Ignition and control system Mercedes S-Class (W220)

Engine Electrical Specifications
Note: Individual characteristics are also given in the text of the Chapter and, if their implementation is mandatory, are highlighted in bold. Ignition/gasoline engine...

Basic elements of a microprocessor control system
Engine controls 112, 113 1 - Right camshaft adjustment solenoid; 2 - Air mixing system pump (AIR); 3 - Mass Air Flow (MAF) Temperature Sensor; 4 - Electronic...

Checking the ignition and injection control system
General information The ignition system components are very reliable. Failures are usually due to unreliability or contamination of contacts. Breakdowns in high-voltage...

Troubleshooting — General Information and Preliminary Checks
Ignition control signal oscillograms Please also refer to Section Using an Oscilloscope to Monitor Signals in Control System Circuits . 1 - Crankshaft rotation angle...

Checking and adjusting the ignition timing angle
Since the ignition timing is constantly monitored and adjusted by the engine management system, there is no nominal value. Manual checking and adjustment is not...

Spark plugs — checking condition
General description The spark plug consists of a central electrode, an insulator with a housing and a ground electrode(s). A spark jumps between the central electrode...

Self-diagnosis of electronic control systems of the second generation OBD II
Connecting a multimeter to the engine control unit connectors using an auxiliary splitter 001 - ECM Connectors; 003 - Digital Multimeter; 050 - 126-pin splitter; 108 -...

Controller for interfacing a personal computer with the on-board self-diagnostic system OBD II
According to SAE (PWM and VPW) and ISO 9141-2 standard protocols. Note: GM models comply with the VPW standard, Ford models comply with the PWM standard, and Asian and...

Using an Oscilloscope to Monitor Signals in Control System Circuits
Digital multimeters are great for testing static electrical circuits and for recording slow changes in monitored parameters. When performing dynamic tests on a running...

Digital data bus CAN
CAN Functionality A1 - Instrument panel; CAN B - CAN data bus. Interior; CAN C - CAN data bus. Engine and chassis; N₂/7 - Self-diagnostic systems control unit; N3/10 -...

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W140 (1991-1998)