Engine management system «KE-Motronic» Volkswagen Passat B4

Integrated engine management system «KE-Motronic»
The "9A" engine is equipped with a comprehensive engine management system (ECMS) "KE-Motronic" from Bosch (fig. 2-199), designed to control fuel injection and ignition advance...

Fuel injection control subsystem
A modified fuel injection system is used as a fuel injection control subsystem in the KE-Motronic KSUD "KE-Jetronic". which, like the above-described K-Jetronic fuel injection...

Checking and adjusting the fuel injection control subsystem
When working on the KE-Motronic KSUD, it is necessary to observe the same precautions as when working on the Digifant KSUD, except that when checking the compression in the engine...

Checking the idle speed
The engine crankshaft speed at idle is automatically maintained within specified limits (800-900 rpm) rotary knob according to the controller commands. Idle speed is checked on a...

Adjusting the CO content in exhaust gases
This adjustment is performed on a warm engine, making sure that the engine exhaust tract is tight. Connect the gas analyzer to the measuring pipe of the exhaust system. Start the...

Checking and adjusting the idle switch
Examination Turn off the ignition. Disconnect the switch connector. Connect an ohmmeter to the terminals of the switch block and measure its resistance, which should be zero when...

Checking and adjusting the full load switch
Turn off the ignition. Disconnect the full load switch connector and connect an ohmmeter to the terminals of the socket, which should show "infinity" (the circuit is open). Fix...

Adjusting the air flow meter potentiometer
Turn off ignition. Connect test lead VAG 1591 (pos. 4 fig. 2-205) to the terminals of the potentiometer and the junction block. Connect the digital voltmeter to blocks "1" and "3"...

Adjusting the position of the air flow meter pressure disc
The adjustment procedure is the same as for the injection system "K-Jetronic", but the position of the disk is adjusted by a screw (fig. 2-206).

Checking the idle speed control valve
Turn off the ignition. Disconnect the idle speed control connector, connect an ohmmeter to the terminals of the connector (fig. 2-207) and check the ohmmeter readings, which...

Checking the supply voltage of the heating element of the oxygen sensor in the exhaust gases
Disconnect the 2-pin or 4-pin sensor connector. Connect the voltmeter to the terminals of the 2-pin connector. On late production vehicles, connect a voltmeter to terminals "2"...

Checking the mixture enrichment
Warm up the engine (oil temperature not less than 60°C). Make sure that there are no fault codes stored in the controller memory. Turn off the ignition. Disconnect the connector...

Checking for fuel cut-off at forced idle
Switch off ignition. Disconnect the connector of the electrohydraulic control pressure regulator. Connect the test cord 1 (fig. 2-208) VAG 1315 A/1 and transition wires to the...

Checking the electromagnetic shut-off valve of the adsorber
Turn off ignition. Disconnect valve connector (gray color), connect an ohmmeter to the terminals of the valve block 1 (fig. 2-209) and check its readings, which should be within...

Checking the fuel pressure in the system
Turn off the ignition. Connect the pressure gauge to the measuring pipe of the fuel dispenser and to the fuel line of the starting injector (fig. 2-210). Remove the fuel pump...

Self-diagnosis system
The operating principle of the self-diagnostic system and the method of coding faults are the same as in the diagnostic system used for the fuel injection system "Mono-Jetronic"....

Checking and adjusting the subsystem
Removal and installation the ignition distributor Removal and installation of the ignition distributor are carried out as indicated in the subsection "KR Engine Ignition System" ....

Fuel system of the engine «9A»
Fig. 2-212. Details of the fuel system of the "9A" engine: 1 - fuel tank cars with a "sedan" body; 2 - fuel tank of cars with a "station wagon" body; 3 - expansion box; 4 - filler...

Wiring diagram of the KE-Motronic control system for the 9A engine
Fig. 2-213. Wiring diagram of the KSUD "KE-Motronic" engine "9A": 1 — controller; 2 - air conditioner connector; 3 — diagnostic connector; 4 - detonations; 1, 5 - knock sensor 2;...

Adjustment of the fuel injection control subsystem KSUD «Motronic» of the engine «AAA»
Fig. 15. Placement of elements of the fuel injection control subsystem KSUD "Motronic" on the vehicle "Passat 2,8 VR6": 1 - mass air flow meter; 2 — throttle body; 3 — controller;...

Possible malfunctions of the fuel injection control subsystem KSUD «Motronic» of the engine «AAA»
Possible malfunctions of the fuel injection control subsystem KSUD "Motronic" of the engine "AAA" of the car "Passat 2,8 vr6", their causes and methods of elimination.

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