Computerized vehicle failure diagnostics - Revision history

Bosanek: Added a new link

2020-12-21T15:19:33Z

Added a new link

Bosanek: Added a new link

2020-01-06T07:18:52Z

Added a new link

Bosanek: Added the article into the gen3 and gen4 electrical categories

2019-12-03T10:19:44Z

Added the article into the gen3 and gen4 electrical categories

Rhinoman at 20:18, 11 June 2019

2019-06-11T20:18:43Z

Bosanek: Added anotner link

2019-06-03T09:50:59Z

Added anotner link

Bosanek: Minor phrase correction

2019-02-27T07:51:03Z

Minor phrase correction

Bosanek: Reprocessed the article to clearly indicate which content refers to Jimnys gen3 and which refers to Jimnys gen4

2019-02-27T07:49:59Z

Reprocessed the article to clearly indicate which content refers to Jimnys gen3 and which refers to Jimnys gen4

Bosanek: Category adjustment

2019-02-21T13:39:08Z

Category adjustment

Mlines at 10:14, 21 August 2018

2018-08-21T10:14:30Z

Bosanek: Added info about SZ Viewer program

2018-05-18T12:23:29Z

Added info about SZ Viewer program

← Older revision		Revision as of 15:19, 21 December 2020
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	In the meantime, the following forum topics contain some useful info:		In the meantime, the following forum topics contain some useful info:
	* [https://www.bigjimny.com/index.php/forum/7-jimny-technical/65584-re-obd-on-the-jimny-fourth-generation-jb74-2019 Forum topic 1];		* [https://www.bigjimny.com/index.php/forum/7-jimny-technical/65584-re-obd-on-the-jimny-fourth-generation-jb74-2019 Forum topic 1];
		+	* [https://www.bigjimny.com/index.php/forum/7-jimny-technical/67204-jb74-obd2-connection Forum topic 2];
		+

← Older revision		Revision as of 07:18, 6 January 2020
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	'' The rest of this article is to be written soon ... ''		'' The rest of this article is to be written soon ... ''
		+
		+
		+	== Info specific for Jimnys 4 ==
		+
		+	{{Gen4\|}}
		+	Someone needs to write this chapter.
		+
		+	In the meantime, the following forum topics contain some useful info:
		+	* [https://www.bigjimny.com/index.php/forum/7-jimny-technical/65584-re-obd-on-the-jimny-fourth-generation-jb74-2019 Forum topic 1];

@@ Line 98: / Line 98: @@
 {{Edited}}
 [[Category:FAQ - gen3]]
 [[Category:Howto - gen3]]
 [[Category:FAQ - gen4]]
 [[Category:Howto - gen4]]

@@ Line 32: / Line 32: @@
-* Bear in mind that any vehicle manufacturer still has the right to have its own (proprietary) communication protocol in its vehicle's ECU (Electronic Control Unit) in addition to the mandated EOBD/OBD2.
+* A limitation of EOBD/OBD2 is that it is primarily intended for monitoring emissions functions. Only PIDs that are specified by J1979 are permitted. Although the number of PIDs has been greatly increased over the years it is not possible to add additional, important functions, such as Desired Idle or Injector Pulse Width.
-* The EOBD/OBD2 protocol is quite advanced and is technically sufficient to satisfy any vehicle manufacturer's needs to implement detailed and precise control and monitoring computerized mechanisms for their vehicles.
+*To provide ‘dealer level’ diagnostics manufacturers add their own ‘proprietary’ diagnostics, for example Suzuki vehicles using KWP2000 use a protocol known as KWP/SDL which utilises Modes 22 and 23 of the KWP2000 specification. Because most diagnostic tools/software only support EOBD/OBD2 mandated protocols a proprietary tool is usually required to access this data.
-** However, possibly due to certain lobbying efforts from the industry, the markets' legal requirements for usage of EOBD/OBD2 usually specify only a "crucial" / "basic" / "coarse" subset of all EOBD/OBD2 parameters and functions.
+*Suzuki vehicles supplied for regions that do not mandate EOBD/OBD2 only implement the more comprehensive ‘proprietary’ interface.
 == Diagnostics communication protocols in Jimnys ==
@@ Line 43: / Line 41: @@
 === Overview ===
 * Before around 2001, Suzuki's proprietary protocol was called SDL (Serial Data Link).
 * Since around 2001, Suzuki uses a new proprietary protocol called  SDL/KWP (KWP part stands for [https://en.wikipedia.org/wiki/Keyword_Protocol_2000 KWP2000 technology]).

← Older revision		Revision as of 09:50, 3 June 2019
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	'' The rest of this article is to be written soon ... ''		'' The rest of this article is to be written soon ... ''

		+
		+	== References ==
		+
		+
		+	Part of this article was written based on the sources below:
		+	* [http://www.rhinopower.org/diag/diag_main.html RhinoPower articles]

@@ Line 68: / Line 68: @@
 * A standard cheap computerized diagnostic solution is to use any ELM327-compatible OBD2 vehicle diagnostics protocol reader device together with any of a multitude of generic OBD2 code reading programs (made for Windows, Mac OS, Android, iOS or some other operating system).
 * Beware that this generic hardware + software equipment will provide you only the basic generic OBD2-level access to the vehicle ECU, because of Suzuki's intentional restriction.
-** Read more about this limitation in the chapter about diagnostic communication protocols in Jimnys.
+** Read more about this limitation in the previous overview subchapter of this chapter.
 ** This essentially means that some errors or engine working parameters might not be presented in proper detail or that some errors and engine working parameters might not be reported at all.
 *** A possible example: Where a generic OBD2 protocol would report just a "Glow plug circuit failure" code (so any of the four glow plugs could be defective, or even either of their power supplies could be defective instead), a proper Suzuki equipment would report "Glow plug no. 3 defective" or "Glow plug no. 2 control resistor malfunction".

