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

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







Recommended special tools and equipment
- V.A.G 1526A multimeter
- V.A.G 1527 B Voltage Tester
- V.A.G 1594A connector test kit
- V.A.G 1598/31 test box

Test requirements:
- Battery voltage at least 12 V







- Fuse for secondary air pump -S130- (50 A) -item 7- in 3-pin relay carrier, E-box plenum chamber, OK







- Fuse S234 (in fuse holder, position 34) OK.
- Ignition switched off.

Test sequence







- Remove rubber seal of plenum chamber cover in direction of -arrow-.
- Remove cover -1- toward front.







- Remove cover for E-box, plenum chamber -arrows-.
- Connect test box to wiring harness of Engine Control Module (ECM), ECM is not connected. Connect test box to wiring harness of Engine Control Module (ECM), ECM is not connected. \e2113336>. Test Box, Connecting For Wiring and Component Test
- Using wires e.g. from connector test kit V.A.G 1594 A, bridge terminals 1 and 46 on test box.
- Switch ignition on.







- Secondary Air Injection (AIR) Pump Relay at position 2 (in 3-pin relay carrier, E-box plenum chamber) must engage and Secondary Air Injection (AIR) Pump Motor -V101- must run

- Switch ignition off.

A. Secondary Air Injection (AIR) Pump Motor runs.
- Check voltage supply of the Secondary Air Injection (AIR) pump relay
- Check activation of the Secondary Air Injection (AIR) pump relay
B. Secondary Air Injection (AIR) Pump Motor does not run.
- Check voltage supply of the Secondary Air Injection (AIR) pump motor

Checking voltage supply of Secondary Air Injection (AIR) pump relay







- Remove Secondary Air Injection (AIR) pump relay from position 2 in 3-pin relay carrier, E-box, plenum chamber.







- Connect multimeter for voltage measurement as follows.

3-pin relay carrier, E-box plenum chamber, position 2 Terminal Measure to
8 Engine Ground (GND)

Specified value: approx. battery voltage

If specified value is not obtained:
- Check wire connection from B+ (terminal 30) via Fuse for secondary air pump -S130- to Secondary Air Injection (AIR) Pump Relay -J299- (in 3-pin relay carrier, E-Box, plenum chamber, position 2) for open circuit according to wiring diagram.
- Specified value: Wire resistance max 1.5 Ohms







- Connect multimeter for voltage measurement as follows.

3-pin relay carrier, E-box plenum chamber, position 2 Terminal Measure to
4 Engine Ground (GND)

- Operate starter briefly (engine can also start).
- Specified value: approx. battery voltage
- Switch ignition off.

If specified value is not obtained:
- Check wire connection from Secondary Air Injection (AIR) Pump Relay -J299- (in 3-pin relay carrier, E-box plenum chamber) to Fuel Pump (FP) relay via Fuse -S234- (in fuse holder, position 34) for open circuit according to wiring diagram.
- Specified value: Wire resistance max 1.5 Ohms

Check activation of the Secondary Air Injection (AIR) pump relay







- Remove Secondary Air Injection (AIR) pump relay from position -2- of 3-pin relay carrier, E-box, plenum chamber.
- Connect test box to wiring harness of Engine Control Module (ECM), ECM is not connected. Test Box, Connecting For Wiring and Component Test







- Check the following wire connection for open circuit according to wiring diagram:

3-pin relay carrier, E-box plenum chamber, position 2 Terminal Testbox Socket
6 46

Specified value: Wire resistance max 1.5 Ohms

- Check the wire for short circuit to B+ and Ground (GND).
- Specified value:Infinite Ohms (no continuity)

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

Check voltage supply of the Secondary Air Injection (AIR) pump motor







- Disconnect electrical harness connector -1- at Secondary Air Injection (AIR) Pump Motor -V101-.

NOTE: Disregard the other items.







- Connect voltage tester, e.g. V.A.G.1527 B, between terminals 1 and 2.
- Connect test box to wiring harness of Engine Control Module (ECM), ECM is not connected. Test Box, Connecting For Wiring and Component Test
- Bridge terminals 1 and 46 at test box using wires e.g. from V.A.G 1594 A adapter test kit.
- LED must light up.

If LED does not light up:
- Check wire connection from terminal 2 of harness connector to Secondary Air Injection (AIR) Pump Relay -J299- (in 3-pin relay carrier, E-Box, plenum chamber, position 2) for open circuit according to wiring diagram.
- Check wire connection from terminal 1 of harness connector to Ground (GND) for open circuit according to wiring diagram.
- Specified value: Wire resistance max 1.5 Ohms

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

Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
1. Check DTC memory see "Mode 3: Check DTC memory". Mode 3: Check DTC Memory
2. If necessary, erase DTC memory see "Mode 4: Reset/erase diagnostic data". Mode 4: Reset/Erase Diagnostic Data
3. Generate readiness code. Readiness Code, Generating

- End diagnosis and switch ignition off.