Reset the ST165 ECU
When do I want to reset the ECU?
- After a performance upgrade e.g. exhaust, air filter
- After engine repairs e.g. lambda sensor replacement
- To clear stored faults
- If the car is playing up, sometimes an
reset can cure the fault
Why do I want to reset the ECU?
- To restore the ECU to basic settings and to a certain extent "learn" the new engine characteristics
- To reset the ECU to factory defaults and again "learn" the new engine characteristics
- Certain faults are stored in the memory and some may restrict the operation of the engine e.g. when you hit fuel cut this
is stored in memory and whenever you make positive boot pressure then the ECU
will cut fuel again - this will keep happening until the ECU is reset
How do I reset the ECU?
There are 2 "levels":
- Soft reset - simply turning off the ignition
for 10 seconds - handy when trying to sort out the
FCD! Don't expect your
brakes or steering to work though!
- Hard reset - either pull a lead off the battery, (pain), or simply pull out the ECU fuse
How do I reset the ECU using the easy method?
Locate the main engine bay fuse box - the largest fuse box on the right hand side of the engine bay.
|Fuse box cover
Remove the ECU fuse for approx 10 seconds to clear the memory of the ECU. Fuse location shown above.