Questions tagged [obd]

An acronym; On Board Diagnostics.

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1answer
550 views

OBD-II or CANopen

I am relatively new to CAN Bus and been doing some research on a new system we have to develop that monitors a mobile compressor. This compressor is towed behind a truck, or sometimes left at the ...
2
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2answers
5k views

How do I disconnect my OBD port from my lower dashboard?

I am going to be checking my OBD port on my 2004 Subaru WRX for loose pins. The problem is that access to my OBD is uncomfortable at best (it's below knee level and pointed down). Even if I can ...
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0answers
30 views

CAN Signals on OBDII

What CAN messages & signals are freely accessible through OBD-II? Can manufacturer close certain signals or only propretary ones? I know all CAN signals can be accessed but not interpreted ...
3
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1answer
4k views

OBD-II Mode and PIDs specifically used for Electric vehicles?

I am working on developing a vehicle CAN communications protocol being implemented in an electric vehicle. I was wondering if anyone knew if there is a standard MODE and PID for OBD-II messages ...
1
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1answer
100 views

When connecting diagnostic PC to OBD port - What is the most detailed output file?

When the garage connecting the "official" manufacturer software to the OBD port in the car - What is the most detailed file that can be retrieved, containing all the raw data information? Thanks,
2
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0answers
694 views

1995 GM OBD transitional 1.5 scan tool [closed]

I have had a 1995 Pontiac SSEi for 2 years without a code reader but now want to buy one. From the previous discussions I have read, there seems to be no available and affordable scan tool. Has anyone ...
2
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0answers
742 views

Catalyst Temperature

Please refer to Catalyst Temperature PIDs (mode 01 pids 3C, 3D, 3E, 3F) for the following questions - https://en.wikipedia.org/wiki/OBD-II_PIDs#Mode_01 Q1. Is there a thumb rule that the catalyst ...
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0answers
1k views

Calculate Intake Manifold Absolute Pressure from MAF Engine using OBD Data

I need to calculate Intake Manifold Absolute Pressure from OBD Data. I have Toyota Corolla GLI 2010 Model. This car has MAF engine which does not return Intake Manifold Absolute Pressure. Where'as I ...
3
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0answers
52 views

Less than specified bytes of data from OBD

0100 (https://en.wikipedia.org/wiki/OBD-II_PIDs#Mode_1_PID_00) should provide 4 bytes of data. But there has been cases, like Audi A4 2.0 TDI, where the data from 0100 was less than 4 bytes. So is the ...
4
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1answer
2k views

OBD MIL commanded status and DTC stored

OBD-II Mode 01 PID 0 gives commanded MIL on (bit A7, see link) and Number of confirmed emissions-related DTCs (bit A6-A0, see link). I did hit Mode 01 PID 01 on a few cars but got surprising results. ...
2
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0answers
1k views

What is the difference between Toyota GTS and TIS software?

I've found two types of Toyota OEM software available. One is the GTS ( Global Tech Stream ) software which is freely available from Toyota's EU site. The other is the Toyota TIS ( Technical ...
3
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1answer
665 views

Mode 01 PID 01 OBD-II

https://en.wikipedia.org/wiki/OBD-II_PIDs#Mode_1_PID_01 Mode 01 PID 01 - Monitor status since DTCs cleared. In the 1st chart, B7 is 'Reserved' and must be 0. But for a few cars (like Skoda Rapid) ...
2
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2answers
898 views

Emission performance of a vehicle using OBD

The California Air Resource Board uses OBD scanner for emission testing. (https://www.arb.ca.gov/msprog/obdprog/obdprog.htm) In other places like India, 'tail pipe exhaust gas analyse' method is ...
5
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1answer
183 views

Relation of VIN of a car with emission norms of a country it is sold

A VIN of a car determines the country of manufacture. So if a car has a VIN of Canada (CARB emission standard) and is sold in India (BS-IV emission standard), will the car comply with BS-IV standards? ...
1
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1answer
824 views

Duplicate OBD code - or reading it wrong?

'94 Grand Cherokee 5.2L, TBI. Has OBD, not OBD-II. The Check Engine Light came on after 10-15 mins running. Checked error codes using the ignition key method, wondering if I'm reading the flashes ...
3
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0answers
295 views

SilLabs OBDscan can't connect to Alfa 147: latency too high!

I have an OBD Scan tools built around the Silicon Labs CP210x chipset, but I can't get it to connect to my car at all. When I connect the scan tool to my laptop USB port I have a driver installed and ...
5
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0answers
1k views

Difference between FMS and OBD

What is the difference between FMS and OBD. Whether OBD is a standard or protocol. Recently I am working on a GPS device to tap the CAN bus in order to integrate with our fleet management system. In ...
3
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0answers
439 views

2005 Impala OBD2 not working right

I have a 2005 Chevrolet Impala (Base trim, 3.4L) and I recently purchased a cheap OBD2 Bluetooth reader. Unfortunately, Torque (Android app) isn't able to read data from this transmitter when ...
2
votes
1answer
708 views

What does the OBD error code P0100 mean?

What does the OBD error code P0100 mean? I have an engine misfire with the check engine light on in my Nissan N16 Supper Saloon -1300cc - 2000 model year. The engine started to produce less power. An ...
5
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3answers
7k views

Mode 02 - Freeze frame data use

I got some data on sending 0202 command (Mode $02, PID 02). It is the freeze frame data. I don't understand why does anyone need the data? Do anyone (including mechanics) ever open Freeze frame data? ...
2
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1answer
179 views

Fault code decoding

I tried getting mode 03 (fault code) for Volkswagen Polo and Toyota Innova. I am unable to find how to decode it. Can someone please help me decode it (the method to decode the hex response) Volvo: ...
4
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0answers
301 views

CAN data for Mahindra

I bought a new Mahindra Scorpio S10 and have been trying to read the CAN bus using ELM 327 Bluetooth OBD and Putty. Configurations in Putty: Baud Rate 9600 (tried 115200 also), Data bits: 10, Stop ...

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