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Home >> Volkswagen >> 2012 >> Passat S, 2.5L Eng VIN H, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> 2.5L - Generic Scan Tool - Engine Code(S): CBTA & CBUA >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> Secondary Air Injection Solenoid Valve, Checking >> Procedure
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Secondary Air Injection Solenoid Valve, Checking: Procedure

-- Disconnect the Secondary Air Injection (SAI) Solenoid Valve --N112-- electrical harness connector.

Checking internal resistance

-- Using a multimeter, check the Secondary Air Injection (SAI) Solenoid Valve --N112-- terminals 1 to 2 for resistance.

Specified value: 3.5 - 8.5 Ω (at approx. 20 °C)

If the specified value was Not obtained:

-- Replace the Secondary Air Injection (SAI) Solenoid Valve --N112--.

If the specified value was obtained:

Checking voltage supply

Start the engine.

-- Using a multimeter, check the Secondary Air Injection (SAI) Solenoid Valve --N112-- electrical connector terminal 1 to Ground for voltage.

Specified value: Battery voltage.

Switch the ignition OFF.

If the specified value was Not obtained:

-- Check the wiring from the Secondary Air Injection (SAI) Solenoid Valve --N112-- electrical connector terminal 1 to the Secondary Air Injection (SAI) Pump Relay -J299- or Fuel Pump Relay -J17- for a short circuit to Ground, or an open circuit. Refer to Wiring Diagrams for circuit layout/pin locations.

-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-- If necessary, repair the wiring connection.

If the specified value was obtained:

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