VCDS 805.4 CCM no response - fix

Jettascuba

Veteran Member
Joined
May 27, 2009
Location
South Africa
TDI
2002 VW Jetta
Hi, I was working on repairing my hood and door microswitches yesterday and using VCDS to check their statuses.

Initially I could scan the CCM, but the second (and next 20 times) I got no response from the CCM.

This morning I disconnected the battery and shorted the terminals (to discharge module power supply filter capacitors) to solve a CCM latch-up situation (all I could think of)... it worked. Though I am still getting "intermittant communication" as a DTC. Am satisfied. This solution was proposed by Uwe Ross in answer to another thread.

BTW: running fully licenced/activated VCDS 805.4, HEX USB+CAN cable bought from Hex-Diagnostics, South Africa (Rosstech agent) on a Dell Latitude D630 under Windows Vista Professional.
 

MOGolf

Top Post Dawg
Joined
Jun 27, 2001
Location
underneath something
TDI
2001 Golf GLS TDI Reflex silver, rough road suspension and steel skid plate, 2004 Passat Variant, Candy White, rough road suspension and geared balanced shaft module, and much, much more. 2016 LR RR HSE TD6, 2019 Jaguar I-PACE
CCMs can be rebooted by the easier method of pulling the fuse for a few seconds. On the A4 platform cars that's fuse 14.
 
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