Hello all

I am driving jaguar x-type 2.5 Petrol (LPG) automatic.
And i am having the following problem the gas pedal of the car is loosing sensitivity there are times when the car is very speedy and times when the sensitivity of the gas pedal disappear most of the times is when the car is on LPG.
Its like i am pressing the gas pedal and and nothing happens and if something happen like the gearbox shifting down there is absolutely no acceleration !
The LPG guys are always telling that everything is fine.
I have replaced the throttle body a couple of times one time with second hand one time with new one.
Also i have cleaned some of the sensors the issue stays, there is no check lamp to indicate any issue i don't know where to look anymore please help !
If someone who is familiar with the model can tell me which modules to check and maybe how it will be really great. There is a big possibility that i have already done that but i am open for new ideas !

 

Could be the accelerator sensor. Check procedure =

Jaguar X-Type (X400) V6-3.0L
Test B: Accelerator Pedal Demand Sensor
Vehicle ALL Diagnostic Trouble Codes ( DTC ) Testing and Inspection P Code Charts P1215 Test B: Accelerator Pedal Demand Sensor
TEST B: ACCELERATOR PEDAL DEMAND SENSOR
B : DTC P1122, P1123, P1215, P1216, P1344

B1 : CHECK THE ACCELERATOR PEDAL DEMAND SENSOR OUTPUT

1. Turn the ignition switch to the RUN position.
2. Measure the voltage between electrical connector PA1-6 and ground with the accelerator pedal released and with the accelerator pedal at full throttle.
3. Measure the voltage between electrical connector PA1-3 and ground with the accelerator pedal released and with the accelerator pedal at full throttle.

Does the voltage vary between 0.3 volts and 5 volts?
Yes
Goto B4

No
Goto B2

B2 : CARRY OUT AN ACCELERATOR PEDAL POSITION SENSOR COMPONENT CHECK

1. Remove the accelerator pedal.
2. Measure the resistance between pin 1 and pin 6 of the accelerator pedal.
3. Measure the resistance between pin 2 and pin 3 of the accelerator pedal.

Is the resistance between pin 1 and pin 6 between 546 and 1134 ohms, and between pin 2 and pin 3 between 975 and 2025 ohms?
Yes
Goto B3

No
INSTALL a new accelerator pedal. For additional information, refer to. CLEAR the DTC. TEST the system for normal operation.

B3 : CHECK THE ACCELERATOR PEDAL DEMAND SENSOR CIRCUIT FOR A SHORT TO GROUND

1. Disconnect the PCM electrical connector EN16.
2. Measure the resistance between electrical connector PA1-6 and ground.
3. Measure the resistance between electrical connector PA1-3 and ground.

Is the resistance greater than 10,000 ohms?
Yes
Goto B4

No
REPAIR the accelerator pedal demand sensor circuit from the PCM to the accelerator pedal. CLEAR the DTC. TEST the system for normal operation.

B4 : CHECK THE ACCELERATOR PEDAL DEMAND SENSOR CIRCUIT FOR OPEN CIRCUIT

1. Disconnect the PCM electrical connector EN16 and the accelerator pedal electrical connector PA1.
2. Measure the resistance between EN16-103 and PA1-6.
3. Measure the resistance between EN16-102 and PA1-3.

Is the resistance less than 5 ohms?
Yes
DIAGNOSE the electronic engine control system.

No
REPAIR the accelerator pedal demand sensor circuit from the PCM to the accelerator pedal. CLEAR the DTC. TEST the system for normal operation.

 

Hello Dell,

BIG Thank you for the detailed reply!
I am currently trying to follow it, i am having some issues with finding the correct diagram and pin to measure the resistance between EN16-103 and PA1-6.
The PIN

diagram i am finding is not matching.

 

? EN16-103 is the 4th hole from the right, not the 5th one you circled.

 

Hello,

Yes you are correct but the next one on the left should be 102 the one i have put red circle on and it is missing and also when i try to measure the resistance on 103 it is showing 0
Also when you looked the other wholes, on the left for example or right they are just not the same as the diagram, correct me if i am wrong i am not very technical
I didn't manage to find different electrical scheme

 

Page 31

https://www.google.com/url?sa=t&sour...GpaYYHOX0XPK_w

Full electrical diagram

https://redirect.viglink.com/?format...%2520Guide.pdf

 

Hello

They are the same as the one i found.. (
I dont know why but the pins i have are in different places compare to the diagram as can you see on the picture i posted

Big thank you again

 

Is the picture you posted of the TCM module or the loom plug?
If you are you looking at the pin out of the ECM, then holding up the plug and viewing it the same way you will confuse yourself?
Remember the diagram is the ECM receiving plug not the loom plug which will in fact logically be a mirror image....you might need to reverse your thinking on the pin outs if you are looking a the plug not the TCM.

 

Hello Mark,

Thank you for the great tip !