TT Coupe L4-1.8L Turbo (ATC) (2001)
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Connect multimeter at valve for resistance measurement.
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Specified value: 25 - 35 ohm
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If specified value is not obtained, replace Secondary Air Injection (AIR) solenoid valve- N112 -.
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Check wire connection from terminal 1 of connector to Fuel Pump (FP) relay via fuse for open circuit:
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Check Fuel Pump (FP) relay.
Checking activation
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Connect VAG 1527B voltage tester as follows:
Harness connector terminal
Measure to
2
B+
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Initiate Output Diagnostic Test Mode (DTM) and activate Secondary Air Injection (AIR) solenoid valve - N112 -.
Indicated on display:
Output Diagnostic Test Mode
->
Secondary Air Inject Solenoid Valve-N112
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LED must blink.
If LED does not blink or if it remains constantly lit:
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Connect VAG 1598/31 test box at wiring harness to ECM, do not connect ECM.
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Check the following wire connections for open circuit and short circuit to Ground and B+:
Harness connector terminal
VAG 1598/31 test box socket
2
9
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Repair open circuit or short circuit if necessary.
If wire connection is OK:
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Replace Engine Control Module (ECM).