ABS fault codes in Scan Tool but no ABS lights on - Infiniti Q50 Forum
User Tag List

 6Likes
Reply
 
LinkBack Thread Tools Search this Thread
post #1 of 22 (permalink) Old 09-10-2019, 08:41 PM Thread Starter
Junior Member
 
Join Date: Feb 2019
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
 
Default ABS fault codes in Scan Tool but no ABS lights on

Whats up everyone, was hoping to seek some insight on a couple of codes my cheap obd2 scanner are finding. See them below. They sound semi important but whats strange is I would think there would be a ABS light on for this one. All signs point to ABS and brakes. I wonder if these modules were unplugged at one time when the ignition was turned on perhaps? I have the option to clear the codes in my scanner but they don't go away. As far as fuses go I did check the driver side fuse panel (No ABS fuses in there) Also checked the big fusable link box and nothing I see associated with ABS in there as well.

Looking for some advice on this one.


Here were the codes.

C1140-00 - Fault in ABS Actuator/ Relay


U1000-01:

The trouble code U1000 is a vehicle specific code primarily found on Chevrolet, GMC and Nissan vehicles. It refers to a "Class 2 communications failure." Generally, this code will precede an additional code that identifies the module or area of the failure. The second code may be generic or vehicle specific.

Read more at: https://www.obd-codes.com/u1000
Copyright OBD-Codes.com
T00fast is offline  
Sponsored Links
Advertisement
 
post #2 of 22 (permalink) Old 09-11-2019, 11:34 AM
Q50 Addict
 
BigHeadClan's Avatar
 
Join Date: Mar 2017
Location: Cal, AB
Posts: 3,491
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1442 Post(s)
 
Garage
Default

First it really helps if you let us know what model of Q50 you have, there is 2 generations of car and there is typically
seperate ABS systems for RWD and AWD cars so it's important to give us your basic information. Hah

Look at the SM a U1000-01 code it appears to be a generic communication error, if your able
to clear the Code on your scan tool do so and see if it comes back.

If not you'll need to bring the car in and have the connections inspected and or possibly the Control Module replaced.
I don't recommend you attempt replacement yourself as it appears to require a CONSULT tool and a backup/export of your configurations
before the old unit it removed.
Attached Thumbnails
Click image for larger version

Name:	Diangostics.PNG
Views:	12
Size:	60.6 KB
ID:	85787  

2009 G37 X - Blue Slate - Michelin X-Ice 3/ Michelin AS/3+ Location: The Great White North

Planned Mods: Takeda Stage II Intakes, Borla Catback Exhaust,
G-Stop SS brake lines, Megan Racing Upper Strut-Tower.

“Passion rules reason, for better or for worse.” - Terry Goodkind
BigHeadClan is online now  
post #3 of 22 (permalink) Old 09-11-2019, 11:40 AM Thread Starter
Junior Member
 
Join Date: Feb 2019
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
 
Default

2014 AWD S. Dang, where is the module at least? I could verify plugs are all connected. What is the CONSULT? Some sort of dealer tool?

2014 Q50s AWD | HFC | Stillen Axle Back
T00fast is offline  
Sponsored Links
Advertisement
 
post #4 of 22 (permalink) Old 09-11-2019, 01:56 PM
Q50 Addict
 
Avedis53's Avatar
 
Join Date: Sep 2017
Location: Newport, Oregon
Posts: 4,550
Mentioned: 58 Post(s)
Tagged: 0 Thread(s)
Quoted: 2128 Post(s)
 
Default

Quote:
Originally Posted by BigHeadClan View Post
First it really helps if you let us know what model of Q50 you have, there is 2 generations of car and there is typically
seperate ABS systems for RWD and AWD cars so it's important to give us your basic information. Hah

Look at the SM a U1000-01 code it appears to be a generic communication error, if your able
to clear the Code on your scan tool do so and see if it comes back.

If not you'll need to bring the car in and have the connections inspected and or possibly the Control Module replaced.
I don't recommend you attempt replacement yourself as it appears to require a CONSULT tool and a backup/export of your configurations
before the old unit it removed.
Definitely would help if the OP as well as everyone else here put relevant car information in their signature (year, model, options, mods) in order for us to assist in answering questions.

It doesn't appear to me that there are separate ABS systems for RWD and AWD. The FSM shows only one for both.

