420SEL W126 V8-4.2L M116 (1986): Powertrain Management
Also for this vehicle: 400E (124.034) V8-4.2L (119.975) (1992), 400SEL (140.043) V8-4.2L (119.971) (1993).
Diagnostics
Maintenance
Engine
Transmission
Brakes
Electrical
Steering & suspension
Heating & A/C
Body & interior
Choose Sections to see everything in a chapter, or a chapter title to start at its first page.
Relays and Modules - Powertrain Management54 pages
Relays and Modules - Computers and Control Systems34 pages
- Acceleration Enrichment Module › Component Information › Testing and Inspection
Engine Control Module › Component Information26 pages
Technical Service Bulletins6 pages
- Customer Interest: › DD07.3-87101 › Oct › 87 › Computers - Engine Surges Down Hills
All Technical Service Bulletins for Engine Control Module:3 pages
All Other Service Bulletins for Engine Control Module:2 pages
- Locations › Electronic Ignition Control Unit (EZL)234567
- Diagrams › Diagram Information and Instructions23456789
- Testing and Inspection › Diagnostic Trouble Code Descriptions234
- Main Relay (Computer/Fuel System) › Component Information › Locations23
- Overvoltage Protection Relay › Component Information › Technical Service Bulletins › Overvoltage Relay/Harness - Update234
- Relays and Modules - Emission Control Systems › Air Injection Pump Relay › Component Information › Locations23
Relays and Modules - Ignition System › Ignition Control Module › Component Information3 pages
Sensors and Switches - Powertrain Management65 pages
Sensors and Switches - Computers and Control Systems38 pages
- Accelerator Pedal Position Sensor › Component Information › Locations
Air Flow Meter/Sensor › Component Information9 pages
- Altitude Correction Sensor <--> [Barometric Pressure Sensor] › Component Information › Description and Operation234
Crankshaft Position Sensor › Component Information3 pages
- Engine Speed Sensor › Component Information › Locations
- Fuel Level Sensor › Component Information › Locations
- Intake Air Temperature Sensor › Component Information › Locations
- Oil Pressure Sensor › Component Information › Locations
Oxygen Sensor › Component Information8 pages
- Vehicle Speed Sensor › Component Information › Locations2
- Sensors and Switches - Emission Control Systems › EGR Temperature Sensor › Component Information › Locations
Sensors and Switches - Fuel Delivery and Air Induction22 pages
- Accelerator Pedal Position Sensor › Component Information › Locations
- Accelerator Pedal Switch › Component Information › Technical Service Bulletins › Uneven Idle Speed With Transmission in Gear23
Air Flow Meter/Sensor › Component Information9 pages
- Fuel Pressure Sensor/Switch › Component Information › Locations
- Thermo Time Switch › Component Information › Locations
Sensors and Switches - Ignition System4 pages
Crankshaft Position Sensor › Component Information3 pages
- Ignition Switch › Ignition Switch Lock Cylinder › Component Information › Service and Repair
Tune-up and Engine Performance Checks58 pages
- Fuel Pressure › System Information › Technical Service Bulletins › Fuel - CIS/CIS-E Fuel Pressure Tester2
- Air/Fuel Mixture › System Information › Adjustments
- Air Cleaner Housing › Air Filter Element › Component Information › Service and Repair
- Fuel Filter › Component Information › Description and Operation2
- Firing Order › Component Information › Specifications
- Ignition Cable › Component Information › Technical Service Bulletins › Ignition System - Wires with Crimp-On terminals2
Spark Plug › Component Information14 pages
Technical Service Bulletins10 pages
- Customer Interest: › 15_003B › Jun › 86 › Ignition - Updated Heat Ranges for Spark Plugs
All Technical Service Bulletins for Spark Plug:5 pages
All Other Service Bulletins for Spark Plug:4 pages
- Specifications › Spark Plug Gap2
- Tools and Equipment › Spark Plug Pliers - AST Tool # H 18492
Computers and Control Systems157 pages
- Acceleration Enrichment Module › Component Information › Testing and Inspection
- Accelerator Pedal Position Sensor › Component Information › Locations
Air Flow Meter/Sensor › Component Information9 pages
- Intake Air Temperature Sensor › Component Information › Locations
- Auxiliary Air Valve (Idle Speed) › Component Information › Locations2
- Altitude Correction Sensor <--> [Barometric Pressure Sensor] › Component Information › Description and Operation234
Crankshaft Position Sensor › Component Information3 pages