@@ Line 4: / Line 4: @@
 == Introduction ==
+{{Gen3|}}{{Gen4|}}
 Jimnys, as most other vehicles built in the 21st century, have several computers which control or monitor various vehicle's systems (like the engine and engine peripherals, ABS, 4WD, instrument panel, etc.).
-As the 3rd generation Jimnys have been in production for 20 years (1998 - ongoing in 2018), Suzuki used a few different computers as well as communication protocols and interfaces throughout the years.
+As the Jimnys 3 have been in production for 20 years (1998 - 2018), Suzuki used a few different computers as well as communication protocols and interfaces throughout the years.
 Whenever a "sophisticated" issue with the vehicle occurs, using computerized diagnostics to determine the failure code is usually essential to determine the what is actually the problem.
@@ Line 16: / Line 17: @@
 == General info on computer diagnostics protocols ==
+{{Gen3|}}{{Gen4|}}
 Read [https://en.wikipedia.org/wiki/On-board_diagnostics this article] on general Wikipedia to educate yourself about various computer diagnostics protocols used in the automotive industry.
@@ Line 39: / Line 40: @@
 == Diagnostics communication protocols in Jimnys ==
+{{Gen3|}}{{Gen4|}}
 === Overview ===
 * Unfortunately, Suzuki chose to be the latter type of manufacturer (read above).
-* Suzuki's ECUs (Jimnys included) always use a proprietary communication protocol, and where an OBD2 or EOBD protocol is also present (to meet certain market's legal requirements), its functionality and parameters are limited to the legal minimum.
+* Suzuki's ECUs (Jimnys 3 included) always use a proprietary communication protocol, and where an OBD2 or EOBD protocol is also present (to meet certain market's legal requirements), its functionality and parameters are limited to the legal minimum.
 * Before around 2001, Suzuki's proprietary protocol was called SDL (Serial Data Link).
 * Since around 2001, Suzuki uses a new proprietary protocol called  SDL/KWP (KWP part stands for [https://en.wikipedia.org/wiki/Keyword_Protocol_2000 KWP2000 technology]).
@@ Line 58: / Line 59: @@
 * The ECU, when invoked like this, will flag fault codes which are mainly dealing with gross errors.
 ** The displayed fault codes are then cycled through showing multiple codes where they have been recorded, include some historic stored codes.
@@ Line 65: / Line 78: @@
 * A very smart and philanthropic Russian programmer made a program called [http://malykh.blogspot.com/2014/02/sz-viewer.html SZ Viewer].
 ** The program is specifically designed to communicate with computers in Suzuki's vehicles which use Suzuki's proprietary SDL-KWP and SDL-CAN communication protocols.
 ** The program works on Android operating system, and it is normally available from [https://play.google.com/store/apps/details?id=com.malykh.szviewer.android Google Play Store].
 * SZ Viewer is completely free to install and use, but it really deserves some donation to the programmer.

@@ Line 81: / Line 81: @@
 {{Edited}}
 [[Category:FAQ]]
-[[Category:Howto]]
+[[Category:FAQ - gen3]]

@@ Line 57: / Line 57: @@
 *** This will probably be the only diagnostic method for you if you have an early Jimny (1998 - cca 2001), or unless you pay more for the factory scan tool than your Jimny is worth.
 * The ECU, when invoked like this, will flag fault codes which are mainly dealing with gross errors.
-** The displayed fault codes usually cover only emissions related performance and only current faults can be displayed like this.
+** The displayed fault codes are then cycled through showing multiple codes where they have been recorded, include some historic stored codes.

← Older revision		Revision as of 12:23, 18 May 2018
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	* The ECU, when invoked like this, will flag fault codes which are mainly dealing with gross errors.		* The ECU, when invoked like this, will flag fault codes which are mainly dealing with gross errors.
	** The displayed fault codes usually cover only emissions related performance and only current faults can be displayed like this.		** The displayed fault codes usually cover only emissions related performance and only current faults can be displayed like this.
		+
		+
		+	=== SZ Viewer program ===
		+
		+
		+	* A very smart and philanthropic Russian programmer made a program called [http://malykh.blogspot.com/2014/02/sz-viewer.html SZ Viewer].
		+	** The program is specifically designed to communicate with computers in Suzuki's vehicles which use Suzuki's proprietary SDL-KWP and SDL-CAN communication protocols.
		+	** The program works on Android operating system, and it is normally available from [https://play.google.com/store/apps/details?id=com.malykh.szviewer.android Google Play Store].
		+	* SZ Viewer is completely free to install and use, but it really deserves some donation to the programmer.
		+	* SZ Viewer requires the use of an ELM327 v1.4+ compatible hardware transponder (with Bluetooth or Wi-Fi communication).
		+
		+
		+	* In practice, SZ Viewer can read most (and perhaps even all) Suzuki-specific diagnostic trouble codes from Suzuki vehicles' computers which otherwise require the use of original Suzuki's diagnostic tools.
		+	** Generic / ordinary hardware and software DTC scan tools can read only the limited/coarse "public" subset of OBD2 trouble codes which Suzuki enabled just to comply with legal requirements.
		+