TT L4-1.8L Turbo (BEA) (2004)
Variable Valve Timing Actuator: Testing and Inspection
With Generic Scan Tool
camshaft Adjustment Valve, Checking
Function
The camshaft adjustment is load- and RPM dependent. The electrical valve for camshaft adjustment switches oil pressure onto camshaft adjuster
(mechanical adjustment mechanism), which adjusts the camshaft.
Recommended special tools and equipment
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VAG1526 multimeter or VAG1715 multimeter
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VAG1594 connector test kit
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Wiring diagram
Test requirements
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The respective fuses of the Valve -1- for camshaft adjustment -N205-must be OK.
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Fuel Pump (FP) Relay -J17- must be OK.
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Battery voltage must be at least 11.5 volts.
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All electrical consumers like, for example, lights and rear window heating 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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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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Ignition switched off.
Test sequence
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Measure resistance between terminals of valve for camshaft adjustment.
Specified value: 10...18 Ohm
If specified value is not obtained:
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Replace the valve for camshaft adjustment, item 11.
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Erase DTC memory of Engine Control Module (ECM), 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/Audi Drive Cycle/Readiness Code/With
Generic Scan Tool/Readiness Code, Generating
If specified value is obtained:
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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