Secondary Air Injection Pump Motor, Checking

Special tools and workshop equipment required

Multimeter VAG1526 or multimeter VAG1715
Connector test kit VAG1594
Wiring diagram

Test requirements

Fuses in E-box (in plenum chamber, left) must be OK: Refer to SYSTEM WIRING DIAGRAM

Fig 1: Identifying Fuses In E-Box (In Plenum Chamber, Left)
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
Motronic Engine Control Module (ECM) Power Supply Relay -J271- must be OK, check: Refer to SYSTEM WIRING DIAGRAM
Secondary Air Injection (AIR) Pump Relay -J299-) must be OK, check: Refer to SYSTEM WIRING DIAGRAM
Battery voltage must be at least 11.5 volts.
All electrical consumers such as, for example, lights and rear window defroster must be switched off.
Ground (GND) connections between engine and chassis must be OK.
Ignition switched off.

Test sequence

-- Disconnect 2-pin connector (arrow) from Secondary Air Injection (AIR) Pump Motor -V101-.

Fig 2: Disconnecting 2-Pin Connector From Secondary Air Injection (AIR) Pump Motor -V101-

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove pressure hose between Secondary Air Injection (AIR) Pump Motor and pressure line at Secondary Air Injection (AIR) Pump Motor (.

NOTE:

To disengage, compress the buttons at the hose coupling.

-- Connect Secondary Air Injection (AIR) Pump Motor to the B+ and Ground (GND) terminals of the battery using the respective adapter cables.

Fig 3: Connecting Secondary Air Injection (AIR) Pump Motor To B+ And Ground (GND) Terminals Of Battery Using Respective Adapter Cables

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

The Secondary Air Injection (AIR) Pump Motor must start up and air must escape at compressed-air connection (arrow).

If the motor does not start up, or no air or only very little air escapes:

-- Disconnect connection between Secondary Air Injection (AIR) Pump Motor and battery.

-- Replace Secondary Air Injection (AIR) Pump Motor -V101-

-- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.

-- Generate readiness code.

If motor starts, and air escapes:

-- Disconnect connection between Secondary Air Injection (AIR) Pump Motor and battery.

-- Remove Secondary Air Injection (AIR) Pump Relay -J299-.

Fig 4: Identifying Fuses In E-Box (In Plenum Chamber, Left)

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

NOTE:

Do not use metallic tools to pry off relays from relay carrier. The terminals could conduct electricity.

-- Check wire between terminal 4b of relay carrier and terminal 2 of 2-pin connector of Secondary Air Injection (AIR) Pump Motor for open circuit according to wiring diagram.

Fig 5: 2-Pin Electrical Connector & Terminals

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Wire resistance: max. 1.5 Ω

-- Also check the wire for short circuit to B+ and Ground (GND).

Specified value: ∞ Ω

-- Check wire between 2-pin connector terminal 1 and Ground (GND) for open circuit according to wiring diagram.

Fig 6: 2-Pin Electrical Connector & Terminals

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Wire resistance: max. 1.5 Ω

-- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.

-- Generate readiness code.

If no malfunctions are found in wires:

-- Replace Motronic Engine Control Module (ECM) -J220- ENGINE CONTROL MODULE, REPLACING .