RRC "Diagnostic Connector"?

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Author Message   Ben S (Roverguy) New Member Username: Roverguy Post Number: 3 Registered: 06-2003 Posted on Friday, June 20, 2003 - 04:01 pm:    The following is from the Atlantic British tech tips page. "Engine Misfire, Stumble - Troubleshooting Vehicle - Land Rover Defender '94-'95, Range Rover Engine misfire or stumble under acceleration or load may be caused by a poor connection in the diagnostic connector under the right seat, adjacent to the ECU on the Range Rover or in the footwell behind the fascia lower trim panel on the Defender. The pins on the female side of the plug tend to open up and need to be crimped tighter. Clean the pins with contact cleaner and reconnect. Secure with a nylon wire tie to prevent a recurrence." Exactly what "diagnostic connector" are they talking about? What does it look like on a '91 RR? I wouldn't think that they're talking about the plug for the LED control unit or the brown box for the service engine light. Please correct me if I'm wrong. Thanks!   P38a (P38a) New Member Username: P38a Post Number: 1 Registered: 06-2003 Posted on Friday, June 20, 2003 - 11:21 pm:    OBD plug?   Steve Cooper (Scrover) Senior Member Username: Scrover Post Number: 364 Registered: 09-2002 Posted on Saturday, June 21, 2003 - 12:14 am:    I believe it's a plastic 2 pin connector which has a dummy plug in it when not being used for diagnostics. The dummy has a jumper wire shorting the 2 pins together. If it comes loose it can cause a misfire. The remedy, as stated, is to put a zip tie around the connector and plug.   Ben S (Roverguy) New Member Username: Roverguy Post Number: 4 Registered: 06-2003 Posted on Saturday, June 21, 2003 - 05:04 am:    Thanks, I will give that a shot.   Aaron Richardet (Draaronr) Member Username: Draaronr Post Number: 146 Registered: 09-2002 Posted on Saturday, June 21, 2003 - 08:47 pm:    It should be shit brown colored.   Land Rover Certified Used A**hole (Jason) Senior Member Username: Jason Post Number: 485 Registered: 04-2002 Posted on Tuesday, June 24, 2003 - 08:09 pm:    Anybody have a pic? My RRC has been running suspect to the diagnosis (and though I've blamed it on other stuff) and I went to have a look. The only thing remotely matching the description of a 2-lead plug with a jumper wire is a plug where the "jumper" has about 2 resistors wired in series and covered in translucent plastic. Is this the plug?   Steve Cooper (Scrover) Senior Member Username: Scrover Post Number: 367 Registered: 09-2002 Posted on Wednesday, June 25, 2003 - 05:27 pm:    This is from the AllData site: It's just a loose cable under the RH seat.   Steve Cooper (Scrover) Senior Member Username: Scrover Post Number: 368 Registered: 09-2002 Posted on Wednesday, June 25, 2003 - 05:29 pm:    image too big, i'll resize it tonight   Land Rover Certified Used A**hole (Jason) Senior Member Username: Jason Post Number: 490 Registered: 04-2002 Posted on Wednesday, June 25, 2003 - 07:25 pm:    e-mail it to me: [email protected] And location descriptions don't exactly help as this is an OBDI EFI system I installed in my '83. Maybe I'll check my Disco this evening and identify what I should be looking for on the loom of my RRC.