Page 9 of 12
24-142
Checking for blockage and leaks
The EVAP canister purge regulator valve is
closed when power is off.
- Remove EVAP canister purge regulator valve -
N80- (component locations Page 24
-1 )
- Connect removed valve to harness connector.
- Start output Diagnostic Test Mode (DTM) and
select -N80- Page 01
-42
.
- Blow into long connection during output DTM,
and check whether valve opens and closes
properly. Replace valve if necessary.
- If valve is OK, check all hose connections
between tank and valve for blockage or leaks.
EVAP canister purge regulator valve -N80-
electrical test
- Disconnect harness connector from EVAP
canister purge regulator valve.
- Connect multimeter US 1119 (Fluke 83 or equivalent) and check
resistance at across valve terminals.
Pa
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porative Emissions
(EVAP
) system, checkin
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11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.FU02.24.4
Page 10 of 12
If resistance is NOT OK:
Specified value: 22-30 - Replace EVAP canister purge regulator valve
Pa
ge 10 of 12 Eva
porative Emissions
(EVAP
) system, checkin
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11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.FU02.24.4
Page 11 of 12
24-143
Checking EVAP canister purge regulator
valve voltage supply
Test conditions
Fuse for EVAP canister purge regulator
valve OK.
- Disconnect harness connector from EVAP
canister purge regulator valve.
If LED test light does not light:
If wiring is OK: - Connect VAG 1527B LED voltage tester between connector terminal 1
and engine Ground.
- Operate starter motor.
Specified value: LED must light up
- Check wiring for open circuit between connector terminal 1 and fuse,
according to wiring diagram. Repair if necessary.
- Check fuel pump relay Page 24
-81
.
Pa
ge 11 of 12 Eva
porative Emissions
(EVAP
) system, checkin
g
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.24.4
Page 12 of 12
24-144
Checking signal to EVAP canister purge
regulator valve
If LED test light does not blink, or stays on: - Connect VAG 1527B LED voltage tester between connector terminals
1 (B+) and 2.
- Start output Diagnostic Test Mode (DTM) for EVAP canister purge
regulator valve -N80 - Page 01
-42
.
LED must blink
- Connect VAG 1598/22 test box to ECM harness connector Page 01
-
56
.
If wiring is OK: - Check wiring for open circuit or short circuit to B+ between connector
terminal 2 and Motronic ECM terminal 15.
- Replace Motronic ECM -J220- Page 01
-57
.
- Carry out adaptation of throttle valve control module to ECM Page
24
-119
.
- Check readiness code Page 01
-59
. If Diagnostic Trouble Code
(DTC) memory has been erased, or ECM was disconnected, generate
new readiness code Page 01
-62
.
Pa
ge 12 of 12 Eva
porative Emissions
(EVAP
) system, checkin
g
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.24.4
