Where is diagnostic plug 1992 range rover - Range Rover Land Rover Cars & Trucks

Hi there,

As far as I can recall, some earlier Land Rover vehicles relied on reading LED flashes (or LCD display) from the vehicle's ECU computer itself, so try the following:

Locate the engine ECU (possibly hidden under the one of the front seats - remove carpet or cover; or behind the left hand kick panel). Once you have located the ECU and it has LED's or a display, do the following procedure:

1) Run engine up to operating temperature
2) Place gears in PARK or Neutral and turn ignition OFF & wait 3 seconds.
3) Turn ignition to position "II" (do not start) - Fault code will display
Note: repeat steps 2 & 3 to obtain any additional codes

4) If no codes display, then disconnect the White 5-pin connector plug (located behind r/hand underside of dash)
5) Repeat steps 2 (wait 3 seconds) & 3 again to see if codes display.

Feel free to post your codes here and someone will be happy to advise you further.

Cheers,