ignition AUDI A4 1999 B5 / 1.G AWM Engine Camshaft Timing Control Workshop Manual
Page 3 of 7
15-94
Test requirements:
Vehicle diagnostic, testing and information
system VAS 5051 or VAG 1551 Scan Tool
connected
Test sequence
- Initiate output Diagnostic Test Mode (DTM) and
activate solenoid valve for camshaft adjuster.
Output Diagnostic Test Mode Camshaft timing control
Display
If the valve is not actuated (does not click).
Checking internal resistance
This valve is actuated (clicks) for approx. one minute if the operation is
not switched to the next component by pressing the key.
- Check internal resistance of solenoid valve for camshaft adjuster.
- Switch ignition off.
- Disconnect connector -arrow- from camshaft adjuster.
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Page 4 of 7
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If specified value is not attained:
If specified value is attained:
Checking power supply
Test requirements:
Electrical Wiring Diagrams, Troubleshooting & Component Locations
binder
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Fuel Injection & Ignition,
Engine Code(s): AWM, Repair Group 24
- Connect multimeter to valve to measure resistance.
Specified value: 10 to 18
- Replace solenoid valve for camshaft adjuster.
- Check power supply.
Fuse for solenoid valve for camshaft adjustment OK Fuel pump relay OK.
- Disconnect connector -arrow- from camshaft adjuster.
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Page 6 of 7
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Checking actuation
- Connect voltage tester VAG 1527 B to contacts 1 (positive) and 2 of
connector.
- Initiate output Diagnostic Test Mode (DTM) and activate solenoid valve
for camshaft adjuster.
Output Diagnostic Test Mode Camshaft timin
g control
Display
If the LED lamp does not flash or if it lights up continuously:
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Fuel Injection & Ignition,
Engine Code(s): AWM, Repair Group 24
LED should flash.
- Connect the VAG 1598/31 test box to wiring harness leading to engine
control module (the engine control module should not be connected):
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