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Control module

Control module


Saab Trionic controls principally


• ignition (performed by the ignition discharge module)

• fuel injection (sequential)

• boost pressure (via a solenoid valve)


The Trionic control module has a 70-pin connector and is located by the right-hand A-pillar. When removing the powertrain, the control module connector and cable must be extracted through the bulkhead.

The control module contains a 32-bit processor that can perform 2 million calculations per second.

A number of sensors provide the control module with information that is processed using matrices stored in the control module after optimizing the engine operation. Ignition timing, fuel and boost pressure are examples of these matrices.

The control module is programmed specifically for the engine variant in question and must be used only for this engine in the Saab 9-3.

The control module can be damaged by electrostatic discharges or short circuits on any of its outputs. It is therefore essential that great care be taken when handling the control module, during fault diagnosis with BOB for example.

The control module is powered continuously with +30 and will lose any adapted values and diagnostic trouble codes stored in its memory if this supply is terminated.

The control module is adapted for a voltage of between 8-16V when the car is being driven.

When the ignition is turned on, the control module will be activated and the CHECK ENGINE lamp will go on for a functional check. The control module will then await impulses from the crankshaft position sensor.

The principal quantity to be measured for fuel injection is provided by the manifold absolute pressure sensor.

Substitute functions are available for all the sensors except the crankshaft position sensor.

After the ignition has been turned off, all the sensors supplied with 5 V will remain active for 15 minutes. Diagnosis can still be performed with the diagnostic tool during this time. After 15 minutes, only the memory will be active. Adapted values are stored in the memory.

Adaptation is essential to performance, driveability, fuel consumption and emissions. Therefore, the control module must never be removed unnecessarily or be de-energized in any other way.



Important

The Saab Trionic control module has different part numbers for cars with manual gearbox and automatic transmission respectively.


Diagnosis


• If the control module program memory ROM or working memory RAM is defective, diagnostic trouble code P0605 will be generated.