Secondary Air Injection (AIR) pump motor, checking

Recommended special tools and equipment 

• V.A.G 1526 multimeter or V.A.G 1715 multimeter
• V.A.G 1594 connector test kit
• Wiring diagram

Test requirements 

• The respective fuses of Secondary Air Injection (AIR) Pump Motor -V101- must be OK:

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

• Fuel Pump (FP) Relay -J17- must be OK, check:

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

• Secondary Air Injection (AIR) Pump Relay -J299- must be OK, check:

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

• 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 

• Remove front noise insulation.

Vehicles with engine code AFP 

• Disconnect 2-pin connector from motor for secondary air pump (arrow).

Vehicles with engine code BDF 

• Disconnect 2-pin connector from motor for secondary air pump (arrow).

Vehicles with engine code BJS 

• Disconnect 2-pin connector from motor for secondary air pump (arrow).

Continuation for all vehicles 

• Disconnect pressure hose at Secondary Air Injection (AIR) pump motor.

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

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-:

• Vehicles with engine code AFP. Refer to Parts of Secondary Air Injection (AIR) system (vehicles with engine code AFP), removing and installing  , item 19
• Vehicles with engine code BDF. Refer to Parts of Secondary Air Injection (AIR) system (vehicles with engine code BDF), removing and installing  , item 20
• Vehicles with engine code BJS. Refer to Parts of Secondary Air Injection (AIR) system (vehicles with engine code BJS), removing and installing  , item 18

• Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
• Generate readiness code. Refer to Readiness code, generating

If motor starts, and air escapes:

• Disconnect connection between Secondary Air Injection (AIR) Pump Motor and battery.
• Remove Secondary Air Injection (AIR) pump relay from relay carrier in protective housing for control modules:

• Vehicles with engine code AFP. Refer to Relay position assignment in protective housing (engine compartment, left)  ,
• Vehicles with engine code BDF. Refer to Relay position assignment in protective housing (engine compartment, left)  ,
• Vehicles with engine code BJS. Refer to Relay position assignment in protective housing (engine compartment, left)  .

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

Wire resistance: max. 1.5 Ω

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

Specified value: ∞ Ω

Vehicles with engine code AFP 

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

Wire resistance: max. 1.5 Ω

Vehicles with engine codes BDF and BJS 

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

Wire resistance: max. 1.5 Ω

Continuation for all vehicles 

• Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
• Generate readiness code. Refer to Readiness code, generating

If no malfunctions are found in wires:

• Replace Motronic Engine Control Module (ECM) -J220-. Refer to Engine Control Module (ECM), replacing  .