Secondary Air Injection (AIR) Pump Relay J299 and Secondary Air Injection (AIR) Pump Motor V101 , Checking
Secondary Air Injection (AIR) Pump Relay J299 And Secondary Air Injection (AIR) Pump Motor V101, Checking
Special tools, testers and auxiliary items required
- Multimeter VAG1526A or equivalent
- Voltage tester VAG1527B
- Connector test set VAG1594A
- Adapter VAG1598/31
Requirement
- Vehicle Diagnostic, Testing and Information System VAS5051 or Scan Tool VAG1551 must be connected.
Work sequence
- Remove rubber seal from plenum chamber cover in direction of - arrow - .
- Pull plenum chamber cover - 1 - toward front and remove.
- Unbolt cover of electronics box in plenum chamber.
- Start output Diagnostic Test Mode and actuate Secondary Air Injection (AIR) pump relay J299 .
- Secondary AIR pump relay - 2 - (in 3-way relay carrier of electronics box at left side of plenum chamber, position 2) must pick up and Secondary AIR pump motor V101 must run intermittently.
A - If relay does not pick up:
- Check power supply of secondary AIR pump relay .
- Check actuation of secondary AIR pump relay .
B - If relay picks up, but secondary AIR pump motor does not run:
- Check power supply for secondary AIR pump motor .
Checking power supply of secondary AIR pump relay
- Switch off ignition.
- Disconnect secondary AIR pump relay.
- Connect multimeter and measure voltage as follows.
3-way relay carrier in electronics box in Measure to
plenum chamber, position 2, contact
8 Engine Ground
- Specification: approx. battery voltage
If reading does not match specification:
- Perform following checks marked with a dot:
- Check fuse S130 (40 A) in 3-way relay carrier of electronics box in plenum chamber, position 7.
- Check for open circuit in wiring from battery+ (terminal 30) to fuse S130 to Secondary AIR pump relay J299 (in 3-way relay carrier of electronics box in plenum chamber, position 2).
- Connect multimeter and measure voltage as follows.
3-way relay carrier in electronics box in Measure to
plenum chamber, position 2, contact
4 Engine Ground
- Briefly operate starter.
- Specification: approx. battery voltage
If reading does not match specification:
- Perform following checks marked with a dot:
- Check fuse S234 (in fuse box, position 34).
- Check for open circuit in wiring from Secondary AIR pump relay J299- (in 3-way relay carrier of electronics box in plenum chamber) to fuel pump relay via fuse S234 (in fuse box, position 34)
Checking actuation of secondary AIR pump relay
- Switch off ignition.
- Disconnect secondary AIR pump relay.
- Connect voltage tester VAG1527B as follows:
3-way relay carrier in electronics box in Measure to
plenum chamber, position 2, contact
6 Engine Ground
- Start output Diagnostic Test Mode and actuate Secondary AIR pump relay J299 .
- LED must flash
If LED does not flash:
- Switch off ignition.
- Connect test box VAG1598/31 to engine control module wiring harness. Engine control module must not be connected
- Check for open circuit and short to Ground/positive in following wiring connection:
3-way relay carrier in electronics box in Test box VAG1598/31
plenum chamber, position 2, contact Socket
6 66
- If necessary, eliminate open circuit/short circuit.
If no fault is found:
- Replace Secondary AIR pump relay J299.
Checking power supply for secondary AIR pump motor
- Remove sound insulation - arrows - .
- Disconnect connector from Secondary AIR pump motor V101 - arrow - .
- Location: right front in engine compartment below air cleaner housing
- Connect voltage tester VAG1527B between contacts 1 and 2.
- Start output Diagnostic Test Mode and actuate Secondary AIR pump relay J299 .
- LED must flash
If LED does not flash:
- Perform following checks marked with a dot:
- Check for open circuit in wiring from contact 1 of connector to secondary AIR pump relay J299 (in 3-way relay carrier in electronics box of plenum chamber, position 2).
- Check for open circuit in wiring from contact 2 of connector to Ground
If no fault is found:
Replace Secondary Air Injection (AIR) pump motor V101.