Air Injection Pump Relay: Testing and Inspection

Secondary air injection (AIR) Pump relay -J299-/ Secondary air injection (AIR) pump motor -V101-,Checking

Special tools and equipment





^ V.A.G 1526 A
^ V.A.G 1527 B
^ V.A.G 1594 A
^ V.A.G 1598/31
^ VAS 5051 with VAS 5051/1
or
^ V.A.G 1551 with V.A.G 1551/3 A

Test requirements:
^ Vehicle diagnostic, testing and information system VAS 5051 or V.A.G 1551 Scan Tool.

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





^ The secondary air injection pump relay-2- (in electronics box of plenum chamber, left) must respond and secondary air injection pump motor V101- must run intermittently.

A - If relay does not respond:
- Check voltage supply of secondary air pump relay.
- Check actuation of secondary air injection pump relay.

B - If relay responds but secondary air injection pump motor does not run:
^ Check voltage supply of secondary air injection pump motor.

Check voltage supply of secondary air injection pump relay
^ Switch ignition off.
^ Remove secondary air injection pump relay.





^ Connect multimeter as follows to measure voltage.





^ Specified value: approximately battery voltage

If specified value is not attained:
^ Carry out following tests:





^ Check fuse S130 (40A) in electronics box of plenum chamber, (Pos. 4).
^ Check for open circuit in wiring from battery + (terminal 30) to fuse S130 for secondary air injection pump relay (in 3-position in E-box of plenum chamber, position 2).





^ Connect multimeter as follows to measure voltage.





^ Operate starter briefly.
- Specified value: approximately battery voltage

If specified value is not attained:
^ Carry out following tests:





^ Check fuse S234 (in fuse box, position 34).

^ Check for open circuit in wiring from secondary air injection pump relay (in 3-position relay carrier in E-box of plenum chamber) via fuse S234 (in fuse box, position 34) to fuel pump relay.

Check actuation of secondary air pump relay
^ Switch ignition off.
^ Remove secondary air injection pump relay.





^ Connect voltage tester VAG 1527 B as follows:





^ Initiate output Diagnostic Test Mode (DTM) and activate secondary air injection pump relay.
- LED must flash.

If LED does not flash:
^ Switch ignition off.
^ Connect VAG 1598/31 test box to wiring harness leading to engine control module; engine control module should not be connected:





^ Check for open circuit and short to positive or Ground in the wiring connection:





^ Repair any open/short circuit as necessary.

If no fault is found:
^ Replace Secondary Air Injection Pump relay -J299-

Check voltage supply for secondary air injection pump motor





^ Remove sound insulation -arrows-.





^ Disconnect connector from Secondary Air Injection (AIR) Pump motor -V101- (-arrow-).
- Location: Right front in engine compartment below air filter housing





^ Connect voltage tester V.A.G 1527 B between contacts 1 and 2.
^ Initiate output Diagnostic Test Mode (DTM) and activate Secondary Air Injection (AIR) Pump relay -J299-.
- LED must flash.

If LED does not flash:
^ Carry out following tests:
- Check wiring connection from contact 1 of connector to secondary air injection pump relay (in 3-pin relay carrier in electronic box (plenum chamber), for open circuit.

^ Check wiring connection of contact 2 of connector to Ground for open circuit:

If no fault is found:
^ Replace Secondary Air Injection (AIR) Pump motor -V101-.