Got it from here:
showthread.php?t=14372
quote:
How to reset the ECU:
To erase trouble codes from the computer you have two ways. The first I have not verified, but I'm sure it works.
ECU clear memory procedure is as follows for auto and manual transmissions:
1. With engine at operating temperature, turn engine off. Place gear shift lever into park (auto transmission cars only).
· Locate the two ECU check connectors, for most cars they are located under the steering column and consist of a black plastic male and female connector, and a green male female connector. The exact location of the connectors varies with the different year models, but generally they are located under the steering column on the drivers side.
NOTE: sometimes they are still taped over with some small amount of plastic tape, so look hard, they will be there!
With the ignition OFF connect
black to black and green to green.
· Turn on ignition, do not start the engine, (and for auto transmission, cycle the gearshift lever from park to neutral and back to park ), depress the accelerator pedal to full throttle and hold for a few seconds, and then release. Start engine and then drive for at least one minute, keeping road speed above 10 mph.
· ECU is now re-set.
· At this point the check engine light should start to flash the all clear signal (steady 1/2 second interval flashes). If the check engine light does not flash, or indicates some other sequence, there is a fault present in the system, and should be checked for necessary repairs.
· Once done, stop the car and turn off the engine.
· Disconnect the plugs.
Here is the same:
http://www.scoobypedia.co.uk/index.php/ ... e/ECUReset
Quote:
Classic (JECS) ECU Reset
- Ensure engine is at normal operating temperature, turn engine off
- Locate the two ECU connectors, located under the steering column and consist of a black plastic male and female connector, and a green male female connector
- With the ignition OFF connect black to black and green to green.
- Turn on ignition, do not start the engine, depress the accelerator pedal to full throttle, then return it to the half-throttle position and hold for a few seconds, and then release
- Engine Check lamp turns on
- Start engine and then drive for at least one minute, keeping road speed above 11 Km/h.
- ECU is now re-set.
- At this point the check engine light should start to flash the all clear signal (steady 1/2 second interval flashes). If the check engine light does not flash, or indicates some other sequence, there is a fault present in the system, and should be professionally checked for necessary repairs.
- Stop the car and turn off the engine.
- Disconnect the black and green connectors.
- Job complete
Bugger! I missed the green plugs bit! D'oh!!!
I'll try Gannon's method 1st as its simpler, if it doesn't work then Paul's.