ANY IDEAS????
DTC code P1586
impossible to drive at more than idle speeds.
-------
jaguar starts fine.
3.0 v6 Engine runs OK until accelerate beyond 2100 rpms, then stalls and engine stops.
at stop, immediately starts OK, and then same stall, stop.
impossible to drive at more than idle speeds.
DTC code P1586
------
As background, just prior
car ran fine , but had some roughness at idle rpms, giving seemingly conflicting DTC codes of
P1386 -- Variable cam timing over ADVANCED bank 2
P1388 -- Variable cam timing over RETARDED bank 2
mechanic looked at relays, said "impossible" then cleared codes, and wife left mechanic.

With mechanic gone, on way home she called me to say Jag stype would only go a block or two before stalls and stops.

Please any ideas?
loser mechanic doesn't answer my phone messages.

 

Just possibly it's a failing battery - they cause weird codes and are cheaper than a mechanic.

If you want to read up, P1586 can be found using Search on here and also you can download the free workshop manual.

 

Thanks ..
battery seems fine,
car starts ok .... repeatedly. (20+ times)
Jag s will drive at idle speeds (up to 2000 rpms)
stalls & quits at just above 2000 rpms.

ANY OTHER IDEAS?
(rpm level is from using OBD II reader on "live" mode)

 

DTC details here:

JagRepair.com - Jaguar Repair Information Resource

Having trouble viewing the PDFs at the moment, but that's my tablet acting up.

Some search results showed you're getting a throttle body circuit fault. I'd start by checking the big connector on the front of the throttle body. Make sure it is clean and firmly seated.

I had a similar P1584 on my '02 V6 several years ago. My research at the time pointed towards moisture collecting in the circuit board housing beneath the throttle body. My fix was a guaranteed used throttle body from eBay. $75, piece of cake to change, and the fault has never returned. If P1586 points to an internal throttle body fault, you may want to consider the same route.

 

Have a close look at the wording of P1586 and then look at the workshop manual / elec guide.

Search gets you pointed the same places... (as per post #2)

 

Thanks for all of your help and interest!!.
My jag is Still unchanged..
Engine starts fine, idles fine. Parked, even revs to 3000 rpms in neutral.
When moving and in drive ... engine stops at approx 2100-2200 rpms.
I am lost!!!

A. Replaced Throttle body complete with throttle body control assembly
B. Flushed contact points of Throttle control plug

Engine still cuts off at 2000-2200 rpms.
Any more ideas?

 

Have you got a copy of the workshop manual. Normally it gives a list of checks to go through for codes.
you can get it here in the stickies it is called JTIS.

 

Thanks for help.
No JTIS
I have had been unusucessful in attempting to download JTIS from stickies.. for 2001 Jag S-type

 

if you go here you can download it.
https://www.jaguarforums.com/forum/x...11/#post461216
it is for all years and lots of different models

 

A computer expert (i.e. 10+ yr old kid) may be what you need!

Or spring a few $$$ for the PDF from ebay etc

 

other info....
jag will rev to 3000 at idle...
idle limiter kicks in and holds RPM's to 3000, when in "park".
In "drive" .. engine starts fine, seems ok until slightly above 2000 rpms..
engine quits while rolling, and will not start until car is stopped, and turned off.

Because of code .. I replaced Throttle Body assembly with another from a low-mileage 2004 S-type...and
I get same problem.

Any guidance will be much appreciated..
with JTIS and with "direction" toward a possible solution.
Thanks in advance....

 

https://www.mediafire.com/?3297awvo3atgw#jdp9189p88ie8
is where it is stored. Do you have an old 32 bit computer lying around with Windows Xp or 7.
If so then install it on that then it will run with no problems. If you don't have one then look on ebay.

 

Does your windscreen washer work properly
same relay look at this post.
http://www.jaguarforum.com/showthread.php?t=69622

 

Even if you buy it, it's a LOT cheaper than parts-swapping!

 

If you look at the code it is saying for your car.
P1586 EMS
OBD II
TACM to PCM communication (SCP)
failure
KOEO – page 3, or
KOER – page 3, or
Comprehensive component
monitor engine management
drive cycle – page 7
2 A, M None SCP circuit fault – U Code flagged
TACM Failure

 

Interesting read. However, I don't see any connection whatsoever with the wipers or washer system. The guy who made that association must have got something mixed up.

Relay #4 in the front power distribution box is part of the throttle control system. It would be easy enough (and free) to swap with a relay from another position. Just make sure the donor system is working so the throttle control gets a known-good relay.

 

Note: relay #4 in 2001 S-type is throttle control circuit relay
Not related to wiper system.
some literature and posts are indeed confusing.
thanks for your assistance
as per official Jaguar S-Type 2001 Model Year Electrical Guide
(jaguar publication part number: JJM 10 38 16/10)

 

To all Jaguar mechanics and specialists....
re: throttle body control wiring
Does anyone know if white wire outbound from Throttle Actuator Control Module (TACM) routes directly to PCM or ??
Does white wire travel to another system before arriving at PCM harness plug2?

Believe my problem is in white "W" (Actual Throttle Angle) input to PCM.
White wire gave an odd positive reading .. neither 1 nor 0
All wires tested good for continuity, except white wire.
"W" white wire seems to run from throttle body plug directly to
(located on right firewall)
Tested continuity on all wires between TACM plug (PL44) and Harness plug (PL2) en route to PCM.

as per official Jaguar S-Type 2001 Model Year Electrical Guide
(jaguar publication part number: JJM 10 38 16/10)

 

Did you get the JTIS working as this will tell you how to test the circuit?

 

good idea ... thanks ducmon..
unfortunately I have been unable to successfully download JTIS file.

In absence of JTIS, I have done a continuity check of all cables / wires outbound from TACM module and plug pl44.
In an effort to solve electrical signal fault between TACM and PCM, as indicated by Jaguar DTC manual.

However, I am looking for confirmation that all TACM cable oof wires heads directly to plug 2.
I believe that the white wire (actual throttle plate position) routes directly (along with all other TACM wires) to PL2 plug on firewall (just below the right hood support strut).

In checking continuity of all TACM outbound wires, only my white wire lacks continuity.

If anyone can confirm that white TACM wire does go directly to PL-2?
or does it go somewhere else when being bundled with 40 other wires on backside of V6 engine behind the intake and heads?

I am trying to avoid cutting open all existing cables just to be certain.
Thanks for your interest and help.
LAJAG
los angeles, Calif