Diagnosing CCM Code 41
Thread Starter
Instructor
Joined: Aug 2005
Posts: 116
Likes: 0
From: Soquel California
Diagnosing CCM Code 41
1992 6spd
Just installed rebuilt/reman CCM; now dealing with a C41
So I'm down at step#4 and I measure 36K ohms resistance,
Q1 this is considered a short right?
Q2 what is the best way to track down this short?
Thanks in advance for the help
Just installed rebuilt/reman CCM; now dealing with a C41
So I'm down at step#4 and I measure 36K ohms resistance,
Q1 this is considered a short right?
Q2 what is the best way to track down this short?
Thanks in advance for the help
Safety Car
Joined: Feb 1999
Posts: 3,504
Likes: 4
From: Mexico Beach FL
In many cases, a CCM error about "loss of serial data" turns out to be a problem with the ECM, not the CCM.
The CCM requests data from the ECM over the serial-link between them; after about three tries to get the data from the ECM without success, the CCM sets the error code.
The CCM is probably functioning properly because it is recognizing the problem.
The ECM is blissfully unaware there is a problem, even though the ECM is the problem.
The '92 and '93 ECM is notorious for this problem.
Tom Piper
The CCM requests data from the ECM over the serial-link between them; after about three tries to get the data from the ECM without success, the CCM sets the error code.
The CCM is probably functioning properly because it is recognizing the problem.
The ECM is blissfully unaware there is a problem, even though the ECM is the problem.
The '92 and '93 ECM is notorious for this problem.
Tom Piper
