Help with ECU reset with CEL - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old November 1st, 2011, 12:27 PM
hunterjah's Avatar
hunterjah
Status: Offline
Jesse Hardin
Past: '97 D90 LE #135
Member
 
Join Date: Sep 2011
Location: Tyler, TX
Posts: 275
Help with ECU reset with CEL

Just bought a 97 D90 LE #135. Took the car to the dealer for an inspection so I could pay tax and noticed the Check engine light had come on. The dealer reset the CEL (speed sensor issue) and it has not come back on sense then. My issue is the computer has not reset itself so the dealer can perform the inspection. The inspection diagnostics shows it cannot perform the oxygen sensor and catalytic converter test.

Question, do you guys know how many miles, how long it should take for the computer to reset itself. I so far have driven it more than 200 miles and the diagnostics still won't allow the computer to reset.

Any help is greatly appreciated!
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old November 1st, 2011, 12:42 PM
evilfij's Avatar
evilfij
Status: Offline
evilfij
I have never seen a rover in person
Member
 
Join Date: Oct 2003
Location: on the internet
Posts: 14,688
3 drive cycles. Ie: drive around for 10 minutes or so shut off is one drive cycle.
__________________
*not legal advice*
Reply With Quote
  #3  
Old November 1st, 2011, 01:47 PM
hunterjah's Avatar
hunterjah
Status: Offline
Jesse Hardin
Past: '97 D90 LE #135
Member
 
Join Date: Sep 2011
Location: Tyler, TX
Posts: 275
Thanks Evilfij,

So I've cycled well more than three times since the faults showed. Would you have any ideas why the diagnostic equipment would not show a system reset?
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old November 1st, 2011, 06:50 PM
hunterjah's Avatar
hunterjah
Status: Offline
Jesse Hardin
Past: '97 D90 LE #135
Member
 
Join Date: Sep 2011
Location: Tyler, TX
Posts: 275
Any other thoughts about why an ECU wouldn't reset?
Reply With Quote
  #5  
Old November 1st, 2011, 06:54 PM
o2batsea's Avatar
o2batsea
Status: Offline
Bill Adams
66 109 sw 94 lwb
Member
 
Join Date: Jul 2009
Location: kensington md
Posts: 6,502
Registry
Did you try disconnecting power to clear the flash memory?
__________________
Bill Adams

1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
Reply With Quote
  #6  
Old November 3rd, 2011, 01:37 AM
DefenderPilot
Status: Offline
George
1997 D90 SW
Member
 
Join Date: Oct 2010
Location: Los Angeles
Posts: 404
The problem may still excises even though the light is off and code was cleared. If you keep driving you may see the light come back on which would confirm this. The speed sensors also look like ABS sensors on the Defender. If they come out even a little then you will have this issue. If the light comes on then check them and push each one all the way in. Once they are all the way and the wheel turns they are made to self adjust back to where they need to be. The correct way to avoid them moving again is you need to change the bushing sleeve that they sell and those are one time use so they need to replaced everything the sensor is moved. Hope that helps!
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Tags
ecu

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Speed Sensor and ECU Issues DJ Menasco Defender Technical Discussions 14 February 16th, 2006 08:45 PM
Interface on '94 ECU (OBD-I?) jaherring Defender Technical Discussions 10 October 11th, 2005 10:06 PM
ECU readout cbass Defender Technical Discussions 15 September 17th, 2005 10:05 PM
Where did you put your ECU jcasteel Defender Technical Discussions 6 January 12th, 2005 11:31 AM
Wiring question - bypassing ECU for rear defogger dmarchand Defender Technical Discussions 8 September 30th, 2004 11:21 AM


All times are GMT -5. The time now is 04:00 PM.


Copyright