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DiscoWeb Bulletin Board » Message Archives » 2003 Archives - Discovery Technical » Archive through March 17, 2003 » OBDI check engine light on 95 d1 « Previous Next »

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Andy Thoma (Andythoma)
Member
Username: Andythoma

Post Number: 70
Registered: 01-2003
Posted on Monday, March 10, 2003 - 11:26 am:   Edit Post Delete Post Print Post

I have a 95 D1 that the check engine light is on. The error code reads "12" which according to the tech section on dweb it means the airflow meter. I was doing an oil change this weekend, when I let the oil drain, I disconnected the airflow meter to clean the intake hose, airflow screen and air box. I put them back together, but forgot to plug in the airflow meter. I started the truck after putting oil in to check the level. The truck idled poorly and I realized it was because of not plugging in the airflow meter, plugged it in and now the truck runs great. However now I get the error code. Will the code reset it self? Should I (and how) do I check the airflow meter? Does disconnecting the battery for 30 mins work for reseting the code? Any help is appreciated.
 

Jerry (Discovery1)
New Member
Username: Discovery1

Post Number: 21
Registered: 10-2002
Posted on Monday, March 10, 2003 - 11:39 am:   Edit Post Delete Post Print Post

Hi:

reset the check engine light. The relay is located under the passenger seat. You will need a small screw driver to reset the relay. I believe the relay is red? It has been a while. Do a search for this on discoweb and you should find the information.

Thanks
 

Andy Thoma (Andythoma)
Member
Username: Andythoma

Post Number: 71
Registered: 01-2003
Posted on Monday, March 10, 2003 - 12:02 pm:   Edit Post Delete Post Print Post

I thought that was the service engine light reset. My dash light is the check engine light, the yellow one.
 

Andy Thoma (Andythoma)
Member
Username: Andythoma

Post Number: 72
Registered: 01-2003
Posted on Monday, March 10, 2003 - 02:23 pm:   Edit Post Delete Post Print Post

If any one has a check engine code in a 95 d1 that the fault was repaired, but the code remains. Try disconnecting the battery for 30 minutes. I did that and all is good again.
 

Paul T. Schram (Paulschram)
Senior Member
Username: Paulschram

Post Number: 1110
Registered: 02-2002
Posted on Monday, March 10, 2003 - 02:59 pm:   Edit Post Delete Post Print Post

Wrong! On the passenger side above the kick panel, there is a white connector. To turn the light off, turn key to on, disconnect the white connector, turn key off, wait for relay to drop, plug connector back in and the light should be off.

Yes, it goes against everything I was ever taught to disconnect logic circuits while hot, but this is the no BS method to correctly extinguish the yellow check engine light.

Disconnecting the battery runs the risk of setting other codes, disabling the air bags and in some cases, the ABS.

Peace,
Paul
 

Jim H. (Victor_mature)
New Member
Username: Victor_mature

Post Number: 14
Registered: 02-2003
Posted on Monday, March 10, 2003 - 03:31 pm:   Edit Post Delete Post Print Post

Paul, I thought it was okay to disconnect the battery on D1's - I thought it was the DII's that didn't like to be without battery for too long.
Also, every procedure in the book (to include Removing Ashtray) starts by stating "Disconnect battery".
 

Andy Thoma (Andythoma)
Member
Username: Andythoma

Post Number: 73
Registered: 01-2003
Posted on Monday, March 10, 2003 - 03:31 pm:   Edit Post Delete Post Print Post

Glad to know the real reset method, since my air bag light and anti lock light are both on because of other problems, disconnecting the battery isn't going to effect me. But its nice to know the real method.
Thanks
 

Paul T. Schram (Paulschram)
Senior Member
Username: Paulschram

Post Number: 1113
Registered: 02-2002
Posted on Monday, March 10, 2003 - 03:43 pm:   Edit Post Delete Post Print Post

Jim:
Yes, I am aware that the factory manual says to disconnect the battery before checking tire pressure, but the dealer also has the tool to turn the lights out.

It is far worse to disconnect the battery on a GEMS equipped engine. At the least, you will lose some of the memory of those parameters that are dependent upon driving/operating conditions.

On the DIs, you run the risk of frying the ECU for the ABS and disabling the air bags permanently. These vehicles do not tolerate variations in system voltage well at all.

PEace,
Paul
 

Jerry (Discovery1)
New Member
Username: Discovery1

Post Number: 22
Registered: 10-2002
Posted on Wednesday, March 12, 2003 - 12:11 pm:   Edit Post Delete Post Print Post

Sorry for the confusion. My advice was for resetting the service engine light......

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