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Home >> Volkswagen >> 2012 >> Beetle Base, 2.5L Eng VIN X, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> 2.5L - Generic Scan Tool - Engine Code(S): CBTA & CBUA (Hatchback) >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> Secondary Air Injection Pump Motor -V101-, Checking >> Test Procedure
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Test Procedure

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

-- Disconnect the secondary air injection hose.

-- Disconnect the Secondary Air Injection (SAI) Pump Motor -V101- electrical harness connector.

Checking voltage

NOTE: The engine MUST be at ambient temperature and have at least 8 hours off time for the ECM to operate the Secondary Air Injection (SAI) system. Once activated, it will need a complete shutdown cycle again before it will initiate. The SAI system may operate for as little as 10 seconds, up to 55 seconds depending on ambient temperature.

-- Ignition switch Off.

-- Using a multimeter, check the Secondary Air Injection (SAI) Pump Motor -V101- electrical harness connector terminal 2 to ground for voltage. When ready, start the engine while monitoring the reading.

-- Start the engine.

Specified value: Battery voltage.

-- Switch the ignition OFF.

If the specified value was Not obtained:

-- Check the wiring connection from the Secondary Air Injection (SAI) Pump Relay -J299- socket 2 (relay terminal 87) through fuse SB-32 to the Secondary Air Injection (SAI) Pump Motor -V101- electrical harness connector terminal 2 for an open circuit or a short circuit.

-- Check the wiring connections for damage, corrosion, loose or broken terminals or an open fuse. Refer to the appropriate Wiring Diagram.

-- If necessary, repair the faulty wiring connection, replace fuse if needed.

If the wiring has no fault, the fuse is not open and voltage is Not present at the pump:

-- Perform the Secondary Air Injection (SAI) Pump Relay --J299-- test.

If the specified value was obtained:

Checking Ground

-- Using a multimeter, check the Secondary Air Injection (SAI) Pump Motor -V101- electrical harness connector terminal 1 to Ground for resistance.

Specified value: 1.5 Ω Max.

If the specified value was Not obtained:

-- Check the wiring for an open or high resistance.

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

-- If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK:

-- Replace Secondary Air Injection (SAI) Pump Motor -V101-.

-- Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

-- Perform a road test to verify repair.

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