A4 Sedan L4-1.8L Turbo (AWM) (2001)
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Check fuse S234 (in fuse box, position 34).
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Check for open circuit in wiring from secondary air injection pump relay (in 3-position relay carrier in E-box of plenum chamber) via fuse S234
(in fuse box, position 34) to fuel pump relay.
Check actuation of secondary air pump relay
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Switch ignition off.
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Remove secondary air injection pump relay.
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Connect voltage tester VAG 1527 B as follows:
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Initiate output Diagnostic Test Mode (DTM) and activate secondary air injection pump relay.
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LED must flash.
If LED does not flash:
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Switch ignition off.
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Connect VAG 1598/31 test box to wiring harness leading to engine control module; engine control module should not be connected:
