windguy Posted March 2, 2022 Share Posted March 2, 2022 (edited) PROBLEM OVERVIEW My 2015 Cargo XLT has the factory optional front/rear parking sensors and backup camera. New problem that just cropped up with the Parking Aid Module (PAM) and I need help in trying to diagnose and perhaps fix this, if I have the skills. My fear is that if I bring the van into the dealer they will say I need an entire new parking sensor system (8 sensors, module, sounder). That could be very costly. When the van is in gear, the Parking Switch is illuminated as "OFF" constantly. Can't enable or turn on. Didn't realize the parking sensors weren't chiming, both front and rear. It's been working great for the last seven years. First time there's been an issue. The backup camera works just fine. I scoured this forum and the web looking for similar problems and found some discussions in forums with the same problem reported, but no resolution. Videos on youtube were helpful in diagnosing the problem using FORScan and also how to test and replace the sensors if those were faulty. I included links to the videos at the bottom of the post just as a reference in case someone else needs it in the future. Kind of a WIKI for the PAM. WHAT I'VE DONE SO FAR First step was to look for a fuse. Problem is I don't have a rear cargo fuse panel so I have no idea what fuse number it would be in the engine compartment. Sucks that's not identified in the user's manual. Only if you have the rear cargo fuse panel, F30 - Parking Aid. I don't think it's the fuse because I can hear the sensors clicking. Second step was to check the sensors. The front and rear sensors seem to be working with an audible clicking sound, for the most part. A little inconsistent in the intensity but I can detect the clicking from all of them. Third step was to connect FORScan. Below is a screen shot with the error code after running a test on the PAM. I cleared the DTC's and the same error code for the PAM came back. DTC: B1B52:14-2B Not sure what the 14-2B suffix is but the B1B52 pops up on a web search, highlighted below. No indication there is a fault with any of the sensors. --------------------------------------------------------------------------------------------------------------- https://www.engine-codes.com/b1b52_ford.html B1B52 – Rear Sounder-Park Aid Circuit Short B1B52 Possible Symptoms Engine Light ON (or Service Engine Soon Warning Light) B1B52 Possible Causes Faulty Rear Parking Aid Speaker, Rear Parking Aid Speaker harness is open or shorted, Rear Parking Aid Speaker circuit poor electrical connection, Faulty Parking Assist Control Module (PAM) B1B52 Description The Parking Assist Control Module (PAM) monitors the Rear Sounder-Park Aid Circuit Short. A continuous memory and on-demand Diagnostic Trouble Code (DTC) that sets Sets when the sounder circuit is shorted to voltage or Sets when the sounder circuit is open or shorted to ground. ---------------------------------------------------------------------------------------------------------------------- NEED HELP The SOUNDER appears to be the SPEAKER. If the speaker is the source of the problem and needs to be replaced, I have no idea where it's located. Can't search by sound since it's off. Perhaps someone else with a cargo van can figure that out for me. One video on youtube shows how to replace the speaker, which was mounted on the headliner. Quite involved process to drop the headliner just to get to that part. Greatly appreciate any help with how to diagnose or figure out how to fix this problem. THANKS GUYS! FORSCAN SCREEN SHOT PARKING AID MODULE PIC YOUTUBE LINKS ON REPAIR TIPS HOW TO DIAGNOSE PAM WITH FORSCAN https://www.youtube.com/watch?v=1PL146G01dk HOW TO DIAGNOSE PAM https://www.youtube.com/watch?v=zzcIKq550Jg Transit Custom Parking sensor fault how to fix replace rear sounder speaker beeper remove headlining https://www.youtube.com/watch?v=q8c4WwGefiQ Edited March 3, 2022 by windguy Quote Link to comment Share on other sites More sharing options...
Don Ridley Posted March 2, 2022 Share Posted March 2, 2022 (edited) Here is the wiring diagram for the PAM. Disconnect the connectors and test the resistance of both speakers. I don't know the exact value but they both should be the same (I'm guessing around 8 ohm). This should help diagnose if the speakers are bad. Next step would be to test the sensors somehow. Replacing the module should be straight forward. You can buy a used one from a junkyard. I don't know if they need to be programmed but I doubt it. I don't have a PAM so I can't check my configuration. You can look at the PAM as-built data with Forscan and an extended license. I'm sure this can be fixed without having to go to a dealership. PAM wiring diagram.pdf Edited March 2, 2022 by Don Ridley windguy 1 Quote Link to comment Share on other sites More sharing options...
