Not Starting after Clearing Adaptations/Adaptions with GAP IID BT
Winching
Joined: Dec 2018
Posts: 571
Likes: 165
Ignition Fails to Operate
Check that the key is correctly inserted into the start control unit (SCU) and that it is the correct key for the vehicle (Key
will be ejected from the SCU if it is not programmed or from another vehicle). If the vehicle is an automatic, ensure that
the Park position is selected and if manual, ensure it is in the Neutral position.
Check that the start button circuit to the Central Junction Box (CJB) is not open circuit or short to ground.
Check that the CAN network is not malfunctioning, i.e. open circuit or short circuit. This would mean that the CJB, ECM and
Instrument Cluster would be unable to communicate. Check these modules for related DTCs and refer to relevant DTC
Index.
Engine Fails to Crank
The immobilizer status indication LED is displayed in the bottom left of the instrument pack. When the key is inserted into
the SCU, the LED will be turned on for 3 seconds and then turned off. The LED will flash slowly (once every 2 seconds) if
the vehicle is immobilised (transponder not approved). Additionally the diagnostic system should be used to check for
Diagnostic Trouble Codes (DTCs) from the CJB, instrument cluster, ECM and the ABS module.
One potential occurrence for the vehicle failing to crank on an Automatic Transmission could be due to the Locked in park
switch.
Check the Crank request circuit from the CJB to ECM for short circuit or open circuit.
Check the Starter Relay Circuit.
Check that the Steering Column Lock (SCL) is operating correctly. Inserting the key should drive the SCL to un-lock and
steering wheel should move freely.
Check the CAN network is not malfunctioning, i.e. the CAN circuit is open or short circuit. This would mean that the CJB,
instrument cluster, ECM or ABS module would not be able to communicate resulting in no challenge being made from the
modules for the Immobilisation data.
Also on an Automatic, check the CAN network between the CJB and the Transmission Control Module (TCM). The CJB uses
the "LockedInP" signal transmitted by the TCM to determine if the transmission is in Park before allowing crank, the CJB
uses a value of 0x01, if the CJB sees a value less than this it will not allow crank, and key will not be ejected from SCU.
For a manual gearbox the clutch pedal has to be de-pressed, hence check the CAN network between the CJB and the ECM
to ensure the clutch is depressed, ClutchPedalSwitch75pct = TRUE and ClutchPedalPressed2 = True. The Vehicle will not
crank until these signals are set.
On an Automatic vehicle, check the CAN network between the ABS module and the CJB. The CJB uses a signal
"BrakePedalActive" to determine if the brake pedal has been depressed in order to allow the engine to crank. The CJB uses
a value = TRUE if the CJB does not receive this signal, it will not allow the crank request output.
Check that the key is correctly inserted into the start control unit (SCU) and that it is the correct key for the vehicle (Key
will be ejected from the SCU if it is not programmed or from another vehicle). If the vehicle is an automatic, ensure that
the Park position is selected and if manual, ensure it is in the Neutral position.
Check that the start button circuit to the Central Junction Box (CJB) is not open circuit or short to ground.
Check that the CAN network is not malfunctioning, i.e. open circuit or short circuit. This would mean that the CJB, ECM and
Instrument Cluster would be unable to communicate. Check these modules for related DTCs and refer to relevant DTC
Index.
Engine Fails to Crank
The immobilizer status indication LED is displayed in the bottom left of the instrument pack. When the key is inserted into
the SCU, the LED will be turned on for 3 seconds and then turned off. The LED will flash slowly (once every 2 seconds) if
the vehicle is immobilised (transponder not approved). Additionally the diagnostic system should be used to check for
Diagnostic Trouble Codes (DTCs) from the CJB, instrument cluster, ECM and the ABS module.
One potential occurrence for the vehicle failing to crank on an Automatic Transmission could be due to the Locked in park
switch.
Check the Crank request circuit from the CJB to ECM for short circuit or open circuit.
Check the Starter Relay Circuit.
Check that the Steering Column Lock (SCL) is operating correctly. Inserting the key should drive the SCL to un-lock and
steering wheel should move freely.
Check the CAN network is not malfunctioning, i.e. the CAN circuit is open or short circuit. This would mean that the CJB,
instrument cluster, ECM or ABS module would not be able to communicate resulting in no challenge being made from the
modules for the Immobilisation data.
Also on an Automatic, check the CAN network between the CJB and the Transmission Control Module (TCM). The CJB uses
the "LockedInP" signal transmitted by the TCM to determine if the transmission is in Park before allowing crank, the CJB
uses a value of 0x01, if the CJB sees a value less than this it will not allow crank, and key will not be ejected from SCU.
For a manual gearbox the clutch pedal has to be de-pressed, hence check the CAN network between the CJB and the ECM
to ensure the clutch is depressed, ClutchPedalSwitch75pct = TRUE and ClutchPedalPressed2 = True. The Vehicle will not
crank until these signals are set.
