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Just put a new motor in a 99. It is a CA car with a federal ECU and engine harness. As expected a CE light popped up as the CAT configuration is not correct. But when checking the diagnostic port with a scanner...no data pops up. Pretty sure there is power but...??? Any ideas? BTW...the car runs fine but it would seem the ecu and port arent talking?
No info at 99 diagnostic port?
Started by
Ron Alan
, 12-23-2014 01:18 PM
#1
Posted 12-23-2014 01:18 PM
Ron Alan
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#2
Posted 12-23-2014 02:17 PM
davew
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There is a fuse that powers the data port. It is labeled something you would not expect to run that item. Check all fuses.
dave
Dave Wheeler
Advanced Autosports, the nations most complete Spec Miata shop
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#3
Posted 12-23-2014 02:31 PM
B(Kuch)Kucera45
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Like Dave said check the fuses. Also you have to remember it is a CA car so they use dif. AF, 02, sensors and ECM for there emissions.
Kuch
#4
Posted 12-23-2014 02:38 PM
Ron Alan
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There is a fuse that powers the data port. It is labeled something you would not expect to run that item. Check all fuses.
dave
Checked this and it is good...still nothing?
Like Dave said check the fuses. Also you have to remember it is a CA car so they use dif. AF, 02, sensors and ECM for there emissions.
Understood. But getting nothing is weird?
Back track and check everything again when i get back to the car!
Ron
RAmotorsports
#5
Posted 12-23-2014 02:46 PM
B(Kuch)Kucera45
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You can use a volt meter at the obd 2 connector and see if you have power there. If you don't you will have to get an EWD electrical wiring diagram and ohms test the wires back to the ECM to see if you have any opens.
Kuch
#6
Posted 12-23-2014 03:45 PM
davew
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There is a big main connector under the dash. Blue or green as I recall. I have seen the terminals break inside the plastic housing and cause this same issue. I think that car may have had a swimming issue at one time in its life.
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Dave Wheeler
Advanced Autosports, the nations most complete Spec Miata shop
Author, Spec Miata Constructors Guide, version 1 and 2.0
Building Championship winning cars since 1995
4 time Central Division Spec Miata Champion car builder 2012-2013-2014-2017
Back to Back June Sprints Spec Miata 1-2 finishes 2016 and 2017
5 time June Sprints winner in Mazda's
6 Time Northern Conference Champion Car Builder
2014 SCCA Majors National point Champion car builder
2014 SCCA Runoffs winner, T4 (Bender)
2014 Central Division Champion, ITS (Wheeler)
2013 Thunderhill 25 hour winning crew chief
2007 June Sprints winner, (GT1, Mohrhauser)
Over 200 race wins and counting.
www.advanced-autosports.com
dave@advanced-autosports.com
608-313-1230
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