Hello Don, can I use that for s-type 3.0 v6, I have the same problem, p1224 and p1229

 

Hi Vilen,

Welcome to the Jaguar Forums. It's great to have you with us.

You don't mention the model year of your S-Type, but you may be able to find the closest applicable DTC Summaries manual at this link:

JagRepair.com - Jaguar Repair Information Resource

If you can't find it, let us know the model year of your car and I'll see what I have in my library.

Cheers,

Don

 

I have the Jag S-type 2003 with 3.0 v6

 

Hi Vilen,

These definitions and possible causes are from the 2004 X350 DTC Summaries manual, but should apply to your car:





Remember that the problem can be on the ECM end also - check the electrical connectors at the TB and ECM and clean them regardless of how they look. Disconnect the battery before disconnecting either the TB or ECM.

Also, please visit the New Member Area - Intro a MUST and post an introduction so we can learn something about you and your Jaguar and give you a proper welcome.

Cheers,

Don

 

Thank you for the answer, Don! I already checked electrical connectors and replaced the relay, fuses didn't blow, I replaced TP sensor, and checked the throttle, it opens and closes once when I move the key clockwise

 

The Workshop Manual contains "Pinpoint Tests" you can follow to test for problems like short or open circuits in the wiring, ground faults, etc. Ground faults are very common on Jaguars, so I would personally start by checking the ground points referenced by the ECM.

All of the ground circuits given in the DTC possible causes, PI-004, PI-005 and PI-054, terminate at the body ground point P140AL, which is behind the right front wheel arch liner on Left Hand Drive cars, and behind the left front wheel arch liner on Right Hand Drive cars. You can locate ground points with the diagram on pdf page 24 of the manual at the link below and on the Component and Connector listings on the pages prior to each wiring schematic.

Jaguar S-Type Electrical Guide 2003

Check the ground point for corrosion by removing the nut, detaching the eyelet terminals and washers, cleaning them all with a small brass-bristle brush and zero-residue electronic contact cleaner (I use the CRC brand), allowing to dry, then reassembling. Don't overtighten the nut and risk damaging the stud. The nut just needs to be well snugged.

You can download the Workshop Manual at this link:

Jaguar S-Type Workshop Manual 2002.5 On

Also, it might be worth having a look at this thread in case it could be helpful:

Throttle Range Calibration After Battery Disconnection

Cheers,

Don

 

What I did:

• disconnected ECM
• PINPOINT TEST E : THROTTLE CONTROL POSITION ERROR: P1224 Both wires have a small resistance within normal limits.
• Disconnected the ground wires and cleaned them.
• Put all back, andtried throttle calibration.

Thethrottle motor wires have a short when the ECU is connected, is it normal?

 

So when you connect the ECM, you measure low-resistance continuity between the throttle motor wires? I don't know if that is normal, but the pinpoint tests may give a resistance specification when measuring at the throttle motor connector with the ECM connected. Just take care not to short the ECM.

 

It showed a short circuit between the throttle motor wires for a second with ECM connected.
Could you explain, what kind of pinpoint test you are talking about? I couldn't find a test with ECM connected. I found only "PINPOINT TEST E : THROTTLE CONTROL POSITION ERROR: P1224" for the throttle

 

I don't know for certain that the manual tells you what the resistance should be when measured from the throttle motor connector with the ECM connected, but if you look through the various tests related to the throttle motor, you may find it. Have you followed the pinpoint tests all the way to the point where you are told to replace the throttle motor or replace the ECM?

Cheers,

Don

 

That document is huge, probably I missed something. I found only pinpoint test E, related to either P1224 or P1229 errors, and that test is after information related to V8. This test is straightforward: check wires resistance, and if it's good - replace the ECM

 

Hi Vilen,

I have moved the posts associated with your S-Type from the X308 forum to start your own thread in the S-Type forum.

It seems like there should be a measure of the resistance from the throttle body connector in the tests before condemning the ECM. The throttle motor drive circuit would presumably have some resistance, or possibly infinite resistance.

Are you measuring the resistance between the Red/White and Green/White wires at the throttle motor connector? Have you checked to see if either of those wires is shorted to ground or is open between the throttle motor and ECM connectors?

Cheers,

Don

 

I measured (Red/White and Green/White) with:
- the throttle motor disconnected - wires were shorted to ground for less than 1 second.
- the throttle motor and ECM disconnected - wires weren't shorted, resistance less than 1 ohm both wires

Where can I find information about throttle valve right position and open/shut right speed? I suspect there is a problem with either the spring or the valve or the throttle motor.

 

I checked red\white and green\white wires , and they have minimal resistance
I checked everything I could, read many threads here, and bought a new 198500-3300 Denso—nothing changed. Who can I ask?

 

I meant to ask about this statement earlier. What do you mean you tested the R/W and G/W wires with the throttle motor disconnected and the wires were shorted to ground for less than 1 second? After they measured short to ground, what happened? Did the resistance change to infinite? Can you more completely describe how your meter was connected during these tests?

Cheers,

Don