Beetle L4-1.9L DSL Turbo (ALH) (1998)
Test requirements
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The respective fuses of Diesel-Direct fuel injection system must be OK:
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Generator (GEN) OK.
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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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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.
Test sequence
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Switch ignition off.
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Remove inner cover of plenum chamber, left side.
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Connect test box to control module wiring harness, connect test box for wiring test. See: Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring Test
Vehicles with 80-pin control module
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Bridge sockets 33 + 1 using adapter cables from V.A.G 1594.
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Switch ignition on.
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Measure voltage between the following sockets:
2+1, 28+1, 27+2 and 28+27
Specified value: approx. battery voltage
Vehicles with 121-pin control module
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Measure voltage between the following sockets:
1/2 and 4/5
37 and 4/5
Specified value: about 0 V
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Switch ignition on.
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Measure voltage anew between the following sockets:
1/2 and 4/5
37 and 4/5
Specified value approx. battery voltage
Continuation for all vehicles
If specified value is not obtained:
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Check Power Supply (Terminal 30, B+) Relay - J317-:
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Check wire connections at the terminal locations for open circuit, short circuit and contact resistances according to wiring diagram.
If no malfunctions are detected in wires and at relay:
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Replace Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248-.
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Erase DTC memory of control module for Diesel-Direct fuel injection system, Diagnostic mode 4: Reset/erase diagnostic data. See: Testing and
Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes