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Automobile
900 Convertible
Service manual
Saab 900 Service Manual
2:3 fuel system, injection engine
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Table Of Contents
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Contents
Table of Contents
Bookmarks
Table of Contents
Table of Contents
Units
Market Codes
Technical Data
Fuel System, B201 Engine Pressure
Control Pressure Regulator
Control Pressure, Cold Engine
Injectors
Mass Air Flow Sensor
Tightening Torques
Fuel Booster
Fuel Tank and Pump
Pressure Regulator - Checking Values
Temperature Sensor
Auxiliary Air Valve
Idle Air Control Valve
Full-Load Enrichment
Lambda Sensor
Fuel Pump
Summary of LH Components
Specifications, Fuel Injection System (with a Catalytic Converter)
Specifications, Fuel Injection System (Without a Catalytic Converter)
Other LH Components
Lucas Components
Other Lucas Components
Setting of Idling Speed
CO Values and Idling Speeds, Engine at Operating Temperature
Pulse Ratio/Rpm
Special Tools
Technical Description Contents
Fuel System General
Injection Engine
Fuel System (Not US)
Fuel Tank and Fuel Pump
Fuel Tank with Pressurized Receiver
Fuel Accumulator
Fuel Filter
Fuel Distributor
Pressure Regulating Valve
Line Pressure Regulator
Warm-Up Regulator
Regulation of Control Pressure
Fuel Booster Valve
Thermostatic Time Switch
Air Induction System
Air Cleaner
Rubber Duct Connector
Throttle Body
Lambda Sensor Regulated Fuel System
Catalytic Converter
Modulating Valve
Location of Modulating Valve
Frequency of 70 Hz
Summary
Fuel Enrichment
Fuel Enrichment System 1981-83
Cold-Start Function
Hot-Start Function
Acceleration Enrichment
Fuel Booster Pressure Switch
Electrical Functions: Engine Cold
Electrical Functions: Engine Hot
Fuel Enrichment System 1984
Starting System
Acceleration System
Connecting Pins on the P11 Relay
Fuel Boosting System
Turbo Engines Without BPC
The Control System Consist of
Heavy Load
Full Throttle
Turbo Engines with BPC, 1982
Full-Load Enrichment, 1988
Over-Reving Limiter for Turbo Engines
LH Fuel Injection System, B202 Injection Engine
Fuel Injection System, EU (1984)
Fuel Injection System (with Catalytic Converter)
Principle of Operation
LH 2.4 Fuel Injection System
LH 2.4.2 Fuel Injection System
Components
Fuel Tank
Fuel Tank Venting and Overfill Protection
Fuel Pump, EU (1984)
Fuel Pump (with Catalytic Converter, 1988)
Fuel Pump, 900I/S16 (1989)
Fuel Tank and Fuel Pump, 900 Turbo (1990)
Fuel Pump (1990)
Fuel Pressure Regulator
Fuel Injection Manifold
Throttle Position Switch
Throttle Position Sensor (1991)
Idle Air Control (IAC) Valve (LH 2.2)
IAC Valve with Integral Limp-Home Function (LH 2.4)
IAC Valve, LH 2.4.2 (M1991)
Adaptive Idling Control System (LH 2.4)
Temperature Sensor (NTC Resistor)
LH Control Module (LH 2.2)
Control Module with Expanded Memory (LH 2.4)
Control Module (LH 2.4.2)
Adaptive Lambda System (LH 2.4)
Integrated Deceleration Function (LH 2.4)
Shift-Up Indication
Evaporative-Loss Control Device (LH 2.4)
Integrated Fault-Diagnosis System
Integrated Pressure Sensor
Preheating
Preheater Valve Function Check (1985)
Fuel System
Feed Pump Function Check (1988)
Changing the Fuel Pump (1988)
Changing the Non-Return Valve for the Fuel Pump
Fuel Pump, Without Feed Pump (Not Catalytic Converter Cars)
To Change the Non-Return Valve
Fuel Pump 900/S16 (1989)
Checking the Fuel Pump
Changing the Fuel Pump
Fuel Pump, Removal and Fitting
To Replace the Fuel Pump Filter
Fuel Pump Filter
To Replace the Fuel Pump Reservoir
To Replace the Ejector Pump
Ejector Pump
Cleaning the Ejector Pump
Fuel Pump, Turbo (1990)
Fuel Tank and Fuel Lines
To Remove
To Fit
Fuel Lines
Fuel Line Runs
Checking the Fuel Lines
Checking the Fuel Line Connections
Replacing Fuel Lines Inside the Car
Replacing Banjo Fitting on Fuel Line
Making a Fuel Line Fitting Tool
Fuel Level Transmitter
To Change the Fuel Level Transmitter
Replacing the Roll-Over Valve
Fuel Injection System Contents
Checking/Adjustment
Fuel Leakage
Air Leakage
Mass Air Flow Sensor Lever Mounting
Mass Air Flow Sensor Plate Clearance
Mass Air Flow Sensor Plate Rest Position
Fuel Pump Capacity
Voltage Across the Fuel Pump
Injectors - Performance and Sealing
Cold-Start Valve - Performance and Sealing
Checking Pressures
Control Pressure: Engine Cold
Control Pressure: Engine Hot
Line Pressure
In the Case of Insufficient Line Pressure
In Case of Excessive Line Pressure
Leakage Tests on the Whole System
Adjusting the Line Pressure
Idling Adjustment
