CAN or J1850-10.4? -
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Unread 03-13-2008, 05:05 PM   #1
Registered User
2007 MK Patriot 
Join Date: Nov 2007
Location: Newport, ME
Posts: 9
CAN or J1850-10.4?

I'm thinking of buying a code reader. I want something that will cover the stable:

2000 Honda Civic (ISO 9141)
2001 Kia Sportage (ISO 9141)
2007 Patriot Limited ??

I need to know what protocol the Jeep is. Anyone know?

wrightrandy is offline   Reply With Quote
Unread 03-19-2008, 06:11 PM   #2
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Join Date: Jul 2005
Location: Vermont
Posts: 284
Some stuff from 'the book' - 07 patriot

The dominant nodes on the CAN-C bus are the TIPM and the Powertrain Control Module (PCM).

There are actually three separate CAN bus systems used in the vehicle. They are designated: the CAN-B, the CAN-C and the Diagnostic CAN-C. The CAN-B and CAN-C systems provide on-board communication between all nodes in the vehicle. The CAN-C is the faster of the two systems providing near real-time communication (500 Kbps), but is less fault tolerant than the CAN-B system. The CAN-C is used typically for communications between more critical nodes, while the slower (83.3 Kbps), but more fault tolerant CAN-B system is used for communications between less critical nodes. The CAN-B fault tolerance comes from its ability to revert to a single wire communication mode if there is a fault in the bus wiring.

The Diagnostic CAN-C bus is also capable of 500 Kbps communication, and is sometimes informally referred to as the CAN-D system to differentiate it from the other high speed CAN-C bus. The Diagnostic CAN-C is used exclusively for the transmission of diagnostic information between the Totally Integrated Power Module/Central GateWay (TIPM or TIPMCGW) and a diagnostic scan tool connected to the industry-standard 16-way Data Link Connector (DLC) located beneath the instrument panel on the driver side of the vehicle.
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