Battery Control Module on Negative Lead

[spike47]

2011 Tiguan FWD, 2ltr Diesel.
Hi
Getting a error code for over voltage, Battery module is suspect, but how can I test it ?.
Have removed plug to it and ran the engine, done a scan and the error is not showing, would that suggest the the Battery Control Module has a fault ?.




"
00447 - Function Limitation due to Over-Voltage
001 - Upper Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 6
Fault Frequency: 1
Reset counter: 83
Mileage: 189907 km
Time Indication: 0
Date: 2063.14.31
Time: 13:52:58


Freeze Frame:
Term 15 On
Voltage: 14.85 V
ON
ON
ON
OFF
OFF
cheers
Spike

[DV52]

@spike47: Hi.

First - let's look at the wiring diagram for the Battery Control Module on this car - which is called J367:


As you can see - the 2 x pin connector on J367 connects the module to J533 and to a fuse. J533 is what a diagnostic device calls the (CAN) Gateway module - I suspect this is the module from which the SCAN snippet in your post was copied.

Notice in my picture that I show the term "LIN bus". LIN is short for Local Interconnect Network - it's a low-speed, single-wire (as depicted in my diagram) communication protocol. In a LIN set-up there is a LIN master (in this case J533) and a number of LIN slaves (in this case the Alternator and J367).

When you removed the 2 x pin connector from J367 (shown as T2 in my diagram) - surely the SCAN would have reported that J533 was no longer able to talk to J367?

So, I can't answer your question because you have removed valuable data from your SCAN report and only posted a sub section of the diagnostic information. I'm not sure why folk keep doing this - maybe it's because they don't want to complicate their posts. However, there are many ways to read a SCAN report and the major advantage of a full report is that it gives the fault information context about the way that the ENTIRE car is built

If you want to pursue this matter - post-up the FULL (meaning not edited) SCAN with the 2 x pin connector plugged into J367 (please). Again, don't edit ANY part of the report

Don