TT L4-1.8L Turbo (BEA) (2004)
Air Injection Control Valve: Testing and Inspection
With Generic Scan Tool
Secondary Air Injection (AIR) Valve, Checking
Secondary Air Injection (AIR) valve is closed when no voltage is present.
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 Secondary Air Injection (AIR) Solenoid Valve -N112- must be OK.
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Ignition switched off.
Test sequence
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Disconnect 2-pin connector from Secondary Air Injection (AIR) Solenoid Valve -N112- (-2-).
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Measure resistance between terminals of Secondary Air Injection (AIR) valve.
Specified value: 25.0...35.0 Ohm
If specified value is not obtained:
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Replace Secondary Air Injection (AIR) Solenoid Valve -N112-, item 3 .
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Computers and Control
Systems/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: Computers and Control Systems/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, do not connect Engine Control Module (ECM), connecting test box for wiring test. See:
Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic
Scan Tool/Test Box, Connecting For Wiring Test
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Check wire between test box socket 9+2-pin connector terminal 2 for open circuit according to wiring diagram.
Wire resistance: max: 1.5 Ohm
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Also check the wire for short circuit to B+ and Ground (GND).
Specified value: Infinite Ohm