So when you turn the key to the start position, the car does not crank?
You have looked at a lot of videos but didn't tell us what you have investigated. That does not help us narrow down your problem.
The security system (EWS) has two functions:
- Crank disable. The EWS has to recognise the key code and a few other things before enabling crank.
- Drive away protection. Once the EWS recognises the key it will send a ISN code to the DME. If the code matches the one in the DME, the DME will enable spark.
An easy way to see if the EWS is the problem is to check fuse 01, 30 A, in the engine electronic fuse carrier under the bonnet/hood for 12 v DC. If the fuse has power, then the security system has been fully disabled. Your problem will a loose electrical connection or faulty starter motor.
If there is no voltage at fuse 01, then you have an EWS problem. It could be:
- Clutch switch or the Park Neutral selector switch.
- Key
- Ignition switch induction coil
- EWS
The best way to sort this out is to get a good scanner with BMW software and check for trouble codes in the engine computer (DME) and the EWS. Install "BMW Standard Tools" (free) onto a windows laptop and buy the cheap special cable. Get it here https://www.e46fanatics.com/threads/...tools.1274003/
Post the trouble codes and the descriptions here and we can help you.
Last edited by Muzz258; 11-12-2020 at 03:44 PM.
1999 2.8L Z3 Roadster,
2000 3.0L Z3 Roadster,
There is only one thing more pleasurable than working on a Z3, that's driving it top down on a fine day.
Bookmarks