Go Back  MyG37 > Tech Area > Audio, Video & Electronics
Reload this Page >

Help Disconnecting Battery Current Sensor?

Notices
Audio, Video & Electronics Post questions, reviews, and other general info about the G's Nav, sound system, satellite radio or aftermarket stereos

Help Disconnecting Battery Current Sensor?

Old 07-03-2019, 01:43 AM
  #1  
0MGG37
Registered User
Thread Starter
 
Join Date: Jul 2017
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Disconnecting Battery Current Sensor?

Hey guys so Iím running a big 3 ground kit using 1/0 OFC wires. After research Iíve read that grounding the battery to the chassis shorts out the battery current sensor. Now I also read that disconnecting the battery current sensor on the negative cable disables this to regain traditional alternator/battery recharge method , will disconnecting this throw any CEL codes? I noticed P1550 code is related to the battery current sensor so I want to make sure that unplugging this to get back a full 14+ Volts constantly wonít cause me any check engine light to come on? thanks !
0MGG37 is offline  
Old 07-03-2019, 05:38 AM
  #2  
Surfnazi
Registered User
 
Join Date: Nov 2013
Posts: 1,348
Received 97 Likes on 92 Posts
No you dont need to
Surfnazi is offline  
Old 07-03-2019, 09:45 AM
  #3  
BULL
Registered User
 
Join Date: Jun 2019
Posts: 57
Received 11 Likes on 5 Posts
You shouldn't need to remove it. If you're replacing the post, then use the same cable with sensor and add it to the new post.
BULL is offline  
Old 07-03-2019, 09:53 AM
  #4  
0MGG37
Registered User
Thread Starter
 
Join Date: Jul 2017
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by BULL View Post
You shouldn't need to remove it. If you're replacing the post, then use the same cable with sensor and add it to the new post.

Im not replacing the post, Iím actually just upgrading the wire thickness on all the power/ground wires leaving all the original battery cables there. Iím running a high power audio setup so Iím upgrading

1)battery negative to chassis ground
2)alternator positive to battery positive
3)engine ground to chassis

not removing any factory wiring, just adding 1/0 gauge copper wire. Since our negative battery cable uses the current sensor, I noticed when I upgraded the negative to chassis my car stayed at a current 13.3 Volts instead of the 14V+ Due to the current sensor. I read that unplugging this sensor (little box wrapped around the cable) disables this ďsmart chargeĒ feature the G37 uses to regain the traditional alternator to battery recharge meaning with the upgraded ground wire my G37 will not use the smart charge feature and allow the car to charge up past 14V+ with the engine on.

Because leaving the negative post that has the current sensor, WITH the upgraded ground as well (that has no current sensor) wonít allow the current sensor to do its job and let the car only charge up to around 13.2-13.3V instead of the targeted 14V that a normal car would reach or in this case, what our G37 would reach if the current sensor isnít shorted out by adding another ground without the current sensor.

so in simple terms, the original negative post is still on the battery, I just have an extra ground going from the original grounding spot to the negative post meaning the negative post has 2 grounds. To beef up the cars weak grounds. By doing so, it is disabling the smart charge feature the current sensor on our negative battery wire does because now there is a ground wire WITHOUT a sensor on the battery as well, meaning our battery will never see 14V+ because it will always think itís full.

P.S sorry for the long read, after all the reading on the forums Iíve done, Iím sure this will help tons of people in the future as well

Last edited by 0MGG37; 07-03-2019 at 10:04 AM.
0MGG37 is offline  
Old 07-03-2019, 10:09 AM
  #5  
BULL
Registered User
 
Join Date: Jun 2019
Posts: 57
Received 11 Likes on 5 Posts
Originally Posted by 0MGG37 View Post

so in simple terms, the original negative post is still on the battery, I just have an extra ground going from the original grounding spot to the negative post meaning the negative post has 2 grounds. To beef up the cars weak grounds. By doing so, it is disabling the smart charge feature the current sensor on our negative battery wire does because now there is a ground wire WITHOUT a sensor on the battery as well, meaning our battery will never see 14V+ because it will always think itís full.

P.S sorry for the long read, after all the reading on the forums Iíve done, Iím sure this will help tons of people in the future as well
I did not think about that, you should check the ID of the sensor and see whats the maximum gauge it accepts and run it.

I wonder if thicker strand wire will help in this situation.
BULL is offline  
Old 07-03-2019, 10:36 AM
  #6  
0MGG37
Registered User
Thread Starter
 
Join Date: Jul 2017
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by BULL View Post
I did not think about that, you should check the ID of the sensor and see whats the maximum gauge it accepts and run it.

I wonder if thicker strand wire will help in this situation.
Originally I intended to run new wire through the sensor but the wire Iím running (Rockford Fosgate 1/0 OFC) is way too thick, looks like max gauge you can run is 6 gauge through it. I do not want to mess with the original ground though so I didnít bother taking it apart either way. I read somewhere on the forum that if you unplug this little box, the smart charge feature is disabled. After some more reading it looks like there is a trouble code related to issues with the battery current sensor if it ever has issues so Iím wondering if unplugging this will cause any issues or cause any CEL. Thank you for your response as well, very much appreciated .
0MGG37 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
BurtoN86
D.I.Y. Installations/Modifications
1
05-05-2015 10:22 AM
Newad
General Tech Questions
9
08-02-2014 02:35 PM
rks
General Tech Questions
1
07-31-2013 02:51 PM
bmbweber
Body Interior Exterior Lighting
13
07-24-2013 08:43 PM
]\[ /-\ ]\/[
Engine, Drivetrain & Forced-Induction
12
12-11-2007 10:16 PM


Thread Tools
Search this Thread
Quick Reply: Help Disconnecting Battery Current Sensor?


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.