T= Turbo I= Naturally Aspirated AIC = Automatic Idle Control AMM= Air Mass Meter ELCD= Electronically Controlled Purge Valve=EVAP LH=Luftmassenmesser Hitzdraht (Hot Wire) Lambda=Feedback System from O2 Sensor to Adjust Fuel Mixture ( ALL US Cars) MAP=Manifold Absolute Pressure Sensor APC=Automatic Performance Control ISAT= Intelligent Saab Tester ( Scan Tool) TECH II=Scan Tool
Trionic and Motronic Systems are Sequential Port Fuel injection systems, meaning they fire each injector individually from the others.
All LH systems are simultaneous fire ( fire all injectors at the same time)
Year/Model Ignition System Turbo Control Fuel Injection Identifying Characteristics Read Fuel Injection Fault Codes 85-88 900T 85-88 9000T 2.0L Hall Effect Distributor APC (Automatic Performance Control) Knock Sensor LH 2.2 Lambda 3 Pin AIC Valve Cadmium Colored Plug in AMM Throttle Position Switch Mechanical EVAP valve Manual Trans have Upshift Light Switch (Blue capped vacuum switch) Only With LH Tester (2.2 LH Tool) No Fault Code Memory in ECU ISAT or Pulse Ratio Meter To Set CO via connector at fresh air intake on 900, at left hood hinge on 9000 86-87 900S 87 9000S 2.0L EZK Hall Effect Distributor Knock Sensor N/A LH 2.2 Lambda 3 Pin AIC Valve Cadmium Colored Plug in AMM Throttle Position Switch ( Click at closed throttle. ON/OFF Switch) Mechanical EVAP valve Manual Trans have Upshift Light Switch (Blue capped vacuum switch) Only With LH Tester (2.2 LH Tool) No Fault Code Memory in ECU ISAT or Pulse Ratio Meter To Set CO via connector at fresh air intake on 900, at left hood hinge on 9000 89-90 900 88-90 900S 88-90.5 9000S 2.0L EZK Hall Effect Crank Sensor Distributor Knock Sensor N/A LH 2.4 Lambda 2 Pin AIC Valve Silver Colored No Plug In AMM ELCD ( Electrical) EVAP valve Throttle Position Switch ( Click at closed throttle. ON/OFF Switch) No Overboost Switch Injector Cut Off on Deceleration No Upshift Vacuum Switch Adaptive System for Idle and Fuel Mixture, learns and adjusts Read Codes via Check Engine Light Using Test Connector at Fresh Air Intake On 88 900s via connector at Left Hinge of the Hood on Bulkhead on 9000s On 89 up cars, 900 Convertible had connector under the boot in front of the shifter. Other 900s had it under rear seat on the Right side ISAT 89-93 900T 94 900 Convertible 89-89.5 9000T 2.0L Hall Effect Distributor APC Knock Sensor LH 2.4 Lambda 2 Pin AIC Valve Silver Colored No Plug In AMM ELCD ( Electrical) EVAP valve Throttle Position Switch ( Click at closed throttle. ON/OFF Switch) No Overboost Switch Injector Cut Off on Deceleration No Upshift Vacuum Switch Adaptive System for Idle and Fuel Mixture, learns and adjusts Read Codes via Check Engine Light Using Test Connector at Fresh Air Intake On 88 900s via connector at Left Hinge of the Hood on Bulkhead on 9000s On 89 up cars, 900 Convertible had connector under the boot in front of the shifter. Other 900s had it under rear seat on the Right side ISAT 89.5-90 9000T 2.0L Direct Ignition (DI/APC) Hall Effect Crank Sensor Knock Sensor DI/APC Pressure Transducer LH 2.4 Lambda 2 Pin AIC Valve Silver Colored No Plug In AMM ELCD ( Electrical) EVAP valve Throttle Position Switch ( Click at closed throttle. ON/OFF Switch) No Overboost Switch Injector Cut Off on Deceleration No Upshift Vacuum Switch No Distributor Adaptive System for Idle and Fuel Mixture, learns and adjusts Read Codes via Check Engine Light Using Test Connector at Fresh Air Intake On 88 900s via connector at Left Hinge of the Hood on Bulkhead on 9000s On 89 up cars, 900 Convertible had connector under the boot in front of the shifter. (Pin 2) Other 900s had it under rear seat on the Right side (Pin 