Update E24-SEFMJ-white-civic-si.md
This commit is contained in:
parent
f58ac77b16
commit
0c66b624b4
|
@ -1,10 +1,30 @@
|
||||||
|
|
||||||
|
# General Context
|
||||||
|
|
||||||
SEFMJ Honda protocol running 9600 K-line communication between 2004 Honda ECU and multiplex module within body control unit / cabin fuse box.
|
SEFMJ Honda protocol running 9600 K-line communication between 2004 Honda ECU and multiplex module within body control unit / cabin fuse box.
|
||||||
|
|
||||||
|
Some packets are sent my BCM some packets are sent by ECU. Assumption is that BCM is master thus first packet in the cycle is coming from BCM.
|
||||||
|
|
||||||
|
![image](https://user-images.githubusercontent.com/48498823/224524802-0bbde452-66a4-43b7-95c5-b523dc23cb63.png)
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
Byte packets are clearly CRC-terminated, for instance 0x140 is crc of 1,0,0 packet
|
||||||
|
|
||||||
|
![image](https://user-images.githubusercontent.com/48498823/224524734-9c9ed54d-0ecd-4aa1-a46e-3e1f9ce53acb.png)
|
||||||
|
|
||||||
|
|
||||||
|
# Problem statement
|
||||||
|
|
||||||
* ECU seem to be reporting CLT temperature to BDM and eventually for dash board / instrument cluster
|
* ECU seem to be reporting CLT temperature to BDM and eventually for dash board / instrument cluster
|
||||||
|
|
||||||
* BDM seem to be reporting state of A/C request button to ECU
|
* BDM seem to be reporting state of A/C request button to ECU
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
# What we have
|
||||||
|
|
||||||
E24-SEFMJ-white-civic-si-logicdata.zip has all the raw data as saleae https://support.saleae.com/logic-software/legacy-software/older-software-releases files
|
E24-SEFMJ-white-civic-si-logicdata.zip has all the raw data as saleae https://support.saleae.com/logic-software/legacy-software/older-software-releases files
|
||||||
|
|
||||||
|
|
||||||
|
@ -16,4 +36,4 @@ E24-SEFMJ-white-civic-si-csv.zip has same data exported as timestamp,byte value
|
||||||
6-high-rpm idle at around 2K RPM hoping for CLT to go up
|
6-high-rpm idle at around 2K RPM hoping for CLT to go up
|
||||||
|
|
||||||
|
|
||||||
7-ac-on-off pressing/depressing A/C button a few times
|
7-ac-on-off pressing/depressing A/C button a few times
|
||||||
|
|
Loading…
Reference in New Issue