Checking Secondary Air Injection (AIR) Pump Motor and Relay

Required special tools and test equipment
- VAG 1551 or VAG 1552 Scan Tool (ST) with VAG 1551/3 adapter cable
- VAG 1598/22 test box

Checking
- Start output Diagnostic Test Mode (DTM) for secondary air injection pump relay -J299-. Refer to On-Board Diagnostics II in Computers and Control Systems/System Diagnosis. Testing and Inspection

Indicated on display

Output Diagnostic Test Mode ->
Secondary Air Injection Pump Relay-J299

The secondary air injection pump relay -J299- actuates the secondary air injection pump motor -V101-. The motor will run at intervals until the -> button is pressed, which ends the output DTM.

If the secondary air injection pump motor does not run at intervals:
- Separate the 2-pin connector from secondary air injection pump motor and connect VAG 1527B LED voltage tester to harness connector terminals.
LED must blink.

If LED test light blinks.:
- Replace secondary air injection pump motor -V101-.

If LED test light does not blink but the secondary air injection pump relay clicks:
- Check secondary air injection pump relay -J299- fuse..

If the fuse is OK:
- Remove secondary air injection pump relay from relay panel.

CAUTION! Before working on the electrical system:
- Determine the correct coding for the anti-theft radio.
- Disconnect the battery Ground (GND) strap.

- Check relay voltage supply (terminal 30) according to wiring diagram.
- If voltage is present replace secondary air injection pump relay -J299-.

If the LED does not blink and the secondary air injection pump relay does not click:
- Switch ignition off.





- Connect VAG 1598/22 test box to ECM harness connector
- Connect multimeter US 1119 (Fluke 83 or equivalent) to check for open circuit between test box socket 30 and terminal 6 in relay panel.
Specified value: max. 1.5 Ohms

If no malfunction is indicated:
- Replace Motronic ECM -J220-.
- Carry out adaptation of throttle valve control module to ECM.
- Check readiness code. If Diagnostic Trouble Code (DTC) memory has been erased, or ECM was disconnected, generate new readiness code.