Hello to all,

help please, I have to align the codes of my jaguar XJ6 3.2 sport 1996, key-body-engine-immobiliser control units, I have also a code error P1621 on my diagnostic pc
please what kind of diagnostic software have I to use. Is someone available to recode it if I send all the controls units?

 

Are we talking about the chip in key not allowing starter rotation ?

To know you have all starter enables including Immobilier ( summed up by the Body Processor Unit ) the large starter solenoid relay must click by feel , this splits starter rotation issues in half

You will have to put your finger on relay as other relays in area will click at same time or you can notice a large voltage sag on the instrument cluster on successful relay closing

For the 3.2 liter engine / transmission combination you will not have a transmission mounted rotary position switch like the more common 4.0 on this website

Code on page 121 - 131

801S TITLE

I do not have chip in key immobilization for North American Spec X300 models do not , but others have experience as the engine CEL light sequence in starting

Was the car in storage for a while as the security ( SLCM ) must have the fuse installed as the chip in key feeds that SLCM as a starter enable , may have been pulled to silence the alarm as battery drains

fuse # 4 in the trunk

See page 23

X300 1996 LWB.pdf

This is your chip in key ( labeled column switchgear coil ) on page 207 ROW ( rest of world ) and your whole starter circuit for the 3.2 setup on page 48

jagrepair.com/images/AutoRepairPhotos/jagxj1996.pdf

 

Thank for the answer
Unfortunately the problem is the code of the key that not permitted the start ignition, the relè has not click when i switch the key
i suppose that the key has not the right code.
possible to restore or recode the key?
Giordano

 

P1621 means error sensor position of the crankshaft
I suppose is an effect, not a cause, of the missing start input

 

The most stress free method would be to send your module to xjrengineer in the UK who can remove the immobiliser option altogether.
I am not sure what he charges for this, but the only other way is to find someone with the very old jaguar computer IDS software and they are few and far between.

Send him an email andystodart4@gmail.com

and see what he says.

 

Cafcpete's point is immobilization is common and a hard one so Andy can blank this in the engine ECU

The CKPS sensor has nothing to do with starter rotation but comes into effect in later whole engine starting sequence as the starter is already rotating

A good CKPS will read 1300 ohms as a basic meter reading

There are 2 fuses for the starter solenoid relay # 12 / 10 amp right engine bay fuse box ( relay control , clicking ) and # 3 / 25 amp left engine bay fuse box as this is the muscle power passing through relay spinning the starter motor

The immobilizer decoder module in the dash must be powered from a trunk fuse by the troublesome large BT - 4 connector above the fuel tank , it should have a tie wrap on it to hold lock over bar closed , do not remove connector yet

 

The starter solenoid relay can be in the wrong position and a other large # 5 right ECU controlled relay will click as it should always , this other relay should not keep the starter from rotating but does not allow the fuel injector to open ( down the road starting sequence )

 

To get the starter solenoid relay to close you can provide a small wire ground to the Green / Orange color wire as the relay is in sockets , you can swap this large relay from a headlight , fog , or A / C clutch relay of the same part #

LNA6706AA item # 1

Xj 1995 - 1997 (from 720125 To 812255) (x300) Classic / Relays | Jaguar Land Rover Classic Parts

The engine valve cover is not a good ground

socket 3 and 5 is the muscle power passing through

# 1 is command to close ground provided by the BPM

# 2 is fuse # 12 right engine bay fuse box

You must also have the relay in the corner of the right engine bay fuse box click closed to power the engine ECU for starter rotation enable ( starter solenoid relay to click ) , this small relay can also be swapped with the left engine bay fuse box corner relay as this only runs the car horns

 

Above post corrected as right engine bay fuse box in last paragraph

 

Thanks Parker 7
how about the Body unit control, has it managed by a immobilised code or it has managed only about a family unit item
i have a doubt that it is the really problem, the lock doors doesn’t work

 

The body processor module sums up all your enables for starter rotation and then providing a ground to close the starter solenoid relay

The for the 3.2 enables are ignition key position ( start ) , Transmission position , ECU enable , SLCM

the BPM also gets it's power from the trunk fuse # 5 / 10 amp trunk fuse box passing through the BT - 4 connector

See page 48

jagxj1996.pdf

Your power pin at the BPM is FC3 - 1 ( Brown / Black ( N / B ) wire ) in the corner , this pin will be hot at all times

See page 25 of the wiring guide , this wiring guide pic is a little mixed up on Jaguar's side pic , Jaguar's pic will be the BPM unit side of the connector

The BPM can be slid down by removing the black button by a common interior Christmas tree removal tool or a flat blade screwdriver / butter knife to get under there







You can see voltage but not the current to funtion fully going back to the BT - 4 connector making little contact

When removing the BPM from behind the glove compartment keep very careful track of your hardware , use a piece of cardboard with holes punched in it method otherwise it can be confusing , ask me how I know

 

I bought a new BPM, cross my finger... i hope it will be in good working. Fuses are ok

 

Finishing up previous post , had to run off to dialysis , nurses don't like when I'm late

 

thanks to much for all Parker, God Luck

 

Time for a nap , pizza does that to me , when at the leaning tower of piza at the eating place the only meat pizza they had was a single chopped up hot dog

Fun time driving around Italy and absorbing the culture , many trips ( American Airlines jet doctor so free ) and memories

What does Mia Mia Della Machia mean as a someone' s loud car wreck heard while sleeping at San Remo hotel ?

The town of Delebio was totally awsome when staying overnight there going into Switzerland through the small roads to snow ski

 

I am happy to hear that you have good memories of Italy, and I am shocked to hear about hot dog meat on a pizza!
That is pretty crazy…
I am from the northeast of Italy so I am not familiar with the places that you mentioned - I hope you can return to help me with the Jaguar- I can’t find a competent mechanic unfortunately.
Take care of yourself and thank you very much for all your help.

 

The single sliced up hot dog on a whole pizza was to keep American tourist happy otherwise vegetable pizzas which is your norm

I drove east on SS38 northeast Italy road through Sondrio but not to east coast

Use to fly into Milan and travel by car to the west and south

 

My email address is giordano.michelacci@gmail.com
You can contact me the next time you are here if you want.
Have a great day