Table Of Contents - Volvo 240 1989 Service Manual

Table of Contents

Table Of Contents3
Specifications4
Special Tools7
Design And Function8
Characteristics Of Lh2.4 Fuel System9
Control Unit10
Seof-Adjusting Functions10
Self-Adjusting Idle Speed Regulation10
Self-Adjusting Lambda-Song10
The Control Unit Microprocessor Receives11
Emergency Program11
The Control Unit Microprocessor11
Air Mass Meter13
Coolant Temperature Sensor13
Throttle Switch14
Lambda-Sond14
Sensors14
Catalytic Converter15
Distribution Pipe15
Fuel Pressure Regulator15
Injectors16
Cold Start Valve16
Fuel Pump16
Tank Pump (Pre-Pump)16
Fuel Filter17
Idle Valve17
Evaporative Control System (Evap)18
Reservoir (Carbon Filter)18
Evap Valve18
System Relay, Fuses18
Fuel System Diagnostics19
Fault Tracing - Repairs - Maintenance20
Fuel System Components24
Fuel System - Fault Tracing26
Control Functions27
Fault Code Key29
Erasing Diagnostic System Memory30
Start And Run Engine30
Check If New Fault Codes Have Been Stored In The Memory30
Check The Rpm Signal From The Ignition System32
Check The On/Off Function Of The Compressor32
Complete Overview Of The Fuel System34
Fuses, Ground Connections And Connectors34
Air Leaks And Throttle Shutter35
Check Throttle Switch Setting36
Check/Adjust Control Pulley And Throttle Cable36
Connect And Check/Adjust Linkarm36
Fuel Pump, Pressure Regulator And Fuel Lines (System Pressure)37
Connect Pressure Gauge37
Start Fuel Pumps37
If Fuel Pumps Don't Start37
Too High System Pressure38
Too Low System Pressure38
Check Function Of Pressure Regulator39
Turn Off Fuel Pumps39
Remove Pressure Meter39
Components, Electrical Cables40
Remove Control Unit Connector40
Remove Connector Protective Sleeve40
Check Diagnostic Socket41
Check Ignition Lock Voltage42
Check Ground Connections43
Check Lambda-Sond Screening Lead43
Check Rpm Sensor Lead From Ignition System Control Unit43
Check Throttle Switch43
Check Air Mass Meter44
Check System Relay Primary Relay44
Check System Relay Pump Relay45
Check Coolant Temperature Sensor47
Check Lead To Ac Compressor47
Check Lead From Ac Control Unit48
Check Injectors48
If The Measured Resistance Is Wrong48
Check Cold Start Valve49
Check Knock Enrichment Signal From Ignition System49
Check Idle Valve49
Check Speedometer Signal50
Automatic Transmission: Check Gear Selector Signal50
Check Lambda-Sond Current Feed And Pre-Heating Resistance50
Final Check Of Control Unit51
Connect Co Meter52
Check Lambda-Sond52
Check Burn-Off Cleaning Oil Air Mass Meter Hot Wire53
Check Co Content53
Quick Check Of Injectors54
Injectors, Fuel Distribution Pipe, Pressure Regulator, Remove/Install55
System Diagram57