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'17 Q50 Premium with Driver Assist package - FORWARD COLLISION ASSIST - FRONT RADAR SENSOR MALFUNCTION WARNING Jump to Latest 21 - 40 of 51 Posts 1 2 3 M

mdanish4

· Registered 2018 Q50 Red Sport 400 RWD Joined Jun 26, 2020 · 96 Posts @Avedis53 do you know the location and part number for the ICC BRAKE SWITCH.. (not the stop lamp switch behind brake pedal)?

Avedis53

· Administrator Newport, OR Joined Sep 16, 2017 · 24,097 Posts On-board display: 86 - C1B56 - Sonar Circuit 4 - C1A04 - ABS/TCS/VDC Circuit 13 - C1A13 - Stop Lamp Relay Fix C1B56 - ADAS control unit detects the rear sonar control unit circuit has a malfunction. Possible cause: Sonar control unit Fail-safe: BCI is canceled. If the rear sonar sensors are all good then the likely suspect is the sonar control unit which is located here (# 21): C1A04 - Malfunction has occurred in the VDC/TCS/ABS system. Possible cause: ABS actuator and electric control unit. Fail-safe: The following systems are canceled: ICC, DCA, FEB, PFCW, LDP, BSW, BCI and ASCD. Most likely suspect is the ABS Actuator and Electric Control Unit. If not that, then the ADAS control unit. ABS Actuator and Electric Control Unit (#10) located in the engine compartment. ADAS Control Unit (#1) located on trunk shelf. C1A13 - Stop lamp inactive state continues for 0.3 sec or more despite the outputting of an ICC sensor ICC brake hold relay drive signal. Or the stop lamp remains ON for 60 sec or more under the following conditions: Driving at 25 mph or more. No stop lamp drive signal output from ADAS control unit. No brake operation. Possible cause: Stop lamp switch circuit Brake pedal position switch circuit ICC brake hold relay circuit Stop lamp switch Brake pedal position switch ICC brake hold relay Incorrect stop lamp switch installation Incorrect brake pedal position switch installation ECM ABS actuator and electric control unit Fail-safe: The following systems are canceled: ICC, DCA, FEB, PFCW, BCI If it were me, I'd spend the money to have your problems diagnosed with a CONSULT by a service tech. It would be very expensive to start replacing control modules or switches without knowing if they are the cause or not. M

mdanish4

· Registered 2018 Q50 Red Sport 400 RWD Joined Jun 26, 2020 · 96 Posts I had updated my #20 post. I cleared all the codes (i think they were from the past) Now the only code i have is 13 which is the stop lamp relay. Do you know where is the ICC BRAKE SW is mounted? E

eljoker

· Registered Joined Mar 18, 2013 · 462 Posts I must of missed it but it looks like you have 30ish k miles and its a 17, still good chance you have bumper to bumper, why not take it to the dealership and have them diag and fix under warranty?

Avedis53

· Administrator Newport, OR Joined Sep 16, 2017 · 24,097 Posts

mdanish4 said: I had updated my #20 post. I cleared all the codes (i think they were from the past) Now the only code i have is 13 which is the stop lamp relay. Do you know where is the ICC BRAKE SW is mounted? Click to expand...

I wish I had seen that before I posted all that other info. I agree with the previous post. You should be covered by warranty unless the car is salvage. It may not be a failed part but rather a short/continuity problem in the wiring harness or connectors.

redsport2019

· Registered Joined Sep 19, 2020 · 60 Posts

mdanish4 said: Please do not bash me for starting a new thread as I was not able find relatable thread.. So all of a sudden now i am getting this malfunction warning for the front sonar\collision prevention this warning only comes when car is on cruise and detects a car in front stopping and tries to brake for the first time because of a car in front, that's when this warning pops up and cruise control disengages. this is happening again and again. Does someone have any clue whats going on or what I should be be looking at? Click to expand...

My car brakes when no objects are around. This is a safety issue. Report this to the NHTSA. It could be a defective module or needs recalibrated. I cant get answers from dealerships as tgey claim i got into a collision lol. This manufacturer screws people to prevent recalls. Look at my otger posts and you might find these other issues on your car. Im filing breach of warranty lawsuit on the manufacturer. M

mdanish4

· Registered 2018 Q50 Red Sport 400 RWD Joined Jun 26, 2020 · 96 Posts

Avedis53 said: I wish I had seen that before I posted all that other info. I agree with the previous post. You should be covered by warranty unless the car is salvage. It may not be a failed part but rather a short/continuity problem in the wiring harness or connectors. Click to expand...

Car had an accident. Driver ran it to road barrier/side rail. The rapair was done at the dealership. Dealership since has voided the warranty hence they will not fix or troubleshoot the problem i am having. As far as the problem, I think I will end up paying the dealership to diagnose the problem however, i am afraid that they will diagnose it wrong. I have checked the ADAS module by swapping with another one with same part number (by the help of a friend) and the problem still exist so at least I now knownita not the expense ADAS module that is causing the problem.

stunt_101

· Registered 2017 Q60 RS Joined Oct 24, 2020 · 85 Posts

mdanish4 said: Car had an accident. Driver ran it to road barrier/side rail. The rapair was done at the dealership. Dealership since has voided the warranty hence they will not fix or troubleshoot the problem i am having. As far as the problem, I think I will end up paying the dealership to diagnose the problem however, i am afraid that they will diagnose it wrong. I have checked the ADAS module by swapping with another one with same part number (by the help of a friend) and the problem still exist so at least I now knownita not the expense ADAS module that is causing the problem. Click to expand...