Setting Idling Speed
Adjusting the CO Content
Connection of Exhaust Extraction Equipment
Setting the Fuel-Air Mixture (with a Catalytic Converter)
Setting a New Mass Air Flow Sensor
Checking Fuel Enrichment Turbo, 1982 (Not BPC)
Checking the Residual Pressure
Checking Fuel Enrichment, Turbo BPC (1982)
Checking the Operation of the Warm-Up Regulator
Adjustig the Throttle Butterfly Stop
Fault Diagnosis, CI System
Starting Trouble: Engine Cold
Starting Trouble: Engine Hot
Poor Running During the Warm-Up Period
Poor Running, Engine Hot
Poor Performance, Low Top Speed
Excessive Fuel Consumption
Erratic CO Content and Idling Speed, Hard to Adjust
Replacing the Air Cleaner Filter Element
Mixture Control Unit
Lever, Adjustment Arm and Sensor Plate
Injectors - to Replace
Injectors - to Clean
Warm-Up Regulator - to Replace
Auxiliary Air Valve - to Replace
Fuel Filter - to Replace
CI Fuel Injection System, EU (US Specification)
Fuel Shut-Off on Deceleration (1987)
Vacuum Valve - Principle of Operation
Fuel Shut off System
Throttle Position Switch, Normally Aspirated Engines
Closing Function
Dual Function
Thermostatic Switch 45/38 C and Thermostatic Time Switch
Thermostatic Switch 25/18
Normally Aspired Engines
Turbo Engines
Lambda Control Module
Terminal Pins - Lambda Control Module
Time Relay P11
Time Function - 3 Seconds
Relay P11 Terminal Pins
Deceleration Relay, Normally Aspirated Engines
Terminal Pins
Deceleration Relay
Speed Relay
Speed Relay Terminal Pins
Turbo Cars, Model Year 1988 and Later
Electrical System - Principle of Operation
CI System
Lambda
Component Locations
Checking
Checking the Lambda System
Checking the Lambda Sensor's Signal Level
Fault Diagnosis Chart, CI System (EU)
Fault Symptoms
Starting with Cold Engine, below 45 C
Fuel Enrichment Via the Cold-Start Valve and Control Module
Fault Diagnosis (Electrical Testing)
Fuel Enrichment Via the Cold-Start Valve
Fuel Enrichment During the Warm-Up Period, below 45 C
Fuel Enrichment up to 140 Seconds after Starting
Deceleration Function (900I with Manual Gearbox)
Enrichment at Engine Speeds above 3800 Rpm
Fuel Enrichment Governed by Pulse Ratio
Setting the Fuel-Air Mixture
Fuel Injection System, LH (B202, B212 Engines) Contents
Safety Precautions for the LH System
Colour Codes
Fault Diagnosis with LH System Tester, LH 2.2 and LH 2.4
Before Starting Work
Fault Diagnosis Work - General Procedure
Fault Codes: LH 2.2 (25-Pin Connector)
Fault Codes: LH 2.4 (35-Pin Connector)
Fault Diagnosis Chart: LH 2.2
Fault Diagnosis Chart: LH 2.4
Fault Diagnosis Using the Integrated Fault-Diagnosis System
Faults Stored in the Memory
Component and Signal Testing
Fault Diagnosis - Stored Faults
Fault Code
Next Fault Code
To Restart the Test Procedure
To Clear the Memory
LH 2.4 Fault Codes (M1989)
LH 2.4 Fault Codes (M1990)
Occasional (Intermittent) Faults
Table for Component and Signal Testing
Fault Diagnosis with an ISAT, LH 2.4 (M1990)
Before Starting Fault Diagnosis
Is the Fault in the LH System?
Fault Diagnosis Using an ISAT
Diagnosis
Test Readings on the Control Module Connector
Checking the Wiring
How Are the Results Displayed on the ISAT?
Fault Codes: LH 2.4 M1990, ISAT
Fault Diagnosis Chart, LH 2.4 (M1990), ISAT
Control Commands - LH 2.4 (M1990), ISAT
Fault Diagnosis with the ISAT (M1991)
LH 2.4.2 Control Module Connections, Test Data
Differences in Test Data, Control Module Connections
Fault Diagnosis, LH 2.4 and LH 2.4.2
Fault Diagnosis Using the ISAT
Additional Fault Codes and Command Codes
Something to Remember
Breakout Box
ISAT Command Codes
Fault Codes - LH 2.4 and LH 2.4.2
Command Codes LH 2.4 and LH 2.4.2
Fault Diagnosis Chart, LH 2.4 and LH 2.4.2
Fault Codes 2/42241, 2/42251, 2/42252, 2/42291
Malfunction Indicated
Test Procedures
Fault Codes 2/42440, 2/42441, 2/42442, 2/42450, 2/42451, 2/42452
Fault Codes 2/42460, 2/42491, 2/42492
Fault Code 2/44221
Fault Code 2/44261
Fault Code 2/45641, 2/45651, 2/45691
Fault Code 2/45723
Fault Code 2/45771, 2/45772
Test Procedure, LH 2.4
Fault Codes 2/46221, 2/46271
Electronic EGR
Background
Cars Concerned
Action
Fault Code 5/38121
Fault Code 5/38321
Test Procedure, LH 2.4
Fault Code 5/38371
Fault Codes 3/58322, 3/58372, 3/58382
Fault Diagnosis Chart for Manual Diagnosis, LH 2.2
Key to Quick-Reference Chart
Engine Fails to Start
Engine Starts but Stops Immediately
Erratic Idling
Poor Throttle Response
Engine Runs Erratically at All Speeds
Engine Cannot Attain Maximum Revs
CO Content too Low or too High
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