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The keypad which has new batreries will not unlocks the

Customer Question
The keypad which has...

The keypad which has new batreries will not unlocks the doors or turn off the immobilizer to be able to start the car

Mechanic's Assistant: Have you checked the battery, particularly the terminal connections? Are they corroded?

They are all fine, new car battery also. Car starts but shuts off because cannot deactivate the immobilizer

Mechanic's Assistant: What is the model/year of your Jeep?

1996 grand jeep cheroke

Mechanic's Assistant: Are you fixing your Cherokee yourself? What have you tried so far?

New battery in key remote but it still doesn't work

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

That's all there is

Submitted: 2 months ago.Category: Australia Car
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Answered in 11 minutes by:
12/19/2017
AU Auto Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 2 months ago
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Australia Car
Satisfied Customers: 4,807
Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic Vehicles
Verified

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

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AU Auto Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 2 months ago

Hey how are you,I will try to help you with this issue

Have you tried a master reset after installing new battery ,if the anti theft system seen a low or no voltage condition it will trigger on or if locks not working, door switches, hood ,trunk etc , to many parts to guess at it

Master reset Procedure

1- Disconnect Battery Cables ( Negative & Positive Cables )you can use any electrical wire as an extension if battery cables don't reach .the reason we do that is to take any residual power in the wiring harness to try to reset the modules ,and there will be no spark created touching them since we took battery power source out of the loop by taking both cables off

2- Hold cables Together for 60 secs ,then let go

3- Wait 30 minutes

4- Make sure all doors are closed

5- Reconnect battery Cables

6- Lock & unlock the vehicles using the key from driver door side (if you have a key fob with no blade key, just lock & unlock using the key fob buttons)

7- Enter the vehicle and attempt to start

if that does not work ,You will need a factory scanner or equivalent to run a diagnostic scan & retrieve fault codes from the Vehicle modules and based on these fault codes we can pull up a Pin Point troubleshoot
and be accurate on it ,If you do get it scanned ,you can post the fault code back here for me and I can help you further on it and be more accurate .

You are very welcome :)

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Customer reply replied 2 months ago
The battery was replaced approximately 2 months ago so that is mot the issue. Vehicle has started multiple times daily since then. Have tried your disconnect the battery, hold leads together and wait option this has not worked. I have 2 keyless entry fobs, both with new batteries and neither of them will either unlock any doors or deactivate the immobilizer. Obviously a much more technical issue is the problem. I was hoping for a quick fix to deactivate the immobilizer so I can get the vehicle home or to a service center.
AU Auto Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 2 months ago

I understand You will need a factory scanner or equivalent to run a diagnostic scan & retrieve fault codes from the Vehicle modules and based on these fault codes we can pull up a Pin Point troubleshoot
and be accurate on it ,If you do get it scanned ,you can post the fault code back here for me and I can help you further on it and be more accurate .

i m sorry or it will be a guess and we end up throwing parts at it

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Chad Farhat
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Australia Car
Satisfied Customers: 4,807
4,807 Satisfied Customers
Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic Vehicles

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