Mitsubishi Diamante
Having trouble with your Diamante ECU or TCU?
These early 1990 to '94 Mitsubishi ECUs and TCUs are prone to failure due to the original factory electrolytic capacitors. When they get to a certain age the capacitors start slowly leaking an oily fluid that eventually will corrode the copper lines of the printed circuit board, as well as degrade or ruin the metals of any components that were saturated in the acidic chemical.
After an ECU or TCU has been properly overhauled, the capacitor problem will not be back again. Only the old original factory capacitors, be it from Nichicon, Rubicon or otherwise, are what is causing all the trouble. These capacitors were all made in the 1980s, and later wound up in various Japanese brand electronics and automotive control units in the early to mid 90s. This is not a problem with contemporary components.
Repair & Return Service of your Mitsubishi Diamante ECU or TCU
Ships back out within 1-2 business days
Return shipping included
5 year warranty
To have your unit repaired, send your unit to us at the address below. Please tape a note to it with your name & phone number, including a brief description of your symptoms.
After it arrives, we will inspect it and call you to notify you of what we find.
Foreign Auto Computer Repair
200 Private Road 7869 Ste. 101
Holly Lake Ranch, TX 75765
Attn: '92 owners:
Before sending in a '91-'92 MD740087, MD739228, MD751888, MD758085, or MD758086 for rebuild and return service, please check the main processing chips on the circuit board for signs of the examples below.
If you have either of these on your TCM, it will not be repairable.
There is one large chip and two smaller ones on these.
This is the classic bubbled chip. It is possible to replace the chip, but it is not available for replacement.
The brown center burnt chip is easy to miss, as sometimes it is very faint, not as obvious as this one. Regardless, it is still a board killer.
Re-manufactured Diamante Engine Control Unit
Re-manufactured Engine Control Unit
Free Security Transfer
5 year warranty
Included in the sale is the transfer of the security coding for the immobilizer, so that you will not need any reprogramming, you can just plug it in.
To do this, you must send us your original ECU, that is where we are getting the security from. Please send your ECU to the address below:
Foreign Auto Computer Repair
200 Private Road 7869 Ste. 101
Holly Lake Ranch, TX 75765
For more information, call (800)-241-6689 or text 903-216-6456
Popular Diamante #s
ECUs
MD175551
MD175552
MD175553
MD164446
MD192726
AW331080
AW331081
TCUs
MD739228
MD740087
MD751888
MD758085
MD758086