1994 Ford Explorer

Computer problem
1994 Ford Explorer 6 cyl Four Wheel Drive Automatic 125000 miles

I have a 1994 xlt explorer. I purcased a code reader obd1 #3145, tried to hook it up to discover it is not the correct one. What type do I need for this model. Thank you
Kevin Prenger
October 20, 2008.


Here are a couple diagrams for retrieving codes...

Auto Repair Manual - How to read codes (No Special Tools Needed)

1 Ensure the engine and oxygen sensor is up to operating temperature.
2 Turn the ignition OFF.
3 Connect an LED tester or Voltmeter, (Click here for details) to points labelled A and B on the diagram
4 Use a wire link to connect terminals as shown on the diagram.
5 Start Engine.
6 The fault codes will be shown on the LED tester or Voltmeter connected.
7 Read codes as described in the Code Format Description below.
8 Press the continue button to enter the code numbers and get the code description.

Connector Diagram

Single pin connector is grey in colour.


Ford KOER diagram above is described as follows
" Engine Running ID Code. Number of reflects cylinders in vehicle. (diagram shows a 6 cylinder vehicle)
2 = 4 Cylinders
3 = 6 Cylinders
4 = 8 Cylinders
5 = 7.3L Diesel
" If the vehicle is equipped with a Brake On/Off (BOO) switch, the brake pedal must be depressed and released after the ID Code is transmitted.

" If the vehicle is equipped with a Power Steering Pressure Switch (PSPS), the steering wheel must be turned atleast 1/2 turn and released within 2 seconds after the engine ID Code is transmitted.

" If the vehicle is equipped with the E4OD transmission, the Overdrive Cancel Switch (OCS) must be sycled after the engine ID Code is transmitted.

" A 6-20 second pause.
" A single flash indicates the Dynamic Test Responce Code. When observed briefly take the engine to wide open throttle.
" A 4-15 second pause. during this time ignore any quick flashs that may occur.
" Fault code 132. (vehicle will either emmitt 2 or 3 digit codes)
" A 4 second pause seperates next Hard Fault Code.

Oct 20, 2008.