VY Dash code tinkering.

[pman92]

Are you trying to get 6 gears display on the cluster? Or you want to see what chatter the cluster outputs when its told there is 6 gears?

6 gears displaying on cluster

I'm just playing with a cluster here now, and it looks like there's a configuration option for 4 or 5 speed auto in the cluster.
It displays P,R,N,D,3,2,1 when set to 4 speed, and P,R,N,D,4,3,L when set to 5 speed (which makes sense).
These both come from the same 3 bits in the PCM/PIM data, and they are the only 2 ways I can make it function.

Since there's only 3 bits in that PCM/PIM location (leaving 7 options, 000 is invalid), whatever is making it display a 6th gear (I'm not sure if it actually displays 6, maybe it displays "PRND54L" ?) must be located elsewhere in the PCM/PIM data if it even exists at all.
That would also make sense - the first 13 bytes of the PCM/PIM data are identical between VT/VX and VY/VZ (just offset by 1). All of the functionality/options that were added later in VY/VZ are located in 5 additional bytes tacked onto the end. EG. flags for 6.0L engine options, flag bit for 5 speed auto, flag bits for cruise control lights (which must of been hardwired on VT/VX), fuel level data for VZ.

I'm wondering if there is even a way to make it display 6 gears. Its weird that it depends on cluster configuration between 4 and 5 speed auto, but the PIM can send chatter data to make it a 6 speed auto without reconfiguring the cluster.

[Tre-Cool]

I can only assume the gear number display comes from the pim via canbus when Driver shift control is activated, so there might not be anything in the dash itself that needs to be found or encoded.

Whethor the dash is programmed as a 4 or 5 speed makes no difference when i tested with the 6l80e. As soon and i activated tapshift mode it switches to the large number display and shows the relevant gear your in.

this was with a vz dash, i've not retested with a vy unit because the last time i did years ago the dash did not like the aldl data getting sent to from the later 2010 ecu's.

[pman92]

I'll go back and have another look at this.

I did find the "active select" / tapshift enabled bit in the ALDL data using tech2win. It must be somehow related to that.

[Tre-Cool]

You've seen this video of mine yeah?

https://youtu.be/Kv_EloAq6Mc

[pman92]

This might be a bit off-topic, but thought I would share anyway. Might be useful to someone in the future.

I had someone send me a 2004 Pontiac GTO cluster. They wanted to use it in their VY and wanted me to program it to suit.
Turns out it was a new in the box cluster. Has never been used. Unprogrammed. After a bit of googling, it looks like you can buy them new old stock (https://www.hawksmotorsports.com/2004-0 ... -92180609/)

Anyway after a bit of hair pulling, trying to work out why I had no comms with it, I worked out they use a completely different pinout to VY (even though they use the same grey connector):

GTO_pinouts.png (46.62 KiB) Viewed 5334 times

I ended up pulling it apart and reading the EEPROM with a clip. Bin file is attached.

I also pulled the eeprom off and temporarily put a Holden file on it. It seemed to work fine. Holden logo at bootup. Interestingly the KM/H light was illuminated automatically, rather than the MPH.

Unfortunately I don't think its going to really work in a VY with the fuel gauge situation.
It might work in a VZ with a bit of wiring modification, if you don't care for ABS / TC / MIL / Cruise lamps