With Generic Scan Tool

Secondary Air Injection (AIR) Pump Motor, Checking

Recommended special tools and equipment
- VAG1526 multimeter or VAG1715 multimeter
- VAG1594 connector test kit
- Wiring diagram

Test requirements







- The respective fuses of Secondary Air Injection (AIR) Pump Motor -V101- must be OK.
- Fuel Pump (FP) Relay -J17- must be OK, check.
- Secondary Air Injection (AIR) Pump Relay -J299- must be OK, check.
- Battery voltage must be at least 11.5 volts.
- All electrical consumers like, for example, lights and rear window heating must be switched off.
- 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).

Continuation for all vehicles
- Disconnect pressure hose 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.

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, item 19,
- Vehicles with engine code BDF, item 20.

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

- Generate readiness code.
Monitors, Trips, Drive Cycles and Readiness Codes

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, see Fig. 1.

Fig. 1 Relay position assignment in protective housing (engine compartment, left)







Secondary Air Injection (AIR) Pump Relay -J299-* (arrow)

NOTE:
- Remove battery Ground (GND) strap if tools are necessary for removal of relays or control modules from the relay carrier.
- Obtain radio code for radios with anti-theft coding before disconnecting battery.
- Check activation of the Secondary Air Injection (AIR) Pump Relay.

- Vehicles with engine code BDF, see Fig. 1.

Fig. 1 Relay position assignment in protective housing (engine compartment, left)







1 - Secondary Air Injection (AIR) Pump Relay -J299-*
2 - Motronic Engine Control Module (ECM) Power Supply Relay -J271-*

NOTE:
- Remove battery Ground (GND) strap if tools are necessary for removal of relays or control modules from the relay carrier.
- Obtain radio code for radios with anti-theft coding before disconnecting battery.
- Check relay activation.







- 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 Ohms

- Also check the wire for short circuit to B+ and Ground (GND).
Specified value: Infinity Ohms

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 Ohms

Vehicles with engine code BDF







- Check wire between 2-pin connector terminal 1 and Ground (GND) for open circuit according to wiring diagram.
Wire resistance: max: 1.5 Ohms

Continuation for all vehicles
If no malfunctions are found in wires:
- Replace Motronic Engine Control Module (ECM) -J220-.