The C1140 DTC is indicating there is/was a malfunction detected in the actuator relay in the ABS actuator and electric control unit. That DTC can be classified as PAST or CRNT. This is determined with a CONSULT scan tool. If after running the DTC confirmation procedure, the CONSULT displays PAST, then the DTC is cleared and no further action is necessary as it was a temporary problem. If CRNT is displayed then the problem still exists and could be due to:

Faulty or loose harness or connector
ABS actuator and electric control unit
ABS actuator and electric control unit power supply system
Fuse
Fusible link
Battery

There are fusible links for the ABS actuator and electric control unit in the Fuse and Fusible Link Box. They are: Fusible Link "L" 30A and Fusible Link "N" 50A. I don't think that's the problem though and I doubt it's the battery either. See diagram below:



If the fusible links are ok, then the ABS actuator and electric control unit's power supply and ground circuit need to be checked as well as the pin terminals on the harness connectors. If there's no problem there then it's likely the ABS actuator and electric control unit needs to be replaced.

Don't muck around with the ABS system. This is not shadetree mechanic work and brake control system maintenance should be left to qualified mechanics. It requires a CONSULT scan tool that the service department uses for diagnostic purposes. You can inspect the connectors for something obvious but I doubt you'll find anything. The ABS actuator and electric control unit is located on the right next to the brake fluid reservoir and master cylinder. See diagram below (#12):



The U1000 DTC indicates that that there was a communication interruption in the CAN gateway of greater than 2 seconds. This could have been temporary or it is indicating a reoccurring communication problem in the CAN highway if it doesn't clear with an ignition cycle. Again, a CONSULT scan tool is necessary to properly diagnose the problem.
BigHeadClan likes this.

2018 Q50 RS 400 AWD - Graphite Shadow - Sensory Package (Sport) - ProACTIVE Package - Continental DWS 06 A/S tires - BMS JB4 w/BT Rev.3 Connect Kit - FI CBE w/resonated X-pipe - Z1 Motorsports 2-Piece brake rotors - Infiniti Motorsports street pads - Stillen rear anti-sway bar - Mishimoto OCC - XPEL Ultimate Protective Paint Film - Color-matched rear spoiler - PrecisionLED light kit - Tuxmats - StrongArm trunk lifts - Escort 360c radar detector w/Blendmount & MirrorTap - Vantrue N2 Pro dashcam
Avedis53 is online now  
post #5 of 22 (permalink) Old 09-11-2019, 03:50 PM
Q50 Addict
 
BigHeadClan's Avatar
 
Join Date: Mar 2017
Location: Cal, AB
Posts: 3,491
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1442 Post(s)
 
Garage
Default

Quote:
Originally Posted by T00fast View Post
2014 AWD S. Dang, where is the module at least? I could verify plugs are all connected. What is the CONSULT? Some sort of dealer tool?
As per Avedis notes below the location appears to be below the Brake Reservoir, CONSULT is a dealer level scan tool that provides a staggering amount of
control over a car as well as the ability to monitor and report on nearly every sensor.

This is definitely work for a certified technician so just visually confirm that the cables are seated correctly, please don't disconnect anything.
Your model is a 2014 so as long as you're mileage isn't very high you should be covered under warranty on the car.

Quote:
Originally Posted by Avedis53 View Post
Definitely would help if the OP as well as everyone else here put relevant car information in their signature (year, model, options, mods) in order for us to assist in answering questions.

It doesn't appear to me that there are separate ABS systems for RWD and AWD. The FSM shows only one for both.
I'll double check the SM later , it was a chart covering the various components and differences based on trim levels I admittedly was just passing through
that section however.

2009 G37 X - Blue Slate - Michelin X-Ice 3/ Michelin AS/3+ Location: The Great White North

Planned Mods: Takeda Stage II Intakes, Borla Catback Exhaust,
G-Stop SS brake lines, Megan Racing Upper Strut-Tower.

