Passat (B6) :: ECM Disconnected With Ignition On
Feb 14, 2012
I recently tried to replace my heater blower resistor, whilst looking for this under the glovebox I disconnected the ECM (convenience system electronic control module) with the ignition switched on.
I quickly realized that the heater blower resistor was not located within the ECM box, but when I reconnected it the following warning lights appeared on the dash:-
1. Electro-mechanical steering assistance light. Amber color lit continuously.
2. Fault in the parking brake system. Amber color flashing.
The steering is not as it was, it will not return automatically after cornering. The parking brake works fine.
I've bought a Haynes manual and section that covers the replacement of the ECM states, "ensure the ignition is switched off". Unfortunately this eludes to the fact that I have damaged something, but does not diagnose the problem.
My thoughts are that I have blown a fuse or the ECM by disconnecting and reconnecting it with the ignition on. The ECM units are expensive, and I do not want to replace it if the problem is a simple blown fuse.
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