Civil Engineering Reference
In-Depth Information
Table 4.12
11-bit
legislated OBD/WWH-OBD CAN identifiers
CAN identifier
Description
0 × 7DF CAN identifier for functionally addressed request messages sent by external
test equipment
0 × 7E0 Physical request CAN identifier from external test equipment to ECU #1
0 × 7E8 Physical response CAN identifier from ECU #1 to external test equipment
0 × 7E1 Physical request CAN identifier from external test equipment to ECU #2
0 × 7E9 Physical response CAN identifier from ECU #2 to external test equipment
0 × 7E2 Physical request CAN identifier from external test equipment to ECU #3
0 × 7EA Physical response CAN identifier from ECU #3 to external test equipment
0 × 7E3 Physical request CAN identifier from external test equipment to ECU #4
0 × 7EB Physical response CAN identifier ECU #4 to the external test equipment
0 × 7E4 Physical request CAN identifier from external test equipment to ECU #5
0 × 7EC Physical response CAN identifier from ECU #5 to external test equipment
0 × 7E5 Physical request CAN identifier from external test equipment to ECU #6
0 × 7ED Physical response CAN identifier from ECU #6 to external test equipment
0 × 7E6 Physical request CAN identifier from external test equipment to ECU #7
0 × 7EE Physical response CAN identifier from ECU #7 to external test equipment
0 × 7E7 Physical request CAN identifier from external test equipment to ECU #8
0 × 7EF Physical response CAN identifier from ECU #8 to external test equipment
While not required for current implementations, it is strongly recommended (and may be
required by applicable legislation) that for future implementations the following 11-bit CAN
identifier assignments be used:
0 × 7E0/0 × 7E8 for engine control module (ECM)
0 × 7E1/0 × 7E9 fo
r transmission control module (TCM)
Table 4.13
Summary of 29-bit CAN identifier format—normal fixed addressing
CAN-Id ID bit position
28
24
23
16
15
8
7
0
Functional CAN IDId 0 × 18 0xDB TA SA
Physical CAN IDId 0 × 18 0xDA TA SA
Note: The CAN identifier values given in this table use the default value for the priority informa-
tion in accordance with ISO 15765-2
4.3.2
UDSonCAN—ISO 14229-3
As mentioned earlier, UDSonCAN is originally based on ISO 15765-3. The revi-
sion of ISO 15765-3 currently under work at ISO will be published as ISO 14229-
3. The reason for the renumbering of the well-established standard in the automo-
tive industry is based on the fact that ISO 14229-1 UDS shall be implemented
on many different protocols and data links (CAN, FlexRay, Internet Protocol,
K-Line, etc.) according to the OSI model. Fig.
4.23
illustrates the implementation
concept of UDS.
ISO 14229-1 UDS specifies the DMs in a protocol-independent manner. This
document is currently under revision by the ISO TC22/SC2/WG1/TF5 diagnostic
requirements task force. All lessons learnt and implementation feedback from sys-
tem suppliers, vehicle manufacturers and tool suppliers is under implementation.
