rover 75 key

lesron · 5th May 2018, 17:02

Found my estate car keys wedged between worktop and tumble dryer for the last 4 days
Now the light comes on when fob is pressed but doesn't unlock car , can't unlock car with just key it just turns left and right in lock
would the vibration of damaged the electronics
many thanks

stevestrat · 5th May 2018, 17:37

Even though the light comes on I'd try another battery. One of the buttons may have been pressed while it was stuck there and although there's enough power for the light may not be producing a strong enough signal. Should still work in the door lock though, doesn't need anything electronic for that.

lesron · 5th May 2018, 20:17

Many thanks
i did however try a battery out of my 75 saloon and it didn't work
must be something a miss with the door mechanism as it rotates but doesn't unlock
will try a new battery avain tomorrow
Last time i used it with the dogs and now wonder if they pressed the hazard button and i didn't notice and thats drained the car battery

genpk · 6th May 2018, 11:28

Not sure about the effects of the dryer but i have had a key that appeared to be working fine when buttons were pressed but i could never get it to work on the car no natter how many times i coded it to the car.
Appears the key had “lost” its ability to generate its frequency so it can happen.

Den · 6th May 2018, 11:52

Quote:

Originally Posted by lesron

Found my estate car keys wedged between worktop and tumble dryer for the last 4 days
Now the light comes on when fob is pressed but doesn't unlock car , can't unlock car with just key it just turns left and right in lock
would the vibration of damaged the electronics
many thanks

When you opened the key did a small dark grey brick drop out of the half shell without the buttons? I think this is the transponder (i could be wrong). If it's still there it's the battery. The keys are solid state except for the PCB buttons. Hope this helps.

lesron · 6th May 2018, 12:15

Cheers yes the little brick is in the fob , now wonder if the dogs had pressed the hazard switch when they jumped out and the batery is flat or worse that the ecu is flooded with all the heavy rain we had , use my saloon every day but not the estate that often

stevestrat · 6th May 2018, 12:17

The transponder has nothing to do with the central locking. All it does is speak to the immobiliser and allow the car to be started.

lesron · 6th May 2018, 12:26

How do i ded in touch with a moderator to get info on opening the bonet
cheers
ps just renewed membership so can recive private message

genpk · 6th May 2018, 12:43

As mentioned, its the circut board in the key is tge thing that generates the locking etc .
The small transponder chip in the key allows the ignition system to operate.

stevestrat · 6th May 2018, 12:50

Quote:

Originally Posted by lesron

How do i ded in touch with a moderator to get info on opening the bonet
cheers
ps just renewed membership so can recive private message

The info about opening the bonnet is available in the Subscribers General Forum, you can access it as you are now a subscriber.

5th May 2018, 17:02	#1
lesron Avid contributor rover 75 saloon and tourer Join Date: Jul 2015 Location: Hythe Posts: 162 Thanks: 31 Thanked 9 Times in 9 Posts	rover 75 key Found my estate car keys wedged between worktop and tumble dryer for the last 4 days Now the light comes on when fob is pressed but doesn't unlock car , can't unlock car with just key it just turns left and right in lock would the vibration of damaged the electronics many thanks

5th May 2018, 17:37	#2
stevestrat This is my second home ZT260 #243 (resting) Join Date: May 2010 Location: Prestonpans Posts: 22,484 Thanks: 650 Thanked 4,624 Times in 3,358 Posts	Even though the light comes on I'd try another battery. One of the buttons may have been pressed while it was stuck there and although there's enough power for the light may not be producing a strong enough signal. Should still work in the door lock though, doesn't need anything electronic for that. __________________ Steve T4 Location Map

6th May 2018, 12:17	#7
stevestrat This is my second home ZT260 #243 (resting) Join Date: May 2010 Location: Prestonpans Posts: 22,484 Thanks: 650 Thanked 4,624 Times in 3,358 Posts	The transponder has nothing to do with the central locking. All it does is speak to the immobiliser and allow the car to be started. __________________ Steve T4 Location Map

5th May 2018, 20:17	#3
lesron Avid contributor rover 75 saloon and tourer Join Date: Jul 2015 Location: Hythe Posts: 162 Thanks: 31 Thanked 9 Times in 9 Posts	Many thanks i did however try a battery out of my 75 saloon and it didn't work must be something a miss with the door mechanism as it rotates but doesn't unlock will try a new battery avain tomorrow Last time i used it with the dogs and now wonder if they pressed the hazard button and i didn't notice and thats drained the car battery

6th May 2018, 11:28	#4
genpk Posted a thing or two Rover 75 Saloon MGZT Join Date: Jul 2012 Location: Perth, AUSTRALIA Posts: 1,664 Thanks: 3 Thanked 461 Times in 299 Posts	Not sure about the effects of the dryer but i have had a key that appeared to be working fine when buttons were pressed but i could never get it to work on the car no natter how many times i coded it to the car. Appears the key had “lost” its ability to generate its frequency so it can happen.

6th May 2018, 12:15	#6
lesron Avid contributor rover 75 saloon and tourer Join Date: Jul 2015 Location: Hythe Posts: 162 Thanks: 31 Thanked 9 Times in 9 Posts	Cheers yes the little brick is in the fob , now wonder if the dogs had pressed the hazard switch when they jumped out and the batery is flat or worse that the ecu is flooded with all the heavy rain we had , use my saloon every day but not the estate that often

6th May 2018, 12:26	#8
lesron Avid contributor rover 75 saloon and tourer Join Date: Jul 2015 Location: Hythe Posts: 162 Thanks: 31 Thanked 9 Times in 9 Posts	How do i ded in touch with a moderator to get info on opening the bonet cheers ps just renewed membership so can recive private message

6th May 2018, 12:43	#9
genpk Posted a thing or two Rover 75 Saloon MGZT Join Date: Jul 2012 Location: Perth, AUSTRALIA Posts: 1,664 Thanks: 3 Thanked 461 Times in 299 Posts	As mentioned, its the circut board in the key is tge thing that generates the locking etc . The small transponder chip in the key allows the ignition system to operate.