Secondary Air Injection System Motor, Checking

Secondary Air Injection System Motor, Checking

Recommended Special Tools, Workshop Equipment, Testers, Measuring Instruments and Auxiliary Items
- V.A.G 1526 portable multimeter or V.A.G 1715 multimeter
- Adapter set V. A. G 1594
- Wiring diagram

Test Conditions
- The corresponding 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 V.
- All electrical consumers such as, for example, lights and rear window defroster must be switched off.
- Ignition switched off.

Test Sequence







- Remove center noise insulation - arrows -.







- Disconnect 2-pin connector -1 - from Secondary Air Injection (AIR) Pump Motor V101.
- Disconnect vacuum hose at Secondary Air Injection (AIR) Pump Motor V101.
- 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.

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 ECM. Diagnostic Mode 04 - Erase DTC Memory
- Generate readiness code. 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 -1-.
- Check wire connection between terminal 2 on relay plate and terminal 2 on the 2-pin connector from Secondary Air Injection (AIR) Pump Motor for open circuit according to wiring diagram.

Wiring resistance: max. 1.5 Ohms
- Also check wire connections for short circuit to B+ and Ground (GND).

Specified value: Infinity Ohms

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







Wiring resistance: max. 1.5 Ohms

If no malfunction is found in wire connections:
- Replace Motronic Engine Control Module (ECM) J220.
- Erase DTC memory of ECM. Diagnostic Mode 04 - Erase DTC Memory
- Generate readiness code. Generate Readiness Code