I recently had the 80 partially tore apart, running coax down the passenger side, for a CB install.
As often happens when I undertake any project on the Cruiser, I end up following what I call rabbit trails; one project leads me to investigate something different, that may lead to something else completely different, again & again.
So, as I was saying, the CB install had much of the dash removed. During this process, I noticed the passenger side floor mat backing was damp. I have also been chasing down an issue with coolant consumption (or a leak). Thinking the damp mat might be a sign of a leaking heater core. Since I already had the glove box & supporting brace removed, I thought I should pull the A/C evaporator unit out (I also have another issue with that & the system is empty at the moment) so I could inspect the heater core for a leak (I had already put a UV dye in the coolant & my handy UV flashlight makes leak identification much easier). - RABBIT TRAIL #1
During the removal of the evaporator unit, I had to remove (or at least dismount) the ECM. In doing so, I noticed a rattle from the computer (as if there was a small pebble or something similar inside the case, loose. Having had the cooling unit assembly out last Summer, for replacement of the expansion valve, I seem to remember the rattle was there then too. But because I was in a hurry and it didn't seem to affect how the Cruiser ran, I left it alone.
Well, this time, I wanted to know WHAT that rattle was. So, I completely removed the computer & decided to open the case to investigate. - RABBIT TRAIL #2
Upon opening the ECM casing, out drops a small black electronic component; about the length of a pencil eraser (the pink round one that comes attached to the tip of a pencil), only slightly larger diameter. It looked like the Danny Devito of diodes, short & squatty.
Inspecting further, I found to spot with a he missing component - D105
Now, I've found a couple of threads detailing similar problems, with D105 being melted off the mounting legs. These look exactly like what I've found in mine. All of these seem to have one thing in common, they have issues with the engine dying & not starting. The kicker is, mine seems to run fine.
After reading through these threads, the consensus seems to be that the diode melts from a voltage spike.
What I'm here to ask is, what does D105 do?
How does this missing component seem to not affect the engine running? (at least not majorly)
Any help would be appreciated.
As often happens when I undertake any project on the Cruiser, I end up following what I call rabbit trails; one project leads me to investigate something different, that may lead to something else completely different, again & again.
So, as I was saying, the CB install had much of the dash removed. During this process, I noticed the passenger side floor mat backing was damp. I have also been chasing down an issue with coolant consumption (or a leak). Thinking the damp mat might be a sign of a leaking heater core. Since I already had the glove box & supporting brace removed, I thought I should pull the A/C evaporator unit out (I also have another issue with that & the system is empty at the moment) so I could inspect the heater core for a leak (I had already put a UV dye in the coolant & my handy UV flashlight makes leak identification much easier). - RABBIT TRAIL #1
During the removal of the evaporator unit, I had to remove (or at least dismount) the ECM. In doing so, I noticed a rattle from the computer (as if there was a small pebble or something similar inside the case, loose. Having had the cooling unit assembly out last Summer, for replacement of the expansion valve, I seem to remember the rattle was there then too. But because I was in a hurry and it didn't seem to affect how the Cruiser ran, I left it alone.
Well, this time, I wanted to know WHAT that rattle was. So, I completely removed the computer & decided to open the case to investigate. - RABBIT TRAIL #2
Upon opening the ECM casing, out drops a small black electronic component; about the length of a pencil eraser (the pink round one that comes attached to the tip of a pencil), only slightly larger diameter. It looked like the Danny Devito of diodes, short & squatty.
Inspecting further, I found to spot with a he missing component - D105
Now, I've found a couple of threads detailing similar problems, with D105 being melted off the mounting legs. These look exactly like what I've found in mine. All of these seem to have one thing in common, they have issues with the engine dying & not starting. The kicker is, mine seems to run fine.
After reading through these threads, the consensus seems to be that the diode melts from a voltage spike.
What I'm here to ask is, what does D105 do?
How does this missing component seem to not affect the engine running? (at least not majorly)
Any help would be appreciated.
