Jetta Sedan L5-2.5L (CBTA) (2009)
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Replace the Secondary Air Injection (AIR) Solenoid Valve (N112).
If the specified value was obtained:
Checking voltage supply
Switch the ignition on.
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Using a multimeter, check the Secondary Air Injection (AIR) Solenoid Valve (N112) electrical connector terminal 1 to Ground (GND) for voltage.
Specified value: battery voltage.
Switch the ignition off.
If the specified value was not obtained:
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Check the wiring from the Secondary Air Injection (AIR) Solenoid Valve (N112) electrical connector terminal 1 to the Secondary Air Injection
(AIR) Pump Relay (J299) terminal 1/30 for a short circuit to Ground (GND), or an open circuit.
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the wiring connection.
If no malfunctions are found in the wiring:
Checking wiring
If the manufacturers test box is being used, perform the following step.
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Install the Adapter Cable (121 Pin) (VAG1598/31).
If the manufacturers test box is not being used, perform the following step.
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Remove the Motronic Engine Control Module (ECM) (J623). Refer to --> [ Motronic Engine Control Module, Replacing ] See: Computers and
Control Systems/Engine Control Module/Service and Repair/Motronic Engine Control Module, Replacing.
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Using a multimeter, check the Secondary Air Injection (AIR) Solenoid Valve (N112) electrical harness connector terminal 2 to the Motronic
Engine Control Module (ECM) (J623) electrical harness connector T60 terminal 17 for an open circuit.