X300 won't starts
#1
X300 won't starts
Hi. My X300 Sovereign 1996, 4.0L, won't starts, only if I pull off the minus wire from the battery and let off about 10 or 15 minutes. Then, after this time, I reconnect the minus on the battery and the car starts. At the jaguar dealer authorized car service in Bucharest, Romania, they told me that the security module have an error and it is not possible to delete/reprogamme it. They give to me an advice: to buy an IMMO Off... Another guy told me that isn't exists IMMO off for Jaguar & Ford... I'll apreciate any help...Thanks.
PS: This problem appears after my jag stays without a battery almost 3 years.
PS: This problem appears after my jag stays without a battery almost 3 years.
Last edited by vlaicu; 09-19-2019 at 02:21 PM.
#2
#3
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Lady Penelope (09-19-2019)
#4
#5
Do you have fuel pump relay clicking with your finger on it ?
The fuel pump will stay on for only 4 seconds then off
A 3rd click on is after the Crankshaft position sensor sees engine rotation
This is a safety design
The # 1 fuel pump relay is in this picture
The fuel pump will stay on for only 4 seconds then off
A 3rd click on is after the Crankshaft position sensor sees engine rotation
This is a safety design
The # 1 fuel pump relay is in this picture
Last edited by Lady Penelope; 09-19-2019 at 04:08 PM.
#7
There is a precaution before doing this as the stereo head unit has a security feature in it to prevent it from working if removed from car
The " security code " would have to be reinserted into the stereo
The US models do not have this feature from my understanding
The " security code " would have to be reinserted into the stereo
The US models do not have this feature from my understanding
Last edited by vlaicu; 09-19-2019 at 05:10 PM.
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#8
Immo stands for immobilization which is not a device but a function of the SLCU
Another way to look at it is this enables the starter to work by way of the starter solenoid mounted in the starter motor
This solenoid gets power through the starter relay
The starter relay is mislabeled as solenoid the the 1st pic
The 2nd pic is correct
The starter relay can be swapped with one of the same markings except the needed ECU relay ( RH # 5 )
Another way to look at it is this enables the starter to work by way of the starter solenoid mounted in the starter motor
This solenoid gets power through the starter relay
The starter relay is mislabeled as solenoid the the 1st pic
The 2nd pic is correct
The starter relay can be swapped with one of the same markings except the needed ECU relay ( RH # 5 )
Last edited by Lady Penelope; 09-19-2019 at 04:51 PM.
The following users liked this post:
vlaicu (09-19-2019)
#11
Starting with the stated term from the shop of IMMO off
The immobilizer signal is a enable signal , to not allow a action would be a lack of signal or no signal
In this X300 case the wire between the SLCU and the Body Possessor Module is a digital group of ones and zeros
Unless they had the proper equipment they can't see this signal
For them to say that IMMO off is the issue is a deduction and not fact , in my opinion
The term IMMO off would mean enable and not inhibit ( a reversal term of what my be happening )
Without looking at the video let us break down the starter circuit in parts
The BPM must provide a command ground discrete that goes through the on the transmission rotary switch
This ground path allows the starter relay to close allowing medium power to close the starter solenoid heavy battery cable power contacts for starter motor rotation
On the left side of the BPM are the 3 things that must be satisfied to allow the command ground on the Green / orange wire
Or remove the relay and add power to the 5 socket or white wire
The ignition switch must provide a ground through pin 1 to 5 to car frame ground
The decoder module is the RF transceiver on the key barrel that must agree with the key chip for a digital enable signal to the BPM ( not on USA vehicles )
Then you have the digital enable signal from the SLCU
To bypass this just provide the starter relay a command ground to close
Or you can swap it as it may be intermittent regardless of your battery disconnecting observations
The important observation is if the starter relay clicks 100 % of the time
And even if it does does not indicate if the internal power contacts are defective with burnt contacts not allowing proper current even though it would show voltage
As you are tinkering with the starter and draining the battery the engine ECU needs 11.4 volts for it to properly operate the fuel injectors
So watch the voltage sag on the instrument gauge as the starter can rotate well below this 11.4 volts
The immobilizer signal is a enable signal , to not allow a action would be a lack of signal or no signal
In this X300 case the wire between the SLCU and the Body Possessor Module is a digital group of ones and zeros
Unless they had the proper equipment they can't see this signal
For them to say that IMMO off is the issue is a deduction and not fact , in my opinion
The term IMMO off would mean enable and not inhibit ( a reversal term of what my be happening )
Without looking at the video let us break down the starter circuit in parts
The BPM must provide a command ground discrete that goes through the on the transmission rotary switch
This ground path allows the starter relay to close allowing medium power to close the starter solenoid heavy battery cable power contacts for starter motor rotation
On the left side of the BPM are the 3 things that must be satisfied to allow the command ground on the Green / orange wire
Or remove the relay and add power to the 5 socket or white wire
The ignition switch must provide a ground through pin 1 to 5 to car frame ground
The decoder module is the RF transceiver on the key barrel that must agree with the key chip for a digital enable signal to the BPM ( not on USA vehicles )
Then you have the digital enable signal from the SLCU
To bypass this just provide the starter relay a command ground to close
Or you can swap it as it may be intermittent regardless of your battery disconnecting observations
The important observation is if the starter relay clicks 100 % of the time
And even if it does does not indicate if the internal power contacts are defective with burnt contacts not allowing proper current even though it would show voltage
As you are tinkering with the starter and draining the battery the engine ECU needs 11.4 volts for it to properly operate the fuel injectors
So watch the voltage sag on the instrument gauge as the starter can rotate well below this 11.4 volts
Last edited by Lady Penelope; 09-20-2019 at 12:27 AM.
#12
Starting with the stated term from the shop of IMMO off
The immobilizer signal is a enable signal , to disable would be a lack of signal or no signal
In this X300 case the wire between the SLCU and the Body Possessor Module is a digital group of ones and zeros
Unless they had the proper equipment they can't see this signal
For them to say that IMMO off is the issue is a deduction and not fact , in my opinion
The term IMMO off would mean enable and not inhibit
Without looking at the video let us break down the starter circuit in parts
The BPM must provide a command ground discrete that goes through the on the transmission rotary switch
This ground path allows the starter relay to close allowing medium power to close the starter solenoid heavy battery cable power contacts for starter motor rotation
On the left side of the BPM are the 3 things that must be satisfied to allow the command ground on the Green / orange wire
Or remove the relay and add power to the 5 socket or white wire
The ignition switch must provide a ground through pin 1 to 5 to car frame ground
The decoder module is the transceiver on the key barrel that must agree with the key chip for a digital enable signal
Then you have the digital enable signal from the SLCU
To bypass this just provide the starter relay a command ground to close
Or you can swap it as it may be intermittent regardless of your battery disconnecting observations
The important observation is if the starter relay clicks 100 % of the time
And even if it does does not indicate if the internal power contacts are defective with burnt contacts not allowing proper current even though it would show voltage
As you are tinkering with the starter and draining the battery the engine ECU needs 11.4 volts for it to properly operate the fuel injectors
So watch the voltage sag on the instrument gauge as the starter can rotate well below this 11.4 volts
The immobilizer signal is a enable signal , to disable would be a lack of signal or no signal
In this X300 case the wire between the SLCU and the Body Possessor Module is a digital group of ones and zeros
Unless they had the proper equipment they can't see this signal
For them to say that IMMO off is the issue is a deduction and not fact , in my opinion
The term IMMO off would mean enable and not inhibit
Without looking at the video let us break down the starter circuit in parts
The BPM must provide a command ground discrete that goes through the on the transmission rotary switch
This ground path allows the starter relay to close allowing medium power to close the starter solenoid heavy battery cable power contacts for starter motor rotation
On the left side of the BPM are the 3 things that must be satisfied to allow the command ground on the Green / orange wire
Or remove the relay and add power to the 5 socket or white wire
The ignition switch must provide a ground through pin 1 to 5 to car frame ground
The decoder module is the transceiver on the key barrel that must agree with the key chip for a digital enable signal
Then you have the digital enable signal from the SLCU
To bypass this just provide the starter relay a command ground to close
Or you can swap it as it may be intermittent regardless of your battery disconnecting observations
The important observation is if the starter relay clicks 100 % of the time
And even if it does does not indicate if the internal power contacts are defective with burnt contacts not allowing proper current even though it would show voltage
As you are tinkering with the starter and draining the battery the engine ECU needs 11.4 volts for it to properly operate the fuel injectors
So watch the voltage sag on the instrument gauge as the starter can rotate well below this 11.4 volts
The following users liked this post:
Lady Penelope (09-19-2019)
#14
If I know the security code, this may be useful to starts the engine ? Thank you very much.
Last edited by vlaicu; 09-25-2019 at 01:30 PM.
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