× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
1990 BMW 325i, Ignition Waveform
Posted to the Waveform Library on 4/27/2014

This was a No start/No spark problem. The ECM (Motronic control unit) controls the ignition coil. A new ECM was the fix for this problem. Suspect that the transistor in the ECM failed. Looks like it was allowing current to "leak" through when it should have be...

 

car Vehicle Data

1990 BMW 325i 2.5L

Engine2.5 L / 6 cyl / GAS
Trans5-speed StandardTransmission
DeliveryFuel Injection
SubsystemIgnition
Component
ConditionKnown Bad

car Vehicle Data

1990 BMW 325i 2.5L

Engine2.5 L / 6 cyl / GAS
Trans5-speed StandardTransmission
DeliveryFuel Injection
SubsystemIgnition
Component
ConditionKnown Bad