Zdouble
Active Member
Hey guys picked up a second hand hex can and when I run the test on my b6 S4 it says K1 ok
K2 ok
can Not Ready.
Need help please.
K2 ok
can Not Ready.
Need help please.
Can not ready
- Thread starter Zdouble
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Please post a picture of the HEX-CAN showing the label on it, and also a screen shot of the test result.
That's entirely normal on a B6. It doesn't do diagnostics via CAN, it's strictly K-lines for diagnostic communications.
-Uwe-
Zdouble
Active Member
Zdouble
Active Member
Ok , so does that mean I can't access long coding with my car?
Zdouble
Active Member
Ya I don't know why they're coming up so small
There's no long coding in any module of a B6 A4. They all use old-school regular coding.
-Uwe-
Zdouble
Active Member
It's an S4 but that doesn't make a difference I guess. I'm just trying to turn off cold diagnostics for some of the bulbs on my car I've changed to LED's. Is that possible to do without long coding available?
At most on the fog lights. LEDs weren't really a thing yet when the systems in B6 were designed.
Post an Auto-Scan so we can see how yours is equipped.
-Uwe-
Zdouble
Active Member
Ok guess I just have to hope that the led bulbs flickering when I turn the key on doesn't kill them too fast.
Thanks for your help I appreciate it.
Thanks for your help I appreciate it.
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Have you fitted resistors in parallel with the LEDs?
BTW I have owned a B6 A4 TDI, 2 different B6 S4s and a B7 RS4 - the modules in them were definitely "old school" and low tech compared to current vehicles - not surprising when you remember that the B6 was designed in the previous millennium and the B7 was little more than a mid-life upgrade.
Zdouble
Active Member
Ya some have built in resistors, others I installed so I have no bulb out warning. They just flicker when you turn the key on which is what I wanted to stop by turning off cold diagnostics.
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Sounds like the resistors have a fractionally too high resistance which isn't cleanly "fooling" the cold diagnostics. Remember the resistors will get very hot when the bulbs are on, so mount them somewhere appropriate.
Zdouble
Active Member
No I don't think you can stop the flickering no matter which ohm resistors you use it happens when the computer sends the signal to test to make sure if each bulb is not burned out.
Zdouble
Active Member
Let me rephrase it it's actually a strobe effect not flickering. The ecu sends out a few pulses to check the bulbs, it looks cool but Apparently it kills the LEDs quicker.
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The pulses IIRC are at reduced voltage (so incandescent bulbs don't generate anything visible).
As an electronics engineer of over 40 years I fail to understand why these pulses would "kill" LEDs
Zdouble
Active Member
If they don't than thats great! Thanks
Agreed. The brightness of LEDs has traditionally been modulated using PWM techniques, and I've never heard of that affecting them in a negative way.As an electronics engineer of over 40 years I fail to understand why these pulses would "kill" LEDs
-Uwe-