Beetle L4-1.9L DSL Turbo (ALH) (1998)
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Measure resistance between terminals of change-over valve:
Specified value: 25...45 ohms
If specified value is not obtained:
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Replace change-over valve for intake manifold flap.
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Erase DTC memory of control module for Diesel- Direct fuel injection system, Diagnostic mode 4: Reset/erase diagnostic data. See: Computers
and Control Systems/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: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If specified value is obtained:
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Set multimeter for voltage measurement and connect it to terminals 1 + 2 at connector disconnected from change-over valve for intake manifold
flap.
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Start engine, and let run at idle.
Specified value: at least 4.5 V
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Switch ignition off. The voltage value must
fall to 0.0 Volts after approx. 3 seconds.
If voltage value does not change as described:
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Connect test box to control module wiring harness, connect test box for wiring test. See: Computers and Control Systems/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