Audi AMB Service Manual page 169

ENGINE 1.8 Liter 4-Cyl. 5V Turbo Engine Mechanical, Engine Code(s): AMB
If LED lights up:
Check actuation.

Checking actuation
Fig. 232: Identifying 2-Pin Electrical Connector & Terminals
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Connect voltage tester VAG 1527B to contact 1 (positive) and 2 of connector.

Start output Diagnostic Test Mode and actuate camshaft adjustment valve.

Indicated on display
Output Diagnostic Test Mode -->
Camshaft timing control
LED must flash

If LED does not flash or if it is permanently lit:
Connect test box VAG 1598/31 to engine control module wiring harness. Engine control module must not

be connected. --> 24 - MULTIPORT FUEL INJECTION (MFI)
2005 Audi A4 Quattro
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