On an Automatic vehicle, check the CAN network between the ABS module and the CJB. The CJB uses a signal
"BrakePedalActive" to determine if the brake pedal has been depressed in order to allow the engine to crank. The CJB uses
a value = TRUE if the CJB does not receive this signal, it will not allow the crank request output.
https://www.freel2.com/forum/topic35...ht=immobilizer
LR2 is the FL2.........
Thread Starter
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Drifting
Joined: Nov 2020
Posts: 32
Likes: 6
That's a long thread. But for around $20 for a steering lock simulator, unless it damages something, it is worth trying before taking it to a mechanic, or worse, the dealer.
EDIT: I also found this video:
. If this works, it might help me get it going immediately and it would also isolate the problem. Hopefully the "initialize Steering Wheel Lock" in the GAP tool functions will code in a new steering wheel lock if I get around to replacing it.
EDIT 2: The video linked above does not identify the year of FL/LR2. But my 2012 is very different underneath the steering column.
EDIT: I also found this video:
EDIT 2: The video linked above does not identify the year of FL/LR2. But my 2012 is very different underneath the steering column.
Last edited by BlairMaynard; Apr 5, 2021 at 03:21 PM. Reason: adding video link, noting year of FL/LR2 not mentioned in video
TReK
Joined: Jan 2020
Posts: 2,149
Likes: 631
From: Massachusetts
I have one of those sitting on my desk but thankfully I've had no reason to try it.
Thread Starter
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Drifting
Joined: Nov 2020
Posts: 32
Likes: 6
So I got my baby back today from the Land Rover shop. They found that the BCM was not Communicating with the PCM.
They reprogrammed the BCM (requiring a new key to be cut since I only got one with the car) and it started up.
My lean state hasn't come back, but it usually takes a few days of driving to come back after resetting faults anyway.
I am pretty sure the resetting of adaptions on my car that caused the glitch.
Of course I have no idea whether it was the GAP tool or maybe the car computer already had a glitch in it. But it was running fine for 6 months with the lean state and I was clearing faults only with the GAP tool, then I cleaned the MAF sensor and, for the first time, reset adaptions.
I would advise avoiding resetting adaptions with the GAP tool on a 2012 L359, if you can. The vehicles usually recover the new settings on their own anyway.
If you do reset adpations with the GAP tool on a 2012 L359, please post your results to this forum.
They reprogrammed the BCM (requiring a new key to be cut since I only got one with the car) and it started up.
My lean state hasn't come back, but it usually takes a few days of driving to come back after resetting faults anyway.
I am pretty sure the resetting of adaptions on my car that caused the glitch.
Of course I have no idea whether it was the GAP tool or maybe the car computer already had a glitch in it. But it was running fine for 6 months with the lean state and I was clearing faults only with the GAP tool, then I cleaned the MAF sensor and, for the first time, reset adaptions.
I would advise avoiding resetting adaptions with the GAP tool on a 2012 L359, if you can. The vehicles usually recover the new settings on their own anyway.
If you do reset adpations with the GAP tool on a 2012 L359, please post your results to this forum.
Recovery Vehicle
Joined: Apr 2019
Posts: 957
Likes: 214
From: Ottawa, Canada
fwiw, For your particular use case, I merely disconnect the battery and touch the cables. A “hard” reset is accomplished and once connected up she adapts perfectly, though of course some electrical resets need be completed.
I do this every couple of years to the LR and the Jag. It keeps them behaving as they should.
I do this every couple of years to the LR and the Jag. It keeps them behaving as they should.
Recovery Vehicle
Joined: Jul 2012
Posts: 828
Likes: 349
From: San Diego
Those key fobs can only ever be programmed to a vehicle one time, when new. If something on the car changes to not recognize it, it cannot be reprogrammed.
You can save some coin with an aftermarket key and an Autel AP200 to program it. I did this successfully recently, $30 for the new key and $60 for the AP200... next time I'll just have to buy the key (vice $400 at JLR). The AP200 software is wonky though, it will probably tell you that it failed to program they key, but it probably actually did work so try they key and keep trying until it works. The software works fine for reading & clearing codes and some other car programming.
Thread Starter
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Drifting
Joined: Nov 2020
Posts: 32
Likes: 6
I only got one fob when I bought it. So they had to order a new fob and program it, adding about $350 to the total bill.
You might be able to reprogram/flash the BCU with your GAP tool, I don't know and after the clearing adaptions fiasco I really didnt trust it anymore to do that.
Recovery Vehicle
Joined: Apr 2019
Posts: 957
Likes: 214
From: Ottawa, Canada
Guys... this is sounding more and more like an unsupported ODBII device was connected and you arbitrarily cleared EVERYTHING.
I wouldn't be doing that. To "reset" the vehicle just disconnect the battery... I think you did this to yourselves...
I wouldn't be doing that. To "reset" the vehicle just disconnect the battery... I think you did this to yourselves...