“Passion rules reason, for better or for worse.” - Terry Goodkind
BigHeadClan is online now  
post #6 of 22 (permalink) Old 09-12-2019, 11:45 AM Thread Starter
Junior Member
 
Join Date: Feb 2019
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
 
Default

Thanks everyone, after reading all this and referring to the SM I'm hoping there was just a past ABS issue and the codes are stored and my cheap scan tool just can't clear them or decipher CRNT or PAST. Learned a few new things too!
T00fast is offline  
post #7 of 22 (permalink) Old 09-12-2019, 11:50 AM
Q50 Addict
 
BigHeadClan's Avatar
 
Join Date: Mar 2017
Location: Cal, AB
Posts: 3,491
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1442 Post(s)
 
Garage
Default

Quote:
Originally Posted by T00fast View Post
Thanks everyone, after reading all this and referring to the SM I'm hoping there was just a past ABS issue and the codes are stored and my cheap scan tool just can't clear them or decipher CRNT or PAST. Learned a few new things too!
No problem sir, your local car shop can loan you a decent scan tool that is able to clear the codes and for free usually. Scotty Kilmer actually just did a video on this topic with a G37, I think his content
is pretty hit or miss but this was one of his better pieces of content.

https://youtu.be/PwfYcr-j27k?t=110

2009 G37 X - Blue Slate - Michelin X-Ice 3/ Michelin AS/3+ Location: The Great White North

Planned Mods: Takeda Stage II Intakes, Borla Catback Exhaust,
G-Stop SS brake lines, Megan Racing Upper Strut-Tower.

“Passion rules reason, for better or for worse.” - Terry Goodkind
BigHeadClan is online now  
post #8 of 22 (permalink) Old 09-12-2019, 03:20 PM
Q50 Addict
 
JohnInNH's Avatar
 
Join Date: Apr 2018
Location: SW New Hampshire, USA
Posts: 3,193
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1336 Post(s)
 
Garage
Default

Quote:
Originally Posted by Avedis53 View Post
Definitely would help if the OP as well as everyone else here put relevant car information in their signature (year, model, options, mods) in order for us to assist in answering questions.
^^^^^^ THIS ^^^^^

And still not updated by the OP.

2018 AWD Q50 RS, Graphite Shadow, NO DAS, 255/40ZR19, Pilot Sport 4S, Stillen rear Anti-sway Bar on stiffest, AMS HE, Fast Intentions high flo cats, resonated X-pipe & CBE, VS Forged VS02 19"x9" +33 Slate Gray rims (20 lbs), AMS Intake, Z1 LSD, IPL badge, AMS badge, AMS expansion tank, EcuTek remote tune from Seb at Specialty-Z, Z1 HKS BOVs, AP Racing BBK Radi-Cal II calipers & J hook 2 piece rotors, SS lines, DOT 4, Level 10 Torque converter & transmission
JohnInNH is online now  
post #9 of 22 (permalink) Old 09-12-2019, 04:29 PM
Senior Member
 
securityguy's Avatar
 
Join Date: Aug 2019
Location: North Florida
Posts: 129
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 79 Post(s)
 
Garage
Default

Just curious...what Scan Tools is anyone using that you are very happy with and gives a professional amount of data like Scotty's but isn't $2000


2019 Fully Loaded Red Sport RWD Dynamic Sunstone Red / Black Interior
Carbon Fiber Package
Proactive Package
Sensory Package
Radiant Grill Emblem
Illuminated Kick Plates
Infiniti Welcome Lighting
Front & Rear Mud Guards
Xpel Paint Protection
Ceramic Tint 35%
Michelin Pilot Sport A/S 3+
Blackvue DR750S 2CH Dash Cam
securityguy is online now  
post #10 of 22 (permalink) Old 09-12-2019, 04:51 PM
Q50 Addict
 
JohnInNH's Avatar
 
Join Date: Apr 2018
Location: SW New Hampshire, USA
Posts: 3,193
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1336 Post(s)
 
Garage
Default

EcuTec tune has code reading and clearing ability. Under $2000 and you get the other goodies!!😎😉

2018 AWD Q50 RS, Graphite Shadow, NO DAS, 255/40ZR19, Pilot Sport 4S, Stillen rear Anti-sway Bar on stiffest, AMS HE, Fast Intentions high flo cats, resonated X-pipe & CBE, VS Forged VS02 19"x9" +33 Slate Gray rims (20 lbs), AMS Intake, Z1 LSD, IPL badge, AMS badge, AMS expansion tank, EcuTek remote tune from Seb at Specialty-Z, Z1 HKS BOVs, AP Racing BBK Radi-Cal II calipers & J hook 2 piece rotors, SS lines, DOT 4, Level 10 Torque converter & transmission
JohnInNH is online now  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Infiniti Q50 Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome