Land Rover will not start
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1st Gear
Joined: Feb 2020
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Land Rover will not start
My 2010 Land Rover LR2 will not start. I live in colorado with a lot of cold weather and know that rovers don’t always handle cold weather well. Anyways, I’ve had the alternator and battery replaced and regrounded the starter. Still nothing, no clicking or even turning over. Could the keys be dead? Thanks!
TReK
Joined: Jan 2020
Posts: 2,149
Likes: 631
From: Massachusetts
From the service manual...
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 unlock 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.
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 unlock 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.
Rock Crawling
Joined: Dec 2015
Posts: 450
Likes: 336
From the service manual...
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 unlock 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.
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 unlock 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.
However it would be very helpful if you collected a little more baseline information
If I were in your position I would do the following
Confirm that you can get the ignition on and put the transmission in Neutral before you start the engine
To do this
1 dock the key but don’t touch the brake
2 press the start button for 2 seconds but don’t touch the brake
3 radio should turn on, instrument panel should turn on
4 press the brake and move from park to Neutral (Note: the vehicle needs to be on level ground or it might roll down hill when you select neutral)
5 press the brake and press the start button
Is the result the same for starting in Neutral as it is for starting in Park?
Good Luck
Paul
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