Audi Workshop Service and Repair Manuals

Special tools, testers and workshop equipment required

• ◆ V.A.G 1526 A
• ◆ V.A.G 1527 B
• ◆ V.A.G 1594 A
• ◆ V.A.G 1598/31

Installation position => Overview installation positions - Page 24-5

Test sequence

• ‒ Start the final control diagnosis and activate secondary air pump relay -J299
  .

• ‒ → Secondary air pump relay (in 3-position relay carrier in plenum chamber electronics box on left, position 2) must be energised and secondary air pump motor -V101 must run in intervals.

A - If relay is not energised:

• ‒ Check voltage supply of secondary air pump relay => Page 24-113.
• ‒ Check actuation of secondary air pump relay => Page 24-115.

B - If relay is energised but secondary air pump motor does not run:

• ‒ Check voltage supply of secondary air pump motor => Page 24-116.

Check voltage supply of secondary air pump relay

• ‒ Switch off ignition.
• ‒ Pull off secondary air pump relay.
• ‒ Connect up multimeter as follows to measure voltage.

• ‒ Specified value: approx. battery voltage

If the specified value is not attained:

• ‒ Carry out the following tests (marked with dots):

• ● → Check fuse S130 (40 A) in 3-position relay carrier in E-box of plenum chamber, position 7
• ● Check for open circuit in wiring from battery-+ (terminal 30) to fuse S130 for secondary air pump relay -J299 (in 3-position in E-box of plenum chamber , position 2).

=> "Current Flow Diagrams, Electrical Fault Finding and Installation locations" binder

• ‒ Connect up multimeter as follows to measure voltage.

• ‒ Operate starter briefly.
• ‒ Specified value: approx. battery voltage

If the specified value is not attained:

• ‒ Carry out the following tests (marked with dots):

• ● → Check fuse S234 (in fuse holder, position 34).
• ● Check for open circuit in wiring from secondary air pump relay -J299 (in 3-position relay carrier in E-box of plenum chamber) via fuse S234 (in fuse box, position 34) to fuel pump relay.

=> "Current Flow Diagrams, Electrical Fault Finding and Installation locations" binder

Check actuation of secondary air pump relay

• ‒ Switch off ignition.
• ‒ Pull off secondary air pump relay.
• ‒ Connect voltage tester V.A.G 1527 B as follows:

• ‒ Start the final control diagnosis and activate secondary air pump relay -J299
  => Page 01-37.
• ‒ The LED should flash.

If LED does not flash:

• ‒ Switch off ignition.
• ‒ Connect the V.A.G 1598/31 test box to wiring harness leading to engine control unit; engine control unit should not be connected => Page 24-20.

• ‒ Check for open circuit and short to positive or earth in the following wiring connections:

• ‒ Rectify any open/short as necessary.

If no fault is found:

• ‒ Replace secondary air pump relay
  -J299.

Check voltage supply for secondary air pump motor

• ‒ Pull plug off secondary air pump motor -V101.
• ‒ Connect up voltage tester V.A.G 1527 B between contacts 1 and 2.
• ‒ Start the final control diagnosis and activate secondary air pump relay -J299
  => Page 01-37.
• ‒ The LED should flash.

If LED does not flash:

• ‒ Carry out the following tests (marked with dots):

• ● Check for open circuit in wiring from plug at motor -V101 to secondary air pump relay -J299 (in 3-position relay carrier in E-box of plenum chamber, position 2).

=> "Current Flow Diagrams, Electrical Fault Finding and Installation locations" binder

• ● Check for open circuit in wiring between plug at motor -V101 and earth connection 1 in engine compartment wiring harness.

=> "Current Flow Diagrams, Electrical Fault Finding and Installation locations" binder

If no fault is found:

• ‒ Replace secondary air pump motor
  -V101.