C103 is a 47uF but as noted below, a 50uF would probably work without issue. I had read C1 is 100nF as a possibility elsewhere. I've been searching around for info since this past Monday of the long weekend.
At least somebody can kind of confirm what I had found. It's a starting point and even if the value is slightly out, I'm hoping that it gets the unit working enough for the vehicle to run. I know for example, with other electronics I've worked with, if an item is 100nF and you use an 82nF or a 120nF, it really won't make a difference. Then again, guitar amps/pedals may be different than a vehicle. :)
Thank you very much for replying.
kostuch wrote:
If I remember correctly, C103 is 50uF and C1 is 100nF Unfortunatelly, currently I have no such ecu to confirm these values.
-- Edited by kostuch on Thursday 6th of September 2012 10:22:28 AM
-- Edited by TOTech on Thursday 6th of September 2012 11:45:08 PM
I have a 33920-56B40 that had C103 leak. The ECU is currently not working.
When cleaning the board after removing the bad part, it became obvious that the trace between C103 & C1 had lifted and was damaged as well as C1 is lifting. The left side of C1 is still attached.
I know this probably sounds crazy but if any knows the value of C1, I was hoping to use a regular capacitor to attach to the far left pad of C1 and use the right side of a regular capacitor to attach to the left leg (-) of C103 and maybe get this ECU working again.
Are there any detailed schematics with values listed for this ECU?
If this fails and I have to source a new ECU, can one swap the 33920-56B40 A/T with a 33920-56B30 M/T or will there be problems? Are there any other ECUs from other Geo/Suzuki vehicles that can be swapped in for the 33920-56B40?
Well, before I start buying whole replacement parts, I have an idea that I would like to try to see if this fixes the problem. Knowing the value of C1 in the ECU circuit would help.
I have the capacitor off the board as it was half off from damage and desoldering the other side was simple.
Rhinoman wrote:
A 56B30 does not have the A/T functionality however I can provide an exchange replacement, if you require this please contact me by email at