- Diagnostic Socket <--> [Data Link Connector] › Component Information › Locations
- EGR Backpressure Transducer › Component Information › Locations
Engine Control Module › Component Information26 pages
Technical Service Bulletins6 pages
- Customer Interest: › DD07.3-87101 › Oct › 87 › Computers - Engine Surges Down Hills
All Technical Service Bulletins for Engine Control Module:3 pages
All Other Service Bulletins for Engine Control Module:2 pages
- Locations › Electronic Ignition Control Unit (EZL)234567
- Diagrams › Diagram Information and Instructions23456789
- Testing and Inspection › Diagnostic Trouble Code Descriptions234
- Engine Speed Sensor › Component Information › Locations
- Frequency Valve, CIS Fuel Injection › Component Information › Locations
- Fuel Level Sensor › Component Information › Locations
Idle Speed/Throttle Actuator - Electronic › Component Information5 pages
- Information Bus › Component Information › Testing and Inspection › Diagnostic Trouble Code Descriptions
- Main Relay (Computer/Fuel System) › Component Information › Locations23
- Oxygen Sensor Warning Light <--> [Malfunction Indicator Lamp] › Component Information › Locations2
- Oil Pressure Sensor › Component Information › Locations
- Overvoltage Protection Relay › Component Information › Technical Service Bulletins › Overvoltage Relay/Harness - Update234
Oxygen Sensor › Component Information8 pages
Relays and Modules - Computers and Control Systems34 pages
- Acceleration Enrichment Module › Component Information › Testing and Inspection
Engine Control Module › Component Information26 pages
Technical Service Bulletins6 pages
- Customer Interest: › DD07.3-87101 › Oct › 87 › Computers - Engine Surges Down Hills
All Technical Service Bulletins for Engine Control Module:3 pages
All Other Service Bulletins for Engine Control Module:2 pages
- Locations › Electronic Ignition Control Unit (EZL)234567
- Diagrams › Diagram Information and Instructions23456789
- Testing and Inspection › Diagnostic Trouble Code Descriptions234
- Main Relay (Computer/Fuel System) › Component Information › Locations23
- Overvoltage Protection Relay › Component Information › Technical Service Bulletins › Overvoltage Relay/Harness - Update234
Sensors and Switches - Computers and Control Systems38 pages
- Accelerator Pedal Position Sensor › Component Information › Locations
Air Flow Meter/Sensor › Component Information9 pages
- Altitude Correction Sensor <--> [Barometric Pressure Sensor] › Component Information › Description and Operation234
Crankshaft Position Sensor › Component Information3 pages
- Engine Speed Sensor › Component Information › Locations
- Fuel Level Sensor › Component Information › Locations
- Intake Air Temperature Sensor › Component Information › Locations
- Oil Pressure Sensor › Component Information › Locations
Oxygen Sensor › Component Information8 pages
- Vehicle Speed Sensor › Component Information › Locations2
- Vehicle Speed Sensor › Component Information › Locations2
Emission Control Systems24 pages
Air Injection10 pages
- Air Injection Vacuum Control Solenoid Valve › Component Information › Locations
- Air Injection Pump › Component Information › Locations234
- Air Injection Pump Clutch › Component Information › Locations › Electromagnetic Air Injection Pump Clutch2
- Air Injection Pump Relay › Component Information › Locations23
- Catalytic Converter › Catalyst Shield › Component Information › Technical Service Bulletins › Excessive Heat in R.F. Footwell Area
- Evaporative Emissions System › System Information › Diagrams234
- Positive Crankcase Ventilation › Component Information › Description and Operation
- Relays and Modules - Emission Control Systems › Air Injection Pump Relay › Component Information › Locations23
- Sensors and Switches - Emission Control Systems › EGR Temperature Sensor › Component Information › Locations
Fuel Delivery and Air Induction152 pages
- Fuel Pressure › System Information › Technical Service Bulletins › Fuel - CIS/CIS-E Fuel Pressure Tester2
- Air/Fuel Mixture › System Information › Adjustments
- Accelerator Pedal › Accelerator Pedal Switch › Component Information › Technical Service Bulletins › Uneven Idle Speed With Transmission in Gear23
- Accelerator Pedal Position Sensor › Component Information › Locations
- Air Cleaner Housing › Air Filter Element › Component Information › Service and Repair
Air Flow Meter/Sensor › Component Information9 pages
- Altitude Compensator › Component Information › Locations234
