AUDI A4 1996 B5 / 1.G AFC Engine EVAP Canister Purge Regulator Valve Checking Workshop Manual
Page 1 of 3
24-58
EVAP canister purge regulator
valve, checking
Notes:
For a functional check of the EVAP canister
purge regulator valve duty cycle (triggering)
Repair Group 01, Read measuring value block,
display group 030, display field 3.
Component locations page 24
-1 .
Checking resistance
- Disconnect EVAP canister