Beetle L4-1781cc 1.8L Turbo (APH) (1999)
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VAG1527 voltage test lamp
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VAG1594 connector test kit
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Wiring diagram
Test requirements
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The respective fuses of fuel injectors (Cylinder 1 Fuel Injector -N30- to Cylinder 4 Fuel Injector -N33-) must be OK.
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Fuel Pump (FP) Relay -J17- must be OK, check:
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Battery voltage must be at least 11.5 volts.
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All electrical consumers such as, for example, lights and rear window defroster must be switched off.
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Parking brake must be engaged or else daylight driving lights will be switched on.
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For vehicles with automatic transmission, selector lever must be in position -P- or -N-.
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If vehicle is equipped with an A/C system, it must be switched off.
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Ground (GND) connections between engine and chassis must be OK.
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Engine speed (RPM) sensor must be OK, checking. See: Computers and Control Systems/Engine Speed Sensor/Testing and Inspection
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Ignition switched off.
Test sequence
Resistance values of fuel injectors, checking
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Test resistance of fuel injectors between terminals.
Specified value: 12...17 ohms
NOTE: Resistance value is valid at approx. 20 degrees C. At higher temperatures, resistance value increases.
If specified value is not obtained:
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Replace malfunctioning fuel injector, item 10
Note the following when installing the fuel injectors:
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Replace O-rings on all fuel injectors and wet them slightly with clean motor oil.
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Insert fuel injectors into fuel rail perpendicular and in the right position, and secure them with retaining clips.
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Position fuel distributor with secured fuel injectors on intake manifold and apply uniform pressure to press it in.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Read Measuring Value Blocks (Function 08)/With Generic Scan
Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes