612699
2
Zoom out
Zoom in
Previous page
1/94
Next page
ELM327
Elm Electronics – Circuits for the Hobbyist
www.elmelectronics.com
2 of 94
ELM327DSJ
Contents
The Basics Description................................................................................... 1
Features.......................................................................................1
Applications..................................................................................1
Block Diagram..............................................................................1
Connection Diagram.................................................................... 1
Pin Descriptions........................................................................... 4
Unused Pins.................................................................................6
Absolute Maximum Ratings......................................................... 6
Electrical Characteristics..............................................................7
Using the ELM327 Overview...................................................................................... 8
Communicating with the ELM327................................................ 8
AT Commands........................................................................... 10
AT Command Summary.............................................................10
AT Command Descriptions........................................................ 12
Reading the Battery Voltage...................................................... 29
OBD Commands........................................................................30
Talking to the Vehicle.................................................................31
Bus Initiation...............................................................................33
Interpreting Trouble Codes........................................................ 34
Resetting Trouble Codes........................................................... 35
Quick Guide for Reading Trouble Codes................................... 35
Selecting Protocols.................................................................... 36
OBD Message Formats..............................................................38
Setting the Headers................................................................... 39
Multiline Responses...................................................................42
CAN Message Types................................................................. 44
Multiple PID Requests................................................................45
Response Pending Messages................................................... 45
CAN Receive Filtering - the CRA command.............................. 46
Using the CAN Mask and Filter..................................................47
Monitoring the Bus..................................................................... 48
Restoring Order..........................................................................49
Advanced Features Using Higher RS232 Baud Rates...............................................50
Setting Timeouts - the AT ST and AT AT Commands............... 52
SAE J1939 Messages................................................................53
Using J1939............................................................................... 55
The FMS Standard.....................................................................58
The NMEA 2000 Standard.........................................................59
Periodic (Wakeup) Messages.................................................... 59
Altering Flow Control Messages................................................ 60
Using CAN Extended Addresses............................................... 61
CAN Input Frequency Matching.................................................62
2


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Elm 327 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Elm 327 in the language / languages: English as an attachment in your email.

The manual is 0,23 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info