BMW M5 Forum and M6 Forums banner

1 - 2 of 2 Posts

·
Registered
Joined
·
18 Posts
Discussion Starter #1
Hi ,
my e34 m5 1992 3.6 doesnt do a flap test when starting.
New vacuum lines new solenoid .
flap opens when directly connected to 12 v.

What possibly go wrong
i have 2 modules and both not working.
How to test them what part may fail.
Opened them both the boards are good no bad connections and not burned.

Rpm is also working fine.

What else shoukd i check ?
thank you
 

·
Registered
Joined
·
735 Posts
1. Ignition ON, do you get ~12V on the wire that goes from the solenoid of the resonace flap to the control unit?
2. Ground the wire that goes to the resonance flap and see if it operates
3. Power and earth OK
4. Does the TD wire get to the module? Can you hoop up a LED tester to see if it blinks while the engine is running?
 
1 - 2 of 2 Posts
Top