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Post by djhackstyle on Oct 20, 2013 7:54:01 GMT -8
Ive been wanting to perform ABS tests on my 2003 nissan maxima because im having some brake problems.
When the ABS test was added for nissan i quickly tried it out but i keep getting "negative or no response from ECU"
Theres 3 different abs modules for the 2003 nissan maxima
Auto with traction control abs module
Auto without traction control abs
module
6Speed manual without traction control abs module
I confirmed with another forum member his auto with traction control abs module does allow him to perform tests, however i have the 6spd manual without traction,and cant get into the abs module. anyway of getting this to work? all other tests such as rpm adjustment and timing advance work great.
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Post by Issac on Oct 20, 2013 8:56:29 GMT -8
The app requires ABS module communication line at pin 7 of the 16 pin OBD2 Diag connector. Some of the ABS COM lines are 14 pin diag connector and not compatible with Elm device. Verify which system it uses with wiring diagram.
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Post by knight_yyz on Oct 22, 2013 15:56:11 GMT -8
Abs sensors on automatic and 6 speed a completely different. They send different signals.
The 6mt produces a sine wave generated by a coil and a bar magnet.
The auto produces a square signal produced by a magnet and an IC.
On the 6mt the greater the speed the higher the voltage, on the auto the frequency of the square wave increases.
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Post by djhackstyle on Oct 22, 2013 19:45:46 GMT -8
The app requires ABS module communication line at pin 7 of the 16 pin OBD2 Diag connector. Some of the ABS COM lines are 14 pin diag connector and not compatible with Elm device. Verify which system it uses with wiring diagram. Ok i admit i dont know too much but i took a look at the wiring diagrams for 03 nissan maximas and for the automatic it shows pins 7 & 9 are used from the OBD2 connector and for the manual it shows pins 13,12, & 9 heres the wiring diagram on my dropbox incase theres something that can be done db.tt/2mGXYku4Page 46 shows AUTO abs unit and M28 data link connector seems to be the obd2 port And page 42 shows the manual abs unit and u can see the different pin outs on the same M28 data link connector. |
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Post by knight_yyz on Oct 23, 2013 3:49:37 GMT -8
Data link connector for the 6 speed uses pins 4, 21 and 24 to the obd2.
3 and 6 are used on the auto models.
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Post by knight_yyz on Oct 23, 2013 4:08:01 GMT -8
sorry I read that wrong, the numbers on the schematic are for the ECU not the obd2 port. Your numbers are correct.
I believe the common number 9 is battery power, the other pairs are the outputs for sine wave and square wave, mt and auto
So if an MT guy tries to use gauge pro to test ABS he is not getting the signal through 7&9 and therefore there is an error
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Post by Issac on Oct 23, 2013 21:04:44 GMT -8
It appears both Diag lines are required and Pin 9 is not supported by Elm products. Normally, L Lines are at pin 15 and supported by Elm.
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Post by knight_yyz on Oct 24, 2013 6:14:17 GMT -8
That's odd, because if you look at section ec page 736 the diagram shows that the pins for data link connector that are used are 1,4 5,7,8 and 16 only
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Post by djhackstyle on Oct 24, 2013 12:16:27 GMT -8
That's odd, because if you look at section ec page 736 the diagram shows that the pins for data link connector that are used are 1,4 5,7,8 and 16 only Heres section EC db.tt/NaFC5H1w |
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Post by Issac on Oct 24, 2013 17:15:40 GMT -8
That's odd, because if you look at section ec page 736 the diagram shows that the pins for data link connector that are used are 1,4 5,7,8 and 16 only It is probably related to powertrain ecm. |
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Post by GP on Feb 19, 2016 8:33:13 GMT -8
I am also having the same issue. I am checking it on my 2001 Nissan Maxima auto tranny(no traction) though.. Any inputs?
Thanks
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Post by Aza on Mar 6, 2020 20:59:49 GMT -8
That's odd, because if you look at section ec page 736 the diagram shows that the pins for data link connector that are used are 1,4 5,7,8 and 16 only It is probably related to powertrain ecm. |
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