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ABS / DCM Issues

5.2K views 4 replies 2 participants last post by  AlphaScout1  
If the 2019 Frontier is the same as the 2018, according to the FSM, it's located inside the passenger compartment underneath the driverside dashboard to the left of the steering column. To access it you have to remove the knee panel cover just below the steering column. Looking at the FSM drawing, the Differential Lock Control Unit, (as it's referred to in the FSM), is mounted somewhat high up to a metal bracket - that metal bracket being attached to the vehicle metal frame bracing on the left side underneath the dash.

This is the closest I could find of a picture of it references a Nissan Parts webpage... but it only covers the 05-12 model years....
nissan Frontier Control Unit Differential Lock. Controller Transfer - 28496-EA31A | NISSAN, RICHMOND VA

Have you checked for an open / shorted wire(s) running to the back / rear differential solenoid lock valve?? A search of the Web didn't pull up much info on this code....

Anyhow, hope it helps.... Good Luck!!
 
Not sure if you have access to a Factory Service Manual, but you can download a copy from the websites below. Yeah....it's NOT the 2018 model year, (the closest is 2016), but hopefully if Nissan hasn't changed too much in the design, then the info in the 2016 should work for the 2018.

If you want 2018 specific, then you can access the AllData website - it's the one professional mechanics use in their repair shops but it's the D-I-Y version. A month's subscription will run you $19.99 but you can download and access as much info as you want in that time frame. The AllData access is a hella lot cheaper than if you purchase the FSM CD from Nissan. Nissan's FSM CD will set you back $200+ dollars and is a pain in the *** to use.... Nissan in their infinite wisedom linked it to Microsoft Internet Explorer with ActiveX controls, (FYI Internet Explored is no longer supported by Microsoft - they upgraded to Edge). You can get it to run in Microsoft Edge but you have to change the browser setting in Edge to run in Internet Explorer Legacy Mode.... It's a shame Nissan couldn't keep the FSM in the same format as the 1st Gen FSM CD's. Those were much easier to use than these new 2nd Gen FSM CD's. Anyhow, here's the link for AllData

Forgive the stupid question, but HOW did you get the right rear brake caliper to explode?? Oh wait...never mind....it's NOT as rare as I thought.. Someone else, (Ford forum), blew theirs up too!!

Anyhow, according to my '19 FSM the rear differential solenoid lock valve is actually located on the upper portion of the rear differential on the driver side. Any possibility that when the caliper exploded that a piece of shrapnel cut or nicked one of the signal wires running to the differntial solenoid? If it did, lets just hope it's easy to spot & fix. Running diagnostics on signal wires is a MAJOR pain-in-the-a**!!! Let's just hope it's something simple to repair & you DON"T have to trace wires & test solenoid(s) to find the cause of your C1187 code. Good Luck!!🤞🤞🤞
 
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