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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 04-05-2010, 03:41 PM
msingh83 msingh83 is offline
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Code p1720

anyone knows about this code p1720
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  #2  
Old 04-05-2010, 05:00 PM
TechFreak TechFreak is offline
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P1720 129 CAN Timeout Control Module ?
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Last edited by TechFreak; 04-05-2010 at 05:03 PM.
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Old 04-06-2010, 09:17 AM
msingh83 msingh83 is offline
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what is CAN Timeout Control Module?
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Old 04-06-2010, 10:17 AM
TechFreak TechFreak is offline
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Local CAN bus

The CAN bus (Controller Area Network) is a serial bus system, in which all connected stations are equally entitled, i.e. each control unit can both send as well as receive. In other words, the connected control units can "communicate" and exchange information via the lines.

Due to the linear structure of the network, the bus system is fully available for all other stations in the event of one station failing. The connection consists of two data lines (LOCAN_L and LOCAN_H).

The local CAN bus exists independently of the familiar CAN bus. The local CAN bus serves only engine functions. The data exchange across the Local CAN bus takes place between the following control units, depending on the engine variant:

DME control unit

Valvetronic control unit

HDEV control unit


The connected control units must all have the same CAN status. The CAN status can be checked via the diagnosis interface. The CAN status (bus index) is specified on the identification of the relevant control unit connected to the CAN bus



I'm guessing one of the three Control Units above failed to boot up properly.
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Old 04-08-2010, 07:31 PM
msingh83 msingh83 is offline
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thank-you
where is moudul located?
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