With Manufacturer's Scan Tool
Secondary Air Injection (AIR) Pump Relay -J299- And Secondary Air Injection (AIR) Pump Motor - V101-, Checking
Special tools and equipment
- VAG 1526 A Multimeter or equivalent
- VAG 1527 B Voltage tester
- VAG 1594 A Connector test set
- VAG 1598/31 Adapter
Requirement
- Vehicle Diagnostic, Testing and Information System VAS 5051 or VAG 1551 Scan Tool 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 Measure to
box in 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 Measure to
box in 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 VAG 1527 B as follows:
3-way relay carrier in electronics Measure to
box in 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 VAG 1598/31 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 Test box VAG 1598/31
box in plenum chamber, position socket
2,contact
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 VAG 1527 B 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-.