3

i plugged elm327 mini(bluetooth) to my car(peugeot 3008)

when i have tested some commands, i found not ordinary response.

ATZ
ELM327 v2.1
ATSP0
OK
ATDP0
ISO 15765-4 (CAN 11/500)
ATE0
OK
ATL0
OK
0100
SEARCHING...\r4100983BA011\r1: 06410080000010\r\r>

by OBD-II PIDs, i thought "0100" means "PIDs support[01-20]" and return 4 data bytes. but i received more than 4 bytes (multi-line like CAN style was displayed)

does OBD-II specification is wrong? or i am missing something?

p.s "0101" also returns more than 4 data bytes (using multiline)

410100040000\r1: 0641010006E000\r2: 0041010006E000\r3: 0041010006E000\r4: 03618D6106E000\r\r>
DeockJin Chung
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2 Answers2

3

You are getting responses from multiple ECUs
If you want to get their addresses then do

ath1
0100

ath1 turn on header, 0100 queries for a resonse
you will get the response like:

7E8064100983BA011
7E906410080000010

the first one (7E8) is from the engine, the 2nd (7E9) is from the transmission.
If you just want to hear from the engine alone run

atsh7e0

for transmission, if available do

atsh7e1
godzilla
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2

Your vehicle or OBD simulator has returned responses from two possible ECUs. The "4100983BA011" is from the first and "410080000010" from the second.

Send the command again, but use ATH1 before sending 0100 and you will see the CAN ID of the source addresses of the ECUs sending their responses to your diagnostics tool.

obdkey
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