure 24 show closer view of the three connections.

Figure 23

Figure 24

Split the yellow, green and blue wires and solder them to the head unit PCB as shown on Figure 25.

Figure 25

Figure 26 shows closer view of the three connections.

Figure 26

Connecting the iPod interface PCB with the ribbon cable and the iPod cable

Make threads in the two holes circled in red on Figure 27 with the provided self tapping screws.

Figure 27

Rotate the screwdriver slowly forwards and backwards without applying much force until the screw fully goes through the hole (Figure 28).

Figure 28

Connect the iPod cable and the ribbon cable (circled in red on Figure 29) to the iPod interface PCB. Note the orientation of the ribbon cable – the blue wire end is on the left, the brown wire end is on the right. Important: If the ribbon cable connector is connected backwards, the iPod interface PCB will be damaged when the head unit is powered up.

Figure 29

Figure 30 shows closer view of the two cable connections.

Figure 30

Attach the iPod interface PCB with the provided two self tapping screws (circled in red on Figure 31).

Figure 31

Figure 32 shows the location of the iPod cable inside the head unit enclosure.

Figure 32

Insert the provided cable tie in the head unit enclosure hole circled in red on Figure 33. Note how the cable tie head is oriented upwards.

Figure 33

Insert the cable tie end in the second hole circled in red on Figure 34.

Figure 34

Figure 35 shows the cable tie loop from the outside of the head unit.

Figure 35

Insert the iPod cable in the tie loop as shown on Figure 36.

Figure 36

Figure 37 shows the layout of the iPod cable inside the head unit enclosure before the cable tie is tightened.

Figure 37

Tighten the cable tie as shown on Figure 38.

Figure 38

Figure 39 shows the tightened cable tie from the outside of the head unit.

Figure 39

Assemble back the head unit. Figure 40 shows the assembled head unit with the iPod cable.

Figure 40

Testing the iPod interface

Figure 41 shows the Holden VY/VZ head unit connector pinout diagram.

Figure 41

To test the iPod interface with the head unit on a bench (before it is installed in the car), the following items are required:

1. The modified head unit (shown on Figure 40).

2. iPod with 30-pin socket (to be connected to the iPod cable).

3. 12 V, 2A DC power supply to power the head unit.

4. Two sockets to be connected to the bottom and middle connectors (Figure 41) of the head unit. Appropriate socket connectors with wiring could be purchased from eBay.

5. 1.2K resistor.

6. Two speakers.

To get the head unit working on the bench:

1. Connect the left channel speakers to LF+, LF- pins and the right channel speaker to RF+, RF- pins.

2. Connect one end of the 1.2K resistor to the REM GND pin. When the other end of the resistor is momentarily connected to the head unit chassis it simulates steering wheel MODE button press.

3. Connect the power supply ground terminal to GND pin.

4. Connect the power supply +12V terminal to BATT+ and ACC+ pins.

The head unit will power up and ask for PIN code. Enter the head unit PIN code. Connect the iPod to the iPod interface cable. The iPod should start playing through the speakers and the head unit LCD should display IPOD. Next perform testing of the iPod functionality as per the demo video bellow:

Use the 1.2K resistor to simulate steering wheel MODE button press. Verify that the iPod is charging. Verify proper operation of the left/right audio channels by changing the head unit volume balance.

Once the iPod interface is verified to work as per the video, it is ready for installation in the car. The following link points to the instructions of how to install the head unit with the iPod interface into the car:

holdenvyvzheadunit(withipodinterface)ins