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1991
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940 SE, 4D Sedan, AW71
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Engine Controls - Tests W/Codes
Engine Controls - Tests W/Codes
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Introduction
Self-Diagnostic Systems
Notes
Fuel Injection, Ignition & Turbo Systems
Self-Diagnostics - Fuel Injection
Notes
Fuel Injection System Diagnostics
Entering Self-Diagnostics
Notes
Control Function No. 1 (Retrieving Codes)
Control Function No. 2 (Activating Circuit Breakers)
Control Function No. 3 (Testing Fuel System Components)
Retrieving Codes
Fault Code Testing
Notes
Code 1-3-1 (Ignition System RPM Signal)
Code 1-5-4 (Egr Flow Too High)
Code 2-2-3 (Idle Valve Signal)
Code 3-1-1 (Speedometer Signal)
Code 3-1-2 (Knock/Fuel Enrichment Signal Missing)
Control Function No. 2
Activating Circuit Breakers
Control Function No. 3
Testing Fuel System Components
Diagnostic Unit Led Does Not Flash
Clearing Codes
Erasing Diagnostic System Memory
Self-Diagnostics - Ignition System
Ignition System Diagnostics
Entering Self-Diagnostics
Notes
Control Function No. 1 (Retrieving Codes)
Control Function No. 2 (Testing Impulse Sensor & Throttle Switch)
Control Function No. 3 (Testing EGR Converter - California)
Control Function No. 1
Notes
Retrieving Codes
Fault Code Testing
Notes
Code 1-4-3 (Knock Sensor Signal)
Code 1-4-4 (Fuel System ECU Load Signal)
Code 2-1-4 (Impulse Sensor Signal)
Code 2-2-4 (Coolant Temp. Signal)
Code 2-3-4 (Throttle Switch Signal)
Code 2-4-1 (EGR System)
Code 4-1-3 (EGR Temperature Sensor - NTC Type)
Control Function No. 2
Testing Impulse Sensor & Throttle Switch
Control Function No. 3
Testing EGR Converter (California)
Clearing Codes
Erasing Diagnostic System Memory
Self-Diagnostics - Turbo System
Turbo System Diagnostics
Entering Self-Diagnostics
Notes
Control Function No. 1 (Retrieving Codes)
Control Function No. 2
Control Function No. 3 (Testing Turbo System Components)
Control Function No. 1
Retrieving Codes
Fault Code Testing
Notes
Code 2-4-2 (Turbo Control Valve)
Code 3-1-2 (Knocking Detected)
Code 3-4-2 (A/C Blocking Relay)
Code 4-2-1 (Pressure Sensor Signal)
Code 4-2-3 (Throttle Position Sensor Signal)
Code 4-3-1 (Temperature Sensor Signal)
Code 4-2-4 (Load Signal)
Control Function No. 3
Testing Turbo System Components
Clearing Codes
Erasing Diagnostic System Memory
Summary