Did you find out what was wrong with the car after all? M

mdanish4

· Registered 2018 Q50 Red Sport 400 RWD Joined Jun 26, 2020 · 96 Posts

stunt_101 said: Did you find out what was wrong with the car after all? Click to expand...

No sir. Still have the same problem. Haven't had a chance to take it to dealer for diagnosis.

stunt_101

· Registered 2017 Q60 RS Joined Oct 24, 2020 · 85 Posts

mdanish4 said: No sir. Still have the same problem. Haven't had a chance to take it to dealer for diagnosis. Click to expand...

I purchased a Q50 with both of those warnings. Not sure if it has something to do with the accelerator pedal sensor. Info below.

FEB and front sonar issue finally solved

I have a 2018 Red Sport and When I accelerated to get in the freeway my front sonar and started beeping and I got 2 malfunction warnings one for an FEB malfunction and a front parking sensor. It has happened 3 times over the last month and it always would go off after shutting the car off and... www.infinitiq50.org

stunt_101

· Registered 2017 Q60 RS Joined Oct 24, 2020 · 85 Posts

Avedis53 said: I'm not a fan of throwing parts at a car without diagnostics, especially expensive control modules. Without a CONSULT scan tool, it's a guessing game for the most part. You might try this since it doesn't cost anything. The ADAS control unit has an on-board self-diagnosis function that you can engage to see what it might have in the way of DTCs. Start condition of on-board self-diagnosis: Make sure these two systems are turned off. ICC system - OFF DCA system - OFF Vehicle speed - 0 mph 1. Turn the ignition switch off. 2. Now start the engine. 3. Wait 5 seconds after starting the engine. Push the RESUME/ACCELERATE switch UP 5 times and then push the SET/COAST switch DOWN 5 times. Do this operation within 10 seconds. 4. Look at the set vehicle speed indicator on the ICC system display shown on the information display. View attachment 94830 If you see the number "55" flashing as shown above (1), then no DTC was detected. If you see another DTC number and an icon flashing like the second example, then post up a picture of that display. It will display the DTCs for up to 5 minutes and then stop. If multiple malfunctions exist, up to 6 DTCs can be stored in memory at the most and the most recent is displayed first. Click to expand...

Do you have the list of DTC numbers? I will diagnose tomorrow. Thanks! M

mdanish4

· Registered 2018 Q50 Red Sport 400 RWD Joined Jun 26, 2020 · 96 Posts

stunt_101 said: Do you have the list of DTC numbers? I will diagnose tomorrow. Thanks! Click to expand...

Here you go

stunt_101

· Registered 2017 Q60 RS Joined Oct 24, 2020 · 85 Posts

mdanish4 said: Here you go Click to expand...

Thanks, will let you know tomorrow. Otherwise your car drives fine? If you turn off driver assist, do those warnings pop up?

Atsm2123

· Registered Joined Oct 29, 2020 · 10 Posts So I had the same issue but also had abs light come on too. Idon’t know if it will be the same for everyone else but my mechanic found out that my axle was loose. So he pushed it back in and it aligned. After he did that everything went away. M

mdanish4

· Registered 2018 Q50 Red Sport 400 RWD Joined Jun 26, 2020 · 96 Posts

Atsm2123 said: So I had the same issue but also had abs light come on too. Idon’t know if it will be the same for everyone else but my mechanic found out that my axle was loose. So he pushed it back in and it aligned. After he did that everything went away. Click to expand...

Axle was loose? Meaning? And which one front or back? What side? You getting exact same issue? M

mdanish4

· Registered 2018 Q50 Red Sport 400 RWD Joined Jun 26, 2020 · 96 Posts

stunt_101 said: Thanks, will let you know tomorrow. Otherwise your car drives fine? If you turn off driver assist, do those warnings pop up? Click to expand...

Did you read DTC?

DeeCee

· Registered 2016 Hybrid 3.5 SportTech RWD Joined Oct 23, 2017 · 1,860 Posts

mdanish4 said: Axle was loose? Meaning? And which one front or back? What side? You getting exact same issue? Click to expand...

Read the story here! In the end it was the (due to loose axle) misaligned speed sensor causing the problems... M

mdanish4

· Registered 2018 Q50 Red Sport 400 RWD Joined Jun 26, 2020 · 96 Posts

DeeCee said: Read the story here! In the end it was the (due to loose axle) misaligned speed sensor causing the problems... Click to expand...

Weird.. i will check.. i don't get the ABS light though M

mdanish4

· Registered 2018 Q50 Red Sport 400 RWD Joined Jun 26, 2020 · 96 Posts

stunt_101 said: Thanks, will let you know tomorrow. Otherwise your car drives fine? If you turn off driver assist, do those warnings pop up? Click to expand...

did you ever resolve this? J

jd2020

· Registered Joined May 27, 2021 · 1 Posts

mdanish4 said: did you ever resolve this? Click to expand...

Were you able to solve your issue? I am having the exact same one with my Q50 and am hoping I can resolve it without traveling to the dealership 21 - 40 of 51 Posts 1 2 3 Insert Quotes Post Reply

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