- Auxiliary Air Valve (Idle Speed) › Component Information › Locations2
- Cold Start Valve <--> [Cold Start Injector] › Component Information › Technical Service Bulletins › Engine - Long Crank Time Before Start/Misfire/Runs Rough2345
- Electro-Hydraulic Actuator <--> [Differential Pressure Regulator] › Component Information › Locations2345
- Fuel › Component Information › Technical Service Bulletins › Maintenance - Factory Approved Service Products2345
Fuel Accumulator2 pages
- Component Information › Description and Operation2
- Component Information › Description and Operation
- Fuel Distributor › Component Information › Description and Operation
- Fuel Filter › Component Information › Description and Operation2
- Fuel Injector › Fuel Injector Line › Component Information › Tools and Equipment
- Fuel Pressure Check Valve › Component Information › Technical Service Bulletins › Engine is Difficult to Start When Warm23
- Fuel Pressure Regulator › Component Information › Description and Operation
- Fuel Pressure Sensor/Switch › Component Information › Locations
Fuel Tank11 pages
Fuel Filler Neck › Component Information › Technical Service Bulletins2 pages
Fuel Gauge Sender › Component Information9 pages
- Idle Calibration Resistor › Component Information › Locations
Idle Speed/Throttle Actuator - Electronic › Component Information5 pages
- Main Relay (Computer/Fuel System) › Component Information › Locations23
Sensors and Switches - Fuel Delivery and Air Induction22 pages
- Accelerator Pedal Position Sensor › Component Information › Locations
- Accelerator Pedal Switch › Component Information › Technical Service Bulletins › Uneven Idle Speed With Transmission in Gear23
Air Flow Meter/Sensor › Component Information9 pages
- Fuel Pressure Sensor/Switch › Component Information › Locations
- Thermo Time Switch › Component Information › Locations
- Supercharger › Supercharger Oil › Component Information › Technical Service Bulletins › Maintenance - Factory Approved Service Products2345
- Thermo Time Switch › Component Information › Locations
Throttle Valve Assembly <--> [Throttle Body] › Component Information › Technical Service Bulletins4 pages
All Technical Service Bulletins for Throttle Valve Assembly:2 pages
- Customer Interest: › DD07.3-85012 › Jan › 85 › Fuel - Pressure Point When Increasing RPM From Idle
- All Other Service Bulletins for Throttle Valve Assembly: › DDAF07_32-U-6400X › Jan › 99 › Idle Speed Drops Below 1100 Rpm at Operating Temp.
- Accelerator Cable <--> [Throttle Cable/Linkage] › Component Information › Technical Service Bulletins › Idle Speed Exceeds 1100 RPM at Times
- Throttle Return Spring › Component Information › Technical Service Bulletins › Idle Speed Exceeds 1100 RPM at Times
Ignition System38 pages
- Firing Order › Component Information › Specifications
Crankshaft Position Sensor › Component Information3 pages
- Ignition Cable › Component Information › Technical Service Bulletins › Ignition System - Wires with Crimp-On terminals2
- Ignition Coil › Component Information › Technical Service Bulletins › Engine - Intermittent Poor Performance
Ignition Control Module › Component Information3 pages
Relays and Modules - Ignition System › Ignition Control Module › Component Information3 pages
Sensors and Switches - Ignition System4 pages
Crankshaft Position Sensor › Component Information3 pages
- Ignition Switch › Ignition Switch Lock Cylinder › Component Information › Service and Repair
Spark Plug › Component Information14 pages
Technical Service Bulletins10 pages
All Technical Service Bulletins for Spark Plug:5 pages
- Customer Interest: › 15_003B › Jun › 86 › Ignition - Updated Heat Ranges for Spark Plugs
All Other Service Bulletins for Spark Plug:4 pages
- Specifications › Spark Plug Gap2
- Tools and Equipment › Spark Plug Pliers - AST Tool # H 18492
Transmission Control Systems6 pages
- Actuators and Solenoids - Transmission and Drivetrain › Actuators and Solenoids - A/T › Shift Solenoid, A/T › Component Information › Locations › Kickdown Switch2
- Lamps and Indicators - Transmission and Drivetrain › Lamps and Indicators - A/T › Shift Indicator › Component Information › Locations
- Relays and Modules - Transmission and Drivetrain › System Information › Technical Service Bulletins › Electrical - Electrostatic Discharge Damage Prevention
- Sensors and Switches - Transmission and Drivetrain › Sensors and Switches - A/T › Downshift Switch, A/T › Component Information › Locations › Kickdown Switch2