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Old 09-25-2012, 08:41 PM   #263
Kabigon
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What I Drive: 2012 sterling gray Titanium

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Quote:
Originally Posted by oritpro View Post
Out of curiosity, why on earth would the IPC act as a gateway between the APIM and HVAC module?
There are 3 can buses: HS-CAN (High Speed), MS-CAN (Medium Speed), and I-CAN (Infotainment).

There are 2 gateway modules: BCM (HS-CAN <> MS-CAN) and the IPC (MS-CAN <> I-CAN).

The service manual is very clear that the IPC is used as a gateway for communication between the APIM and the HVAC.

However, I don't know exactly why it was done this way considering that the APIM is the only module in the car that is connected to all 3 buses directly.
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