by Bob Beranek

A friend recently ran into an issue with a fully loaded 2014 Grand Cherokee with a rain sensor. He reported that after the new windshield was installed, the wiper swiped once every time the vehicle was started, and that when it rained the wiper did not change frequency and/or speed. His team had worked on several of these vehicles in the past and did not have a similar incident.

They took the vehicle to the dealer, where the dealer checked several on-lot vehicles and found that none of them had the same issue. The dealer contacted Chrysler Technical Services and discovered that the system needed resetting.

My friend told me by email, “In the scan tool there was an option asking if the RS had been removed or replaced. (By the way: I don’t think our auto glass tech unplugged it, rather he un-clipped it from the bracket on the windshield and left it hang.)  When ‘yes’ was selected the scan tool the system began resetting door locks, electro mirror, adaptive cruise and many other functions, including the ‘rain sensing windshield.’ After that was complete, the wipers performed normally.”

The charge for this service is about $50 to $75 per reset. The reset covers similarly-equipped vehicles from 2013 and up.

The unclear point in this story is that others have not had a similar problem when the glass was replaced. The tech in this case did not disconnect the rain sensor so interruption of the electrical circuit is not the cause.

My theory is that any Chrysler vehicle with multiple Advanced Driver Assist Systems (ADAS) included in its features, requires this reset/recalibration. I think that all ADAS circuits are interrelated and need rebooting. I would be interested to hear from those that have had a similar experience and how they handled it.

I recently got a call from one my clients saying that they were doing a new 2014 Jeep Cherokee Trail Hawk which had a lane departure camera mounted on a bracket attached to the glass. As I had suggested in a previous post, they called their local Jeep dealer to schedule a calibration. The neighborhood service department knew nothing about calibration of the system. My client didn’t know what to do. So, thanks to some new information my friend Mitch Becker gave me, I suggested that they call a local Goodyear Auto Center and see if they could calibrate it for them. In the meantime, I decided to research this with my friends at Chrysler to find out if it needed to be calibrated or not.

Here is my research concerning the Chrysler lane departure system. I contacted my friends at Chrysler and they were kind enough to send me the information I was looking for. First of all, let me list the vehicles we are talking about:

—2014 Dodge Durango & Jeep Cherokee (DW2030-31); and

—2014 Grand Cherokee (DW2054-59).

As some of you know, Chrysler just added the lane departure feature in 2014 so I suspect that many dealers are as yet unaware of the calibration required. I suggest that you contact your local dealer and inform them about this feature, what it requires and where to look for the procedure. It so happens that the procedure is in their service manuals under:

—08-Electrical, 8E-Electrical Modules, MODULE, Forward Facing Camera/Installation

It wouldn’t be a bad idea to find out what they would charge for the calibration while you’re there as well.

Below are two pages from the Chrysler’s TECHAuthorityII.

TECHAuthorityII is an online service where visitors can pay to view all of the service manuals for Chrysler vehicles. There is a charge for the subscription, but in some cases, it may be well worth the cost.