Diesel engine fuel system Volkswagen Passat B5

Technical data of diesel engine control systems
Engine code AHU AFN AHH Idle speed, rpm 940±40 730±30 850±50 – with automatic transmission, rpm – 830±30 – Maximum speed, rpm 5000±200 5000±200 5000±100 Fuel injection pressure...

Diesel fuel system device
Location of diesel engine controls in the engine compartment 1 - sensors for pressure and temperature of air entering the engine. On vehicles manufactured before VIII.1997, the...

Checking the diesel engine preheating system
Location of coolant temperature sensor (A) 1, 3 - electrical connector contacts Verification conditions The voltage of the vehicle's on-board network must be no lower than 11.5 V....

Checking glow plugs
Using an LED Test Light to Check Glow Plug Functionality If the LED lights up, the glow plug is OK. If the LED does not light up, the glow plug is bad and needs to be replaced....

Removal and installation glow plugs
Glow plugs with normal annular gap (1) and without annular gap (2) Removal 1. Disconnect the electrical wires from the glow plugs. 2. Remove the glow plugs. Installation 1. Screw...

Fuel heating system
To increase the fluidity of diesel fuel at low outside temperatures, it must be heated. Heating is performed by additional pumping of fuel, which returns from the high-pressure...

Removal and installation fuel injectors
Heat-protective sealing ring Arrow points to the cylinder head. Warning: When testing the fuel injectors, never place your hands or any part of your body under the jet of fuel...

Main faults of the engine management system
Before troubleshooting, make sure that there is sufficient fuel in the fuel tank, the engine has no mechanical defects, the battery is charged and the starter turns the engine...

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