Air Injection Pump Relay: Testing and Inspection

Secondary Air Injection (AIR) Pump Relay -J299- And Activation, Checking

Special tools and equipment







- VAG1526A
- VAG1527B
- VAG1594A
- VAG1598/31

Installation location See Installation locations-Overview.

Test sequence
- Initiate output Diagnostic Test Mode (DTM) and activate Secondary Air Injection (AIR) pump relay -J299-







- The Secondary Air Injection (AIR) pump relay (in 3-socket relay carrier in the E-box, at left in plenum chamber, position 2) must engage and the Secondary Air Injection (AIR) pump motor -V101- must run in intervals

A - If relay does not trigger:
- Check voltage supply of Secondary Air Injection (AIR) pump relay.
- Check activation of Secondary Air Injection (AIR) pump relay.

B - If relay triggers, but Secondary Air Injection (AIR) pump does not run:
- Check voltage supply of Secondary Air Injection (AIR) pump motor.

Checking voltage supply of Secondary Air Injection (AIR) pump relay
- Switch ignition off.
- Remove Secondary Air Injection (AIR) pump relay
- Connect multimeter for voltage measurement as follows.

3-socket relay carrier in E-box, Measure to
plenum chamber, position 2
terminal
8 Engine Ground (GND)

- Specification: approx. battery voltage

If specified value is not obtained:
- Perform following tests marked with dots:







- Check fuse S130 (40 A) in 3-socket relay carrier in E-Box, plenum chamber, position 7.
- Check wire connection from battery + (terminal 30) to Secondary Air Injection (AIR) pump relay -J299- (in 3-socket relay carrier in E-Box, plenum chamber, position 2) for open circuit.

- Connect multimeter for voltage measurement as follows.

3-socket relay carrier in E-box, Measure to
plenum chamber, position 2

terminal
4 Engine Ground (GND)

- Operate starter briefly.

- Specification: approx. battery voltage

If specified value is not obtained:
- Perform following tests marked with dots:







- Check fuse S234 (in fuse holder, position 34).
- Check wire connection from Secondary Air Injection (AIR) pump relay -J299- (in 3-socket relay carrier in E-box, plenum chamber) via fuse S234 (in fuse holder, position 34) to Fuel Pump (FP) relay for open circuit:

Check activation of the Secondary Air Injection (AIR) pump relay
- Switch ignition off.
- Remove Secondary Air Injection (AIR) pump relay
- Connect VAG1527B voltage tester as follows:

3-socket relay carrier in E-box, Measure to
plenum chamber, position 2

terminal
6 B+

- Initiate output Diagnostic Test Mode (DTM) and activate Secondary Air Injection (AIR) pump relay -J299-

- LED must blink.

If LED does not blink:
- Switch ignition off.
- Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM.

- Check following wire connection for open circuit and short circuit to Ground (GND) and

3-socket relay carrier in E-box, VAG1598/31 test box
plenum chamber, position 2 Bushing

terminal
6 46

- Repair open circuit or short circuit if necessary.

If no malfunctions are detected:
- Replace Secondary Air Injection (AIR) pump relay -J299-.

Check voltage supply of the Secondary Air Injection (AIR) pump motor
- Remove connector for Secondary Air Injection (AIR) pump motor -V101-.
- Connect VAG1527B voltage tester between terminals 1 and 2
- Initiate output Diagnostic Test Mode (DTM) and activate Secondary Air Injection (AIR) pump relay -J299-

- LED must blink.

If LED does not blink:
- Perform following tests marked with dots:
- Check wire connection from connector at Secondary Air Injection (AIR) pump motor -V101- to Secondary Air Injection (AIR) pump relay -J299- (in 3-socket relay carrier in E-Box, plenum chamber, position 2) for open circuit.
- Check wire connection from connector at Secondary Air Injection (AIR) pump motor -V101- to Ground (GND) connection 1 in engine compartment wiring harness for open circuit:

If no malfunctions are detected:
- Replace Secondary Air Injection (AIR) pump motor -V101-