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docs: update Canbus_Support2

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dazq 2020-12-16 20:22:04 +00:00 committed by Josh Stewart
parent 89a8689976
commit 18cc3c056d
1 changed files with 3 additions and 42 deletions
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Canbus_Support2.md
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@ -2,7 +2,7 @@
title: CanBus Support2
description:
published: true
date: 2020-12-16T20:17:28.918Z
date: 2020-12-16T20:21:56.089Z
tags:
editor: markdown
dateCreated: 2020-12-15T21:58:51.731Z
@ -72,45 +72,10 @@ The following PIDs are supports by by the OBD port
When using Bit-Encoded-Notation, quantities like C4 means bit 4 from data byte C. Each bit is numerated from 0 to 7, so 7 is the most significant bit and 0 is the least significant bit (See below).
![bit_notation.png](/bit_notation.png)
![bit_notation1.png](/bit_notation1.png)
#### MODE 01
PID(hex) PID(Dec) Data bytes returned Description Min value Max value Units Formula[a]
00 0 4 PIDs supported [01 - 20] Bit encoded [A7..D0] == [PID $01..PID $20] See below
05 5 1 Engine coolant temperature
0B 11 1 Intake manifold absolute pressure
0C 12 2 Engine speed 0 16,383.75 rpm 256 A + B 4 {\displaystyle {\frac {256A+B}{4}}} {\displaystyle {\frac {256A+B}{4}}}
0D 13 1 Vehicle speed 0 255 km/h A {\displaystyle A} A
0E 14 1 Timing advance -64 63.5 ° before TDC A 2 − 64 {\displaystyle {\frac {A}{2}}-64} {\displaystyle {\frac {A}{2}}-64}
0F 15 1 Intake air temperature -40 215 °C A − 40 {\displaystyle A-40} {\displaystyle A-40}
11 17 1 Throttle position 0 100 % 100 255 A {\displaystyle {\tfrac {100}{255}}A} {\displaystyle {\tfrac {100}{255}}A}
19 25 2 Oxygen Sensor 6 A: Voltage
B: Short term fuel trim 0 -100
1C 28 1 OBD standards this vehicle conforms to 1 250 - enumerated. See below
20 32 4 PIDs supported [21 - 40] Bit encoded [A7..D0] == [PID $21..PID $40] See below
22 34 2 Fuel Rail Pressure (relative to manifold vacuum) 0 5177.265 kPa 0.079 ( 256 A + B ) {\displaystyle 0.079(256A+B)} {\displaystyle 0.079(256A+B)}
24 36 4 Oxygen Sensor 1
AB: Air-Fuel Equivalence Ratio (lambda,λ)
CD: Voltage
25 37 4 Oxygen Sensor 2
AB: Air-Fuel Equivalence Ratio (lambda,λ)
CD: Voltage
33 51 1 Absolute Barometric Pressure 0 255 kPa A {\displaystyle A} A
40 64 4 PIDs supported [41 - 60] Bit encoded [A7..D0] == [PID $41..PID $60] See below
42 66 2 Control module voltage 0 65.535 V 256 A + B 1000 {\displaystyle {\frac {256A+B}{1000}}} {\displaystyle {\frac {256A+B}{1000}}}
46 70 1 Ambient air temperature -40 215 °C A − 40 {\displaystyle A-40} {\displaystyle A-40}
52 82 1 Ethanol fuel % 0 100 % 100 255 A {\displaystyle {\tfrac {100}{255}}A} {\displaystyle {\tfrac {100}{255}}A}
5C 92 1 Engine oil temperature -40 210 °C A − 40 {\displaystyle A-40} {\displaystyle A-40}
60 96 4 PIDs supported [61 - 80] Bit encoded [A7..D0] == [PID $61..PID $80] See below
#### Bitwise encoded PIDs
@ -121,11 +86,7 @@ A request for this PID returns 4 bytes of data (Big-endian). Each bit, from MSB
For example, if the car response is BE1FA813, it can be decoded like this:
Hexadecimal B | E | 1 | F | A | 8 | 1 | 3
Binary 1 0 1 1 | 1 1 1 0 | 0 0 0 1 | 1 1 1 1 | 1 0 1 0 | 1 0 0 0 | 0 0 0 1 | 0 0 1 1
Supported? Yes No Yes Yes | Yes Yes Yes No | No No No Yes | Yes Yes Yes Yes |Yes No Yes No | Yes No No No | No No No Yes| No No Yes Yes
PID number 01 02 03 04 | 05 06 07 08 | 09 0A 0B 0C| 0D 0E 0F 10 | 11 12 13 14 | 15 16 17 18 | 19 1A 1B 1C | 1D 1E 1F 20
![bit_encoded1.png](/bit_encoded1.png)
So, supported PIDs are: 01, 03, 04, 05, 06, 07, 0C, 0D, 0E, 0F, 10, 11, 13, 15, 1C, 1F and 20