elm327 CAN 命令打开大灯附件 [英] elm327 CAN command to switch headlights pernament ON

问题描述

I want to send AT command to switch my headlights pernament ON in Nissan Leaf.

It is located in ID 625

0x00 - OFF
0x60 - ON
0x40 - Parking lights ON
0x68 - Headlights & fog lights ON

how to change this by sending commands through Terminal Can you help step by step?

解决方案

If your Nissan is talking CAN (i.e. your ELM 327 device will reply with a number between 6 and 9 when you send AT DPN), then you can:

AT Z AT E0 AT L1 AT SP 0 0100 AT SH 625

Up to here you have:

1. reset the chipset (AT Z)
2. stopped it from echoing back whatever you write (AT E0)
3. turned line endings on, so its reply doesn't overwrite your command in temrinal (AT L1)
4. set protocol to "auto" (AT SP 0)
5. initialize the bus (0100) (okay, not really, but this helps the chipset determine the protocol)
6. set the CAN message header to 625 (AT SH 625)

Now, do you know which of the bytes do you have to change to 0x40 to turn headlights on? You could try to send 40 00 directly, but I really doubt it helps.

Note: don't try to send CAN messages on the buss unless you know what you are doing. Don't hold anybody liable if your car starts acting weird. Also, don't send messages while driving.

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