Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSAAB1995900 S, 2D HATCHBACK, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 20 (TESTS W/ CODES 2.5L V6)
1995 Saab 900 S, 2D Hatchback, Automatic
Section 20 (Tests W/ Codes 2.5L V6)
1995 Saab 900 S, 2D Hatchback, AutomaticSECTION Section 20 (Tests W/ Codes 2.5L V6)
WARNING: This page is about a different variant/trim than selected.
- General information
- SAE J1930 terminology
- Testing for continuity/shorting
- PWM measurement
- Simplified use of the ISAT
- Diagnostic fault codes adapted to new legal requirements
- MOTRONIC 2.8.1 control module
- Intake air temperature sensor
- Mass air flow sensor
- Throttle position sensor
- Idle air control valve (IAC)
- Coolant temperature sensor
- Ignition coils
- Spark plugs
- Crankshaft position sensor
- Camshaft position sensor
- Knock sensors
- Oxygen sensors 1 and 2
- Injectors
- Canister Purge (CP) valve
- Fuel pressure regulator
- Secondary air injection pump
- Fuel pump
- Special Tools
- Technical description
- The MOTRONIC 2.8.1 Engine Management System
- MOTRONIC 2.8.1 - system description
- Main components of the MOTRONIC system
- Ignition system
- Knock control
- Fuel injection
- Starter motor cranking
- Idling control
- Secondary air injection (SE only)
- Principle of operation
- Control Module Inputs
- Principle Of Operation, Control Module Outputs
- Principle Of Operation, Control Module
- Principle Of Operation, Control Module Power Supply
- Principle Of Operation, Control Module Grounding Points
- Principle Of Operation, Diagnostics
- Principle Of Operation, CHECK ENGINE Lamp
- Principle Of Operation, Mass Air Flow Sensor
- Principle Of Operation, Throttle Position
- Principle Of Operation, Idle Air Control
- Principle Of Operation, Coolant Temperature
- Principle Of Operation, Intake Air Temperature
- Principle Of Operation, Fuel Injection
- Principle Of Operation, Ignition Spark/Triggering
- Principle Of Operation, Engine Speed
- Principle Of Operation, Camshaft Position
- Principle Of Operation, Knock Control
- Principle Of Operation, Lambda Control
- Principle Of Operation, Fuel Evaporation
- Principle Of Operation, Relays
- Principle Of Operation, Speed Signal
- Principle Of Operation, Idling Compensation
- Principle Of Operation, Torque Reduction (Automatic Transmission)
- Principle Of Operation, TCS Active (Full Load Disconnection)
- Fault diagnosis
- Diagnostic trouble code table, MOTRONIC 2.8.1
- MOTRONIC functions without diagnostic trouble codes
- Test readings, control module connections
- Lamp flash codes
- New command code system
- "INITIATE" command menu
- MOTRONIC fault diagnosis schedule
- Notes
- Points To Note When Diagnosing Faults
- DTC P0102, P0103: Mass Air Flow Sensor, Input To Control Module Low/High
- DTC P0112, P0113: Intake Air Temperature Sensor, Input To Control Module Low/High
- DTC P0117, P0118: Coolant Temperature Sensor, Input To Control Module Low/High
- DTC P0122, P0123: Throttle Position Sensor, Input To Control Module Low/High
- DTC P0131, P0132, P0134: Oxygen Sensor 1 For Cyl. 1-3-5 (Rear), Input To Control Module Low/High
- DTC P0151, P0152, P0154: Oxygen Sensor For Cyl. 2-4-6 (Front), Input To Control Module Low/High
- DTC P0171, P0172: Adaptation Too Lean Or Too Rich, Rear Cylinder Row (Cyl. 1-3-5)
- DTC P0174, P0175: Adaptation Too Lean Or Too Rich, Front Cylinder Row (Cyl. 2- 4-6)
- DTC P0322, P0336: Crankshaft Position Sensor, Input To Control Module Incorrect Or Absent
- DTC P0326: Knock Sensor For Cyl. 1-3-5, Input To Control Module
- DTC P0331: Knock Sensor For Cyl. 2-4-6, Input To Control Module
- DTC P0342, P0343: Camshaft Position Sensor, Input To Control Module Low/High
- DTC P1206, P1207 (SE Only): Secondary Air Injection Relay, Output From Control Module Low/High
- DTC P1001, P1002: EVAP Canister Purge Valve, Output From Control Module Too Low/High
- DTC P1011, P1012: Injector 1, Output From Control Module Low/High
- DTC P1021, P1022: Injector 2, Output From Control Module Low/High
- DTC P1031, P1032: Injector 3, Output From Control Module Low/High
- DTC P1041, P1042: Injector 4, Output From Control Module Low/High
- DTC P1051, P1052: Injector 5, Output From Control Module Low/High
- DTC P1061, P1062: Injector 6, Output From Control Module Low/High
- DTC P1500: Battery Voltage Too High Or Too Low
- DTC P1211, P1212: Idle Air Control Valve (IAC), Output From Control Module Low/High
- DTC P1251, P1252: CHECK ENGINE Lamp (MIL), Output From Control Module Low/High
- DTC P1300, P1301: Torque Limitation, Signal Low Or Too Long
- DTC P1621, P1622: A/C Relay, Output From Control Module Low/High
- DTC P0605: Control Module Fault
- DTC P1560, P1561: TCS Active (Test Signal), Signal Low/High
- DTC P1631, P1632: Fuel Pump Relay, Output From Control Module Low/High
- Ignition Coil
- Main Relay
- D/R Input (Automatic Transmission)
- Speed Signal
- Throttle Position Information Sent To The TCS And AF22 Control Modules
- Engine RPM Signal To MIU, TCS And AF22 Control Modules
- Before control module replacement
- Handling control modules
- Adjustment/replacement of components
- Control module
- Mass air flow sensor and temperature sensor, intake air
- Coolant temperature sensor
- Camshaft position sensor
- Crankshaft position sensor
- Throttle position sensor
- EVAP canister purge valve
- Idle air control (IAC) valve
- Injectors
- Checking injector flow capacity
- Throttle body
- Knock sensors
- Oxygen sensors
- Secondary air injection components
- Connectors and grounding points
- Wiring Diagrams
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.