windguy Posted March 3, 2022 Author Share Posted March 3, 2022 (edited) @Don R - many thanks Don. The tips and wiring diagram will be very useful. I see the fuse number now, F37 in the Battery J-box. Will start there to be sure. Based on the diagram, there are two speakers, front and rear. I guess that's how you get a different tone for front and rear sensors. Seems odd both speakers would cut out at the same time unless if one goes then the whole PAM shuts down. I would agree that the PAM should be an easy replacement without any programming. I'm now betting my money on that being the suspect. Will report back. Thanks again!!! PAM Module Info from FORScan. Part Number DT1T-15K866-DE Edited March 3, 2022 by windguy Quote Link to comment Share on other sites More sharing options...
Don Ridley Posted March 3, 2022 Share Posted March 3, 2022 There should be PIDs for each parking sensor. Maybe start by checking them. The sensor status should change when it senses an object within range. windguy 1 Quote Link to comment Share on other sites More sharing options...
windguy Posted March 3, 2022 Author Share Posted March 3, 2022 13 hours ago, Don Ridley said: There should be PIDs for each parking sensor. Maybe start by checking them. The sensor status should change when it senses an object within range. Thanks Don. That's a great idea. I didn't even know what a PID is (Performance Information Data) but I found a youtube video showing how to check using FORScan, linked below. I think I can handle doing that. https://www.youtube.com/watch?v=othzIGwDtiE UPDATES: 1 - I checked F37 (5a - tan) in the engine compartment and it's okay. 2 - I then removed the three connectors going into the PAM so I can check the sounder resistance. Tried to figure out where the sounder pins are. A bit difficult since there is a shell around the connector so you can't easily see what color wire goes into what pin #. Didn't want to risk removing the connector from the shell and messing it up. I'm sure it's easy to do if you know how to do it. I need to go back to the wiring diagram directly rather than using my notes. Also need to find a better wire to stick in the connector to check with the multi-meter. It was a case of too thick or too thin. I hope to do better on my second attempt. Quote Link to comment Share on other sites More sharing options...
windguy Posted March 7, 2022 Author Share Posted March 7, 2022 UPDATES: 1 - Checking speaker resistance I was able to check both front and rear speaker resistance: front - short between pins 3 & 4 (Connector B) rear - open between pins 2 & 10 (Connector A) In case this helps the next guy, below pics show the position of Connectors C9071A, B, C on the PAM. Also where on the schematic the connector designation is shown. I used individual wires from scrap Cat5 cable, which seemed to fit nicely into the connectors to check the resistance. I'm sure there's better options but it worked. Thanks again to Don R for providing that schematic. 2 - Checking PAM PID (Performance Information Data) using FORScan Setting up a PID table using the video link posted above was straightforward and pretty slick. Shown below are two screen shots taken while testing. Great suggestion by Don R. for checking this out. FORScan is such a great tool. Bummed to read Don R's post about the licensing hiccups with the Russia war going on. All eight front and rear sensors appear to be working. The value changes from 3m to 1m when the sensor is activated. Not sure what the m stands for. Front - The status for the TONE and SENSOR change from inactive to active when the sensor is triggered. Seems okay. Rear - The REAR TONE STATUS doesn't change to active when the sensor is triggered. That may show the speaker doesn't work as indicated by the DTC posted earlier. Based on this testing, I'm changing my bet to the REAR SPEAKER being the problem and not the PAM. Any other thoughts on what to do next? I think it's time to scope out this rear speaker. The question is where is it located?? Any help in locating that would be appreciated. I sure hope it's easily accessible but I'm expecting that's probably not the case. Thanks for the help guys! LOCATION OF CONNECTOR ID ON SCHEMATIC - A, B or C CONNECTOR ID ON PAM (A-left, B-center, C-right) FORSCAN - CHECKING PAM PID PARAMETERS - WITH IGNITION ON BUT ENGINE OFF FORSCAN - CHECKING PAM PID PARAMETERS - WITH ENGINE ON Condition - Left Rear Outer Sensor triggered (1m) and Front Sensor triggered but value change not showing "1m" during the screen grab. Value toggles from 3 to 1 pretty quickly even though the FRONT TONE STATUS is still showing ACTIVE. Slight lag on that. REAR TONE STATUS always Inactive. Quote Link to comment Share on other sites More sharing options...
