Okay, so I have a newly installed Digifiz in my 1990 GLI 2L 16v. It is a CE2 specific Digifiz.
For purposes of troubleshooting, please treat the Digifiz as a 1989 16v Cluster!
For the Digifiz, the coolant gauge functions two ways, to display coolant temperature, and to warn of low coolant level.
However, ever since I first installed it, the guage has been blinking LIKE CRAZY. Which under normal operations indicates an overheating temperature. But the engine is not overheating at all.
Also, when the coolant is low in level, the display also flashes. But the flashing does not occur across the entire gauge. The temperature of the coolant can flash when the coolant is low.
I have followed a Post-89 Digifiz Guide that I have in testing and what not.
Here is what it had to say about the coolant gauge (it's originally in French, but here is google translate's version):
I have also followed the testing procedures as described by the Bentley manual. I grounded the coolant temperature sensor wire. But the coolant did not rise gradually as described above. Instead, the entire gauge began to blink.Originally Posted by Le Digifiz
I am at a complete loss of what to do.
I attempted to direct wire it. I made a bridge from the coolant temp sensor wire to the wire going to the Digifiz which in this case is U1/11 (see wiring table below). Here are pictures of that.
Here is the tap which is connected to wire G2/3 (yellow/red):
Here is the other side of the tap which is connected to U1/11 (yellow/red):
That didn't fix it either!
Then I went on and tested continuity.
I started with checking that there was signal going from the engine bay sensor to G2/3. Below is the value I got:
Then I went on to test if my bridge was getting voltage. Below is the value I got for that:
Next was to check voltage at U1/11. Here is that value:
Finally, I decided to check voltage at U2/09 which is the low coolant sensor wire. Here is the value I got for that:
To MAKE SURE! This is the Coolant Temperature Sensor on a 16v right??
To end, here is the wiring table according to Le Digifiz. Again, translated by google translate:
Originally Posted by Le Digifiz