Re:9-3 Aero Auto vert the DI/ignition cassette is a common fault - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re:9-3 Aero Auto vert the DI/ignition cassette is a common fault
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Posted by neil dale [Email] (#2111) [Profile/Gallery] (more from neil dale) on Sat, 14 Oct 2017 13:22:14 Share Post by Email
In Reply to: Re: 9-3 Aero Auto Convertible....., Bernie [Profile/Gallery] , Sat, 14 Oct 2017 12:37:46
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yes, a common fault !kind of the Achilles heel of the OG 9-3 ! so common many Saabistas'carry a spare in a padded box/bag in the trunk w/ tools to swap it out ( not hard ) = 15 minutes ?! As the man said get a genuine one ! some have bought a used OEM one on eBay or one of the MANY Saab specific FB (Facebook ) sites JOIN some if you have not already! Most guys on FB, the saabistas ' are honest! mine( the DCI / cassette is the original and is fine even after 15 years ! some have dreamed of making a better coil fix ( and a few have used GM corvette coils for the later 9-3 ) but the Saab system is complicated and you would need an electrical engineer to re-engineer it ! People are rather cowardly to not change it! / improve it, make something better The forums are full of the multitudinous, piteous lamentations, bewailings of the failed DCI / cassette unit! Yet, True subscribers to the cult, they subscribe magical, mystical powers to it and think it almost a sacred object! ( and the Saab Trionic system ) If you have the temerity , suggest, even different spark plugs( other than NGK ) you will be met w/ a howl of hostile irrational protest claiming" it won't work, will damage the motor, etc " "the Saab was designed for NGK plugs only" (supposedly !- mayhaps it was indeed ! yet some have used different plugs successfully which is some level of proof that they CAN (and ARE used )! the different spark plugs may NOT interfere w/ the signal of ion current measured by the spark plugs )We suspect those blinded to the truth will eventually "see" and the deaf to new ideas will eventually" hear!" Even Helen Keller learned to TALK! And another complication, the KNOCK sensor is incorporated into the ignition system which provides feedback to the system ) we are researching for an article about the Saab system and are trying to locate a development engineer, formula 1 race driver in New Zealand that was involved in the initial R&D You can read all about the trionic system on Wikipedia : Regards, neil 10-13-2017
Trionic
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Trionic is an innovative engine management system developed by Saab Automobile, consisting of an engine control unit (ECU) that controls 3 engine aspects:
Ignition timing,
Fuel injection
Acts as a boost controller.
Hence the numerical prefix 'tri-' in Trionic. 'Ion' comes from the fact that it uses ion current measured by the spark plugs between combustion events as a sensor for knock, misfire and synchronization detection. With the ion sensing system, the ion current stream developed due to combustion can be deduced by monitoring the secondary current of the ignition coil. Using the value and wave shape of the current, after the actual spark event, the quality of the actual combustion process is determined, thus allowing the engine control unit to optimize the timing of the spark for the best engine performance while keeping emissions low on a much wider range of rpms.
Since Trionic 7, the throttle and thereby the air charge is electronically controlled, but the name "Trionic" was not changed accordingly.
Contents
[hide]
1History
2Models and ECU information
3Projects/Aftermarket (Non OEM) tuning
4Glossary
5References
6External links

History[edit]
The SAAB Trionic engine management system was developed for the 9000 and 'New Generation' 900 turbocharged engines. The engine management system was first utilized on the Saab B204 and B234 "H" engines to monitor and control the fuel injection system and turbocharging pressure control.
The Trionic 5.2 and 5.5 systems utilized the manifold absolute pressure MAP sensor and the intake air charge temperature sensor to calculate the fuel injection curves, while the Trionic 7 and 8 systems are mass air flow type. The two have substantial differences that prevent utilization of components between the two. Generally speaking, engine tuners prefer the easier to work with Trionic 5 systems over the Trionic 7 and 8 which are more restrictive in what can be manipulated in the software.
The intellectual rights to the Trionic 5 and 7 systems were sold to BAIC, along with the Saab H Engine that it was designed for, in 2009 as part of Saab's restructuring and transfer of ownership from General Motors to Spyker.
Models and ECU information[edit]
Trionic T5.2 Trionic T5.5 Trionic 7 Trionic 8
Released 1993 1994 1998 2003
Processor MC 68332 MC 68332 MC YQQCU MC 68377
User ROM 128 kB 256 kB 512 kB 2048 kB
Features TCS/ETC Optional TCS/ETC Optional /intake heatplate Optional 98-99 Does not use TCS on four cylinder models,
optional on 00-02 four cylinder models ??
Generally speaking, Trionic systems are shortened to indicate which version they are, e.g. T5, T7, T8, etc. The engines with T5 had red direct ignition modules which differentiate them visually from the T7 models which had a black ignition module. The ignition module on both T5 and T7 are an integral ignition coil and electronics that plugs directly onto the spark plugs without the use of spark plug wires that are typically used on most engines.
SAAB Models Utilizing Trionic Engine Management System:
2nd Generation 900 ("NG900") 1994-1998 - T5
9000 1994-1998 - T5
1st Generation 9-3 1998 - T5 (Except Viggen, which is T7)
1st Generation 9-3 2000 to 2002 - T7
1st Generation 9-5 1998-2010 4Cyl - T7
2nd Generation 9-3 2003 to 2011 4cyl - T8
Projects/Aftermarket (Non OEM) tuning[edit]
Many people around the world are working on reverse engineering the Trionic engine management system, by way of various open source communities. The work involves understanding the binary files stored in the ECU itself, and what changes affect the car's hardware and operation of the vehicle. The T5, T7 and T8 management systems have been successfully manipulated to allow self-tuning for enthusiasts.
There also some alternative options in the way of interceptors like # Unichip that clamp the various inputs to the standard management systems, but they are restricted by the fact that fuel delivery generally cannot be easily increased as manipulation of the air-flow meter input and/or aggressive modifying of the ignition timing causes the Check Engine Light (CEL) to illuminate easily due to a deviation between the expected and targeted torque and quality of emissions. It is therefore common to increase the fuel pressure across the board by using an aftermarket fuel pressure regulator when tuning is performed by these interceptor computers, and trim the fuel out instead. However, increased fuel pressure has the side-effect of affecting the engine's ability to idle due to injector lockup, and as such sometimes an alternative solution of additional injectors instead of a raised-fuel-pressure regulator is proposed. The number of cars with such complex requirements is very low, and in general a full aftermarket engine management system is used in these cases, such as Nira or MoTeC.
Glossary[edit]
Sources include: Engine management system SAAB Trionic T5.5[1]
APC, Automatic Performance Control
CDM, Combustion Detection Module
ECU, Engine control unit
EGT, Exhaust gas temperature
ETC, Electronic throttle control
MAP, Manifold Absolute Pressure
MIU, Main Instrument Unit
ORVR, On board Refuelling Vapour Recovery system
PWM, Pulse width modulation
SID, Saab Information Display
TCS, Traction control system
TPS, Throttle position sensor
TWICE, Theft Warning Integrated Central Electronics
VSS, Vehicle Speed Sensor
WOT, Wide Open Throttle
References[edit]
Jump up^ Engine management system SAAB TRIONIC T5.5
External links[edit]
ecuproject.com, Formerly a Community dedicated to giving Trionic power to the people!This site is no longer online. Founded by Andrew J. Weaver and Steven A. Hayes and supported by the global SAAB community.
trionictuning.com, Community-driven exploration and development of new trionic features, supported by the global SAAB community.

->Posting last edited on Sat, 14 Oct 2017 13:48:56.

_______________________________________ viggen02


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