Don Ridley Posted March 7, 2022 Share Posted March 7, 2022 The rear speaker is in the headliner unfortunately. The front speaker is behind the triangular "door" on the side of the dashboard next to the headlight switch. I think your troubleshooting clearly shows the speaker is bad. At least the speaker is under $20. parking speaker.pdf windguy 1 Quote Link to comment Share on other sites More sharing options...
windguy Posted March 8, 2022 Author Share Posted March 8, 2022 Thanks Don for the quick reply, info, and PDF. Very helpful. Does your manual also show how to lower the headliner on a cargo model? A PDF of that would be most helpful to guide me. One saving grace, besides the low speaker cost, is that the speaker is mounted in the rear of the headliner, so perhaps I can access without removing the headliner, just lowering that left rear corner. Hopefully I can do this without any collateral damage, which I'm sadly very good at doing. Thanks again for the help. Most appreciated! Quote Link to comment Share on other sites More sharing options...
Don Ridley Posted March 8, 2022 Share Posted March 8, 2022 The manual has instructions on removing the headliner but I would try to loosen the headliner around the speaker and carefully pull it down for access. Let me know if this doesn't work and I will find the headliner removal instructions. windguy 1 Quote Link to comment Share on other sites More sharing options...
windguy Posted March 8, 2022 Author Share Posted March 8, 2022 Thanks Don. Will follow those tips. I did a little exploration and believe I can see the speaker about where the diagram showed it should be in the left rear corner. You can see some of the adhesive used to tack it down ran a bit over the edge of the headliner. Speaker is black. A bit hard to capture a pic while but visually it's a bit clearer since you can angle your sight just right. Will provide an update when available. Thanks again! Don Ridley 1 Quote Link to comment Share on other sites More sharing options...
windguy Posted March 20, 2022 Author Share Posted March 20, 2022 UPDATE Replaced the Rear Speaker and the whole parking aid system (front and rear sensors and speakers) works now. Problem solved. Thanks again Don R. for your guidance. Always appreciated. I'm sharing some repair details below in case someone else has this problem and needs some help. PART INFO FORD PART NUMBER: 3W8Z-15K864-A MFG PART NUMBER: 3W83-15K864-AA LIST PRICE = $22.22 (local dealer parts dept offered 10% off list = $20.00 + tax) Part not stocked locally. Ships from central Ford parts distribution in Memphis. Took two days for delivery to dealer for pickup. There is only one part number for the speakers (qty 2) so the assumption is that the front speaker is the same part number, but not confirmed. NEW SPEAKER ORIGINAL SPEAKER REMOVAL OF OLD SPEAKER AND INSTALL OF NEW 1 - I removed two of the four fasteners at the rear of the headliner in order to drop the headliner enough in the left rear corner to rear the rear speaker. The fasteners are pretty long, about two inches. I first used interior trim tools to lever it down a bit and then grabbed the fasteners using gloves to twist and pull it out. They popped back in easily when reinstalling. 2 - I again used the trim tools to loosen the speaker, which is glued to the headliner. Luckily, there is enough of the cable coiled around the speaker to bring the speaker down and make it accessible. Thanks Ford engineers. Without that service loop is would have been far more difficult to access the speaker. Removed the old speaker and installed the new speaker, tested parking aid system, then applied double sided tape on the bottom of the speaker to tack it down to the headliner and buttoned up headliner for completion. Don Ridley and KDiehl 2 Quote Link to comment Share on other sites More sharing options...
kookmyers Posted June 24, 2022 Share Posted June 24, 2022 (edited) This is an awesome thread. Thank you all for all the information! I have a ‘14 titanium with the same problem condition. I went around the vehicle to listen for the clicking and think they are all working (the dB level was different at each sensor but present nonetheless). I intend on accessing the PAM to measure the speakers. is the speaker in the same place on the fully headlined passenger version? I have the moonroof also… I do not have Forscan as I don’t have a laptop that would make using it easy. Edited June 24, 2022 by kookmyers Quote Link to comment Share on other sites More sharing options...
kookmyers Posted June 24, 2022 Share Posted June 24, 2022 I just went to look at my headliner, and getting to that speaker is going to be rough. I am really hoping it’s the front speaker! Quote Link to comment Share on other sites More sharing options...
windguy Posted June 24, 2022 Author Share Posted June 24, 2022 @kookmyersSorry to hear you're having this problem. It sounds (or lack of) that your speakers are the problem. Checking the resistance may help you determine if it is the speaker and which one. Seems like the rear speaker would be in the same location regardless of cargo or wagon model. It's more an issue of having the audible near the driver and having some separation between the two speakers. Maybe another wagon model owner with parking aides can pinpoint the sound of the rear speaker for you. That would be helpful. Yes, dropping the headliner on a wagon model would be a pain but I know some forumites have done it. For some, tasks like that are easy peasy but for me it would be a nervous challenge. Is the headliner divided into a few sections rather than one continuous piece? Maybe it's not so bad dropping or prying down one section. Plastic removal tools are in expensive and good to have for something like this. Regarding Forscan, maybe you can borrow someone's laptop. It's really helpful to troubleshoot and check error codes having Forscan. Maybe the mobile app might work in a pinch. You would need an Bluetooth OBDI reader. Keep us posted. Good luck! Quote Link to comment Share on other sites More sharing options...
Don Ridley Posted June 24, 2022 Share Posted June 24, 2022 2 hours ago, windguy said: @kookmyers Seems like the rear speaker would be in the same location regardless of cargo or wagon model. The manual shows the speaker location does not change with different models or configuration. 2 hours ago, windguy said: Maybe the mobile app might work in a pinch. You would need an Bluetooth OBDI reader. The Forscan mobile app will show all error codes and you can read all data points (PIDs). You just can't make any configuration or programming changes. windguy 1 Quote Link to comment Share on other sites More sharing options...
windguy Posted June 25, 2022 Author Share Posted June 25, 2022 @Don Ridley- thanks Don, good to know. Quote Link to comment Share on other sites More sharing options...
kookmyers Posted June 27, 2022 Share Posted June 27, 2022 (edited) I confirmed today that my rear speaker is reading as an open circuit while my front speaker is about 50 ohms. Thank you again for the pictures and diagrams! I plan to order a speaker and then dig into the headliner. edit: I placed the order but I won’t be able to get to it for a few weeks as I am going on vacation. Will be several weeks before I report back. Edited June 27, 2022 by kookmyers windguy 1 Quote Link to comment Share on other sites More sharing options...
kookmyers Posted August 9, 2022 Share Posted August 9, 2022 I received my rear sensor speaker today. Shoutout to Brandon Apell at Gaudin Auto Parts. USPS lost my first package and Brandon hooked me up with a second shipment. It appears my issue is fixed with a quick garage test. I have valuable information to share. I have mentioned I have a ‘14 titanium. It has the panoramic roof. I was taking apart the van to try and lower the headliner to get to the speaker above the left shoulder of the driver. I was finally able to remove the interior light in the headliner and by reaching my hand through the hole directly to the left (while facing forward) I was able to find the speaker, peel it off the headliner and barely pull it through the hole to access the cable disconnect. HEADLINER REMOVAL IS NOT NECESSARY ON THE ‘14 TITANIUM WITH PANORAMIC ROOF. thank you again everyone! notes: pulled the old speaker. 0 ohms new speaker marked 50 ohms (I forgot to measure it!) windguy 1 Quote Link to comment Share on other sites More sharing options...
KDiehl Posted November 19, 2022 Share Posted November 19, 2022 I have the B1B52 Error in Forscan on my 2016 Transit 350 XLT. I think I need to replace the rear sounder/speaker, but wanted to check the resistance at the PAM. Anyone know where the Parking Aid Module is on a 2016 Transit 350 XLT or what online resource I would need to locate it? Quote Link to comment Share on other sites More sharing options...
windguy Posted November 19, 2022 Author Share Posted November 19, 2022 16 minutes ago, KDiehl said: I have the B1B52 Error in Forscan on my 2016 Transit 350 XLT. I think I need to replace the rear sounder/speaker, but wanted to check the resistance at the PAM. Anyone know where the Parking Aid Module is on a 2016 Transit 350 XLT or what online resource I would need to locate it? This forum is for the Transit Connect, not the full size Transit. Try posting your question on the Transit Forum. Forum link below (there may be others). Also check youtube for repair videos. Best of luck! https://www.fordtransitusaforum.com/forums/#us-ford-transit-forums.72 Quote Link to comment Share on other sites More sharing options...
Pateszi Posted January 8 Share Posted January 8 Tudna valaki abban segíteni hogy Ford turneo connect 2014-es, pontosan hol van a tolatóradarnak a hangjelzője? Előre is köszönöm a segítséget! Quote Link to comment Share on other sites More sharing options...
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