I have a 1996 registered XJS coupe 6.0 V12, I think that it's a 1995 MY as it was built October 1994 according to jaguar heritage.

I do not have a trip computer but I do have an OBDII style connector in the front passenger wheel well. I have connected an OBDII reader to it and it knows that it is connected to something and asks for the VIN to be entered. I do this but it is not then able to read anything.

Does anyone know if I am wasting my time or if there is something that I can do to read the vehicle codes, etc.

It has also been mentioned that the wiring might be there, behind the analogue clock, to plug in a trip computer. Does anyone know if this is true ?

Lee.

 

Lee,

The wiring plug for the clock is the one that is also used for the Trip Computer on your car. I know this, having done the swap on my 4.0 litre car.

Your OBDII reader should be able to read basic OBDII engine codes on your car. I know a guy with a 1996 6.0 litre ( the genuine "made-in-1996" car!) so may be able to try my reader on his car next week and confirm this for you.

Paul

 

Ok, thanks Paul, I have access to an Autel reader, a reasonably high end one. I will try this again is case it works this time for some reason - let me know what your tests yield and let's see what comes of it.

I may look to get a trip computer and swap the veneer surround, from your perspective is it worth it ?

 

Lee,

I use a simple app on my smartphone with a £7 Bluetooth Plugin and it works fine on my car. It needs the engine running before it fully connects. I'll try this setup on my friends 6.0.

I like the look of the trip computer and I do find it very useful because I like figures, although I don't tend to lose sleep over the fuel consumption! That's even more important if you run a 6 litre! Also, fuel gauges suffer from 2 particular problems so the trip computer has been really useful in knowing how much fuel I have left!

It's quite difficult to find good facelift trip computers without paying big money. There's 2 types of illumination - the buttons and the display. The illuminations for the buttons is via soldered bulbs on the circuit board. A bit prone to failing. Ask to see photos of the buttons illuminated from the seller or be prepared to fix it.

Hope that helps

Paul

 

Paul,

From what I have read the AJ16 definately does have OBDII. It is unclear, and from what I have gathered, unlikely that the V12 does have OBDII but I have found no definitive information to confirm this. Therefore, your assessment on another V12 would be very useful.

I will check my connector onto the clock because I think that it is just a power connector, did you have a more comprehensive connector that might send some data as well ?

Lee.

 

The '95 V12 is NOT OBD2 compliant whereas the '95 AJ16 IS OBD2 compliant.
By 1995 the V12 was an obsolete dinosaur and produced by special order only.
The AJ16 was Jaguar's new motor designed and manufactured fully OBd2 compliant in accordance with U.S.
On Board Diagnostics Generation 2 requirement for all 1996 and future cars.

 

I have looked very hard under the LH dash and the RH dash area on my
94 XJS 4.0L 2+2 and I have not located a OBD II type connector.
The only connector I have seen the local Jag service people use is the one in the boot
that is connected to the security module. Definitely not an OBD II connection.

 

scarbro211,

All 4.) litre XJS that were built with the AJ16 engine have OBDII ports. So, any 4.0 litre built after April 1994, VIN 194774 onwards. If it's before that VIN, ie with an AJ6 engine, then it has a Jaguar-specific PDU port in the boot. It's not the security module plug, it just happens to be in the same area.

Roger95,

Very Late 6.0 litre XJS also have an "OBDII" port in the car. The car may not be fully "OBDII-compliant", but they do have the port. I assume, therefore that they don't also have the PDU port in the boot. If so, this "OBDII" port must be the only way that Jaguar can interrogate all the ecu systems. As I said, it may not be fully compliant, but it's an OBDII-shaped port. I'll test my colleagues car this week with a simple smartphone app and see what I can read through the port.

Paul

 

Lee Palmer, My '96 4.0 will work with my mid price code reader but it does not ask for the Vin. I have to enter 'other' after the American makes are asked for. Invaluable tool.
Cheers, RagJag

 

Hi Paul,

Did you have any luck reading your mates 6.0 ?

Cheers, Lee.