2) ISAT 90.5 9000S 2.3L Direct Ignition Hall Effect Crank Sensor Knock Sensor N/A LH 2.4.1 Lambda Same As 2.4 except A/C Compressor Control Inside LH ECU and Communication between LH ECU and DI ECU Injector Cut Off on Deceleration No Upshift Vacuum Switch No Distributor Adaptive System for Idle and Fuel Mixture, learns and adjusts Read Codes via Check Engine Light Using Test Connector at Left Hinge of the Hood on Bulkhead ISAT 91-93 9000 I 2.3L Direct Ignition Hall Effect Crank Sensor N/A LH 2.4.2 Lambda 3 Pin Larger AIC Valve (buzzes with key on) No Plug In AMM No Distributor Injector Cut Off on Deceleration No Upshift Vacuum Switch ELCD EVAP valve Throttle Potentiometer ECU controls A/C Compressor Adaptive System for Idle and Fuel Mixture, learns and adjusts Read Codes via Check Engine Light Using Test Connector at Left Hinge of the Hood on Bulkhead ISAT TECH II 91-92 9000T 2.3L Direct Ignition (DI/APC) Hall Effect Crank Sensor Knock Sensor DI/APC No Pressure Transducer No Overboost Switch Adapt Max Boost by Jumping Throttle Sensors Pins 1&2 No Max Boost without Full Throttle LH 2.4.2 Lambda No Plug In AMM No Distributor ELCD EVAP valve Injector Cut Off on Deceleration No Upshift Vacuum Switch Intake Air Temp Sensor Throttle Potentiometer ECU controls A/C Compressor Adaptive System for Idle and Fuel Mixture, learns and adjusts Read Codes via Check Engine Light Using Test Connector at Left Hinge of the Hood on Bulkhead ISAT TECH II 91 900S Convertible 2.0L EZK Hall Effect Crank Sensor Knock Sensor N/A LH 2.4 Lambda Same as older 2.4 Read Codes via Check Engine Light Using test Connector Under Boot In Front Of Shifter ( Pin 2) ISAT 91-93 900S 2.1L EZK Hall Effect Crank Sensor Knock Sensor N/A LH 2.4.2 Lambda 3 Pin Larger AIC Valve (buzzes with key on) No Plug In AMM No Upshift Vacuum Switch ELCD EVAP valve Injector Cut Off on Deceleration Throttle Potentiometer ECU controls A/C Compressor Adaptive System for Idle and Fuel Mixture, learns and adjusts Read Codes Via Check Engine Light Using Test Connector Under Rear Seat (Pin 2) ISAT TECH II 93-> 9000T 2.3L Trionic Crank Sensor Trionic No Knock Detector No Overboost Switch Max Boost Adapted with Full Throttle Trionic Sequential Fuel Injection Lambda 3 Wire Black APC Solenoid No AMM MAP Sensor Intake Air Temp Sensor Aimed Twin Jet Injectors Adaptive System for Idle and Fuel Mixture, learns and adjusts 93 had Check Engine Light Code Capability. Leave Key ON for 6 sec. ISAT TECH II 94 9000 I 2.3L Trionic Crank Sensor N/A Trionic Sequential Fuel Injection Lambda No AMM MAP Sensor Intake Air Temp Sensor Aimed Twin Jet Injectors Adaptive System for Idle and Fuel Mixture, learns and adjusts ISAT TECH II 95-> 9000S 2.3L LPT Trionic Crank Sensor Low Pressure Turbo. Wastegate Trionic Sequential Fuel Injection Lambda No AMM MAP Sensor Intake Air Temp Sensor Aimed Twin Jet Injectors Wired for APC Solenoid Adaptive System for Idle and Fuel Mixture, learns and adjusts ISAT TECH II 95 9000 I 3.0L V6 Motronic 2.8.1 Distributor less Electronic Ignition Coil Packs with Plug Wires Knock Sensor N/A Motronic 2.8.1 Lambda Sequential injection Variable Length Manifold Runners (Engine Speed Dependent) ISAT TECH II NG 900 900S 94-> 2.0L 2.3L Motronic 2.10.2 Distributor Hall Effect Cam Sensor Crank Sensor Knock Sensor N/A Motronic 2.10.2 Lambda Sequential Injection Secondary Air Injection AMM ISAT TECH II NG 900T 2.0L 2.3L Trionic Trionic Trionic Lambda ISAT TECH II NG 900 SE 2.5L V6 Motronic 2.8.1 Distributor less Electronic Ignition Coil Packs with Plug Wires Knock Sensor N/A Motronic 2.8.1 Lambda Sequential Fuel Injection ISAT TECH II
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