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2000 740i: BMW..starter when short across terminals with screw driver

Resolved Question:

2000 740i BMW,new starter and starter just click,can turn starter when short across terminals with screw driver,have tried three starters,all does the same rhing.
Submitted: 4 years ago.
Category: BMW
Expert:  Roger replied 4 years ago.

Hello Jerry,

 

Most likely the GPS unit was just a coincidence. It is very common for the Navigatioin units to go bad on this year.

 

For the starter, I think I have the correct wiring diagram.

The starter control goes through an EWS module. This module is there for theft protection. It has to see a valid key and then the code checked from the DME (engine module) to allow the starter to turn. There is a relay also that could be the problem.

 

graphic

 

 

The starter relay location is: In the Ebox with the DME and EGS module. This would be in the engine compartment on the passenger side under a plastic cover.

 

K6324, X6324

G_030030

rear RH side of engine compartment in E-Box under control modules

K6324Starter relay
X6324Component connector (9-pin, Black), Starter relay

 

 

 

The first thing to check is do you have voltage to pin 6 at the relay when cranking. If not then the EWS is most likely the failure.

 

By looking at the relay wiring if 12 volts were applied at pin 2 the starter should spin. This would be in essence jumpering the starter from the relay like you are doing with a screw driver. If the starter turns from this point it shows that the wiring is good from the relay to the starter and again points to the EWS as a possible problem. I would also try another key as a bad key could prevent the start signal from being release from the EWS module.

 

I hope this information will be helpful. Thank you.

Roger, BMW Master Tech
Category: BMW
Satisfied Customers: 5786
Experience: 10 yrs. experience as BMW Master Technician, shop foreman and dealer.
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