NAS 90 Check Engine Light, no codes show - Defender Source
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  #1  
Old February 25th, 2017, 03:20 PM
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Jason Bullis
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NAS 90 Check Engine Light, no codes show

Maybe someone can point me in the right direction. 94 NAS 90 has red check engine light, no codes show on the LED readout. I read one post of someone taking the black cover off to see LEDs? How can I tell the code readout is good, or am I doing something wrong?
Thanks
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  #2  
Old February 25th, 2017, 03:24 PM
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Quote:
Originally Posted by Jbullis View Post
Maybe someone can point me in the right direction. 94 NAS 90 has red check engine light, no codes show on the LED readout. I read one post of someone taking the black cover off to see LEDs? How can I tell the code readout is good, or am I doing something wrong?
Thanks
Jason - when you say "red"....you mean the Service Engine light? (not Check Engine)

If that's correct, you need to push a pin/paperclip through the little brown "box" behind the dash to reset it. However, barring that working as a reset - honestly you can just pull the bulb from the cluster itself to avoid the light. It's only a dealer reminder light for the cats to be serviced.

Honestly I'd probably just pull the bulb, that's what I did on mine as I think it popped back on at some point after I reset it initially.
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  #3  
Old February 25th, 2017, 03:34 PM
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Jason- its the Check Engine Light

Quote:
Originally Posted by nathanwind View Post
Jason - when you say "red"....you mean the Service Engine light? (not Check Engine)

If that's correct, you need to push a pin/paperclip through the little brown "box" behind the dash to reset it. However, barring that working as a reset - honestly you can just pull the bulb from the cluster itself to avoid the light. It's only a dealer reminder light for the cats to be serviced.

Honestly I'd probably just pull the bulb, that's what I did on mine as I think it popped back on at some point after I reset it initially.
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  #4  
Old February 25th, 2017, 05:10 PM
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Bob Vogler
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Quote:
Originally Posted by Jbullis View Post
Maybe someone can point me in the right direction. 94 NAS 90 has red check engine light, no codes show on the LED readout. I read one post of someone taking the black cover off to see LEDs? How can I tell the code readout is good, or am I doing something wrong?
Thanks
This is a total shot in the dark (pun intended), but on my 95 D90 the LED readout is so dim that the first time I checked for a code I thought it wasn't working.
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Old February 25th, 2017, 05:20 PM
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If you can get to the white plug for the ecu you can clear the code (and show any more in series) otherwise I would disconnect the battery for 5 minutes and let it clear.

------ Follow up post added February 25th, 2017 03:22 PM ------

No code is usually a transient issue (usually 44,45 or 48 which are o2's and the stepper )
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Old February 25th, 2017, 05:22 PM
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Originally Posted by rlynch356 View Post
If you can get to the white plug for the ecu you can clear the code (and show any more in series) otherwise I would disconnect the battery for 5 minutes and let it clear.
He's done that a couple times (disconnect battery), code keeps popping back up. Talked to him, and he's going to drop the A/C to see if he can get back there and check the connector (he had it down previously and thinks he could have knocked something loose). Also going to try to get him a Rovergauge to troubleshooting as well.
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  #7  
Old February 25th, 2017, 05:50 PM
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I wonder how much this broken wire has to do with the code reader? I held the wire to the point and still couldn't get a read. I just order a working reader off eBay. Let's see if that gets me a code.
Thanks Jason and Rob
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  #8  
Old February 25th, 2017, 05:53 PM
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Time for a Rovergauge.
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Old February 25th, 2017, 06:10 PM
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Jason Bullis
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Where can I get one?


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Time for a Rovergauge.
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  #10  
Old February 25th, 2017, 06:19 PM
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NAS 90 Check Engine Light, no codes show

Jason I ordered my cable from the U.K. I'll see if I can find the site again and I owe you the service and parts manuals I'll get those to you

------ Follow up post added February 25th, 2017 04:24 PM ------

This is the guy I got mine from
http://www.g33.co.uk/fuel_injection.htm

His email is at the bottom of the page


Huge upload of Doc's in the box invite i sent you
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  #11  
Old March 8th, 2017, 10:30 PM
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Jason Bullis
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Changed the vss unit, replaced the small speedo cable, and switched out the speed gear to the black. I back in business, no light anymore, and speedo looks with 8 mph. Rob, thanks for letting me borrow the rovergauge cable...
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