Service 4 wheel drive, service electronic brake warning
I have a 2005 Jeep Grand Cherokee with 23000 miles. The info center will beep and start flashing between service 4 wheel drive and service electronic brake. This will continue until the engine is shut down, but will not appear when you restart, only to come on again in a few weeks. Anyone have any ideas??
Re: Service 4 wheel drive, service electronic brake...
This is caused by by a bad ignition switch. According to the dealer the ignition switch contains an antenna that many of the sensors use to communicate with the vehicle, as well as the key fob. When the switch starts going bad the vehicle computer losses communication with these sensors and starts producing codes which include the 4wd and the electronic brakes. My fiance has had the same issues with her Grand Cherokee as well as the key fob not working, the remote start not working, the service engine light comes on, the door chime will sound when the key is NOT in the ignition and the lights are NOT on, as well as numerous codes usually relating to loss of communication with one system or another. All of which are fixed once the ignition switch is replaced. Unfortunately, this usually only fixes the problem for a short time (weeks or maybe a few months) before the piece of junk ignition switch fails again and it all starts over.
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AS LONG AS YOUR CAR IS RUNNING FINE & HAS BEEN SERVICED RECENTLY YOU CAN ALTER THIS MESSAGE ON SCREEN TO STOP THE BEEPING, THE EASIEST WAY IS TO DISCONNECT BOTH THE + & - BATTERY LEADS & CONNECT THEM TOGETHER FOR AT LEAST 30 MINS, THIS WILL RESET THE JEEP'S MEMORY, CONNECT BACK THE LEADS & THEN WHEN YOU GET IN & START YOUR CAR THE DISPLAY BY THE GEARSHIFT WILL BE FLASHING - SET THE CLOCK BY KEEPING YOUR FINGER ON THE SET BUTTON FOR S FEW SECONDS UNTIL THE IST DIGIT BEGINS TO FLASH, THEN PRESS THE SET BUTTON UNTIL YOU REACH THE DESIRED HOUR, THEN PRESS THE SELECT BUTTON BELOW & THIS WILL MOVE YOU ON TO THE MINUTES, CONTINUE WITH THE ABOVE OPERATION UNTIL THE TIME & DATE HAVE BEEN SET, YOUR "SERVICE" SHOULD NOW BE RESET TO EITHER 7500 MILES OR 12500 MILES, I SERVICE MY 96 GRAND CHEROKEE MYSELF SO THIS IS MY "CHEAT" FOR THE SYSTEM & IT IS GUARANTEED TO WORK. BEST OF LUCK.
I have the same vehicle, with the same issue. I had put the car on a rack and lifted it to pin point the cause of the clunk when shifting from park to reverse or reverse to drive. I found that the front diff mounts were grenaded, meaning they needed to be replace bad. with these mounts being bad it was causing the front diff housing to slam the frame up and down when shifting from park or reverse to drive. this is pretty expensive to fix, your talking $160 in parts and $540 in labor. I also had the service 4WD warning display on my dash cluster, i had the code read. It came up as a bad solenoid in the rear diff. this is about $200 parts and labor to fix. Also, dont know how many miles are on your jeep but if you've ever sub-merged your axles under water or if your over 60,000 miles you need to replace your gear oil in the front diff, rear diff and transfer case. This is a little costly to have a mechanic do as well because you're supposed to use synthetic gear oil. For a shop to do it you're looking at $360.
The service 4 wheel drive light comes on because there's a problem. The biggest causes of this I've seen are a software glitch in the final drive control module which the dealer can fix by reprogramming and the other is usually the electric actuator on the front axle housing. The only light that comes on by a timer is the one that says, "perform service" in your overhead console or odometer.