Checking secondary air pump relay J299 or J316 and activation — AUDI

Checking
secondary air pump relay
J299
or
J316
and activation
Special tools and workshop equipment required
Hand-held multimeter
V.A.G 1526 A
or
V.A.G 1526 B
Voltage tester
V.A.G 1527 B
Auxiliary measuring set
V.A.G 1594 A
or
V.A.G 1594 C
Test box
V.A.G 1598/22
(vehicles with throttle cable)
Test box
V.A.G 1598/31
(vehicles with electronic throttle)
Vehicle diagnostic, testing and information system
VAS 5051
with
diagnosis lead
VAS 5051/1
Test conditions
Vehicle diagnostic, testing and information system
VAS 5051
with
diagnosis lead
VAS 5051/1
is connected; vehicle self-diagnosis and vehicle system
“01 - Engine electronics”
is selected. When doing this, the ignition must be switched on.
Fault memory of engine control unit interrogated.
Test sequence
Display on
VAS 5051
From the menu
1
select the diagnostic function
“03 - Final control diagnosis”
.
Tap the
→
key repeatedly until the
secondary air pump relay
J299
or
J316
is activated.
The
secondary air pump relay
J299
or
J316
item 2
(located in electronics box in plenum chamber) should pick up and the
secondary air pump motor
V101
should start up intermittently.
Exit function
“03 - Final control diagnosis”
by pressing the
←
key, and switch off the ignition.
A - If the relay does not pick up:
Check voltage supply of
secondary air pump relay
J299
or
J316
Anchor
.
Check activation of
secondary air pump relay
J299
or
J316
Anchor
.
B - If the relay picks up but the
secondary air pump motor
V101
does not run:
Check voltage supply for
secondary air pump motor
V101
Anchor
.
Checking voltage supply of
secondary air pump relay
J299
or
J316
Run windscreen wipers to the vertical position.
Detach rubber seal from plenum chamber cover in direction of
arrow
.
Detach plenum chamber cover
1
towards the front.
Remove cover for electronics box in plenum chamber
arrows
.
Disconnect
secondary air pump relay
J299
or
J316
item 2
.
Connect multimeter (voltage measuring range) between relay socket, contact
8
and earth.
Specification: approx. battery voltage
If specification is not obtained:
Check
secondary air pump fuse
S130
in position
4
on relay and fuse holder in electronics box (plenum chamber).
Use current flow diagram to check for open circuit in wiring from battery + (terminal 30), via
secondary air pump fuse
S130
in position
4
, to
secondary air pump relay
J299
or
J316
item 2
in electronics box (plenum chamber).
Connect multimeter (voltage measuring range) between relay socket, contact 4 and earth.
Operate the starter briefly.
Specification: approx. battery voltage
If specification is not obtained:
Repair wiring harness according to current flow diagram.
Checking activation of
secondary air pump relay
J299
or
J316
Switch off ignition.
Disconnect
secondary air pump relay
J299
or
J316
.
Connect up
voltage tester
V.A.G 1527 B
between relay socket contact
6
and battery positive.
Repeat function
“03 - Final control diagnosis”
.
Tap the
→
key repeatedly until the
secondary air pump relay
J299
or
J316
is activated.
The LED should flash.
Exit function
“03 - Final control diagnosis”
by pressing the
←
key, and switch off the ignition.
If the LED does not flash:
Connect
test box
V.A.G 1598/22
or
V.A.G 1598/31
to wiring harness leading to engine control unit, but do not connect engine control unit itself
Rep. gr.
24
.
Check for open circuit and short to positive or earth in the following wiring:
Vehicles with throttle cable:
Relay socket
contact
Test box
V.A.G 1598/22
Socket
6
30
Vehicles with electronic throttle:
Relay socket
contact
Test box
V.A.G 1598/31
Socket
6
46
All vehicles:
Repair wiring connection if necessary.
If no fault in wire is detected:
Renew
secondary air pump relay
J299
or
J316
.
Checking voltage supply for
secondary air pump motor
V101
Remove noise insulation
arrows
.
Unplug electrical connector
2
at
secondary air pump motor
V101
item 1
.
Connect
voltage tester
V.A.G 1527 B
between contacts
1
and
2
.
Repeat function
“03 - Final control diagnosis”
.
Tap the
→
key repeatedly until the
secondary air pump relay
J299
or
J316
is activated.
The LED should flash.
Exit function
“03 - Final control diagnosis”
by pressing the
←
key, and switch off the ignition.
If the LED does not flash:
Use current flow diagram to check for open circuit in wiring between connector at
secondary air pump motor
V101
and
secondary air pump relay
J299
or
J316
,
item 2
(in electronics box in plenum chamber).
Use current flow diagram to check for open circuit in wiring between connector at
secondary air pump motor
V101
and earth.
If no fault is found:
Renew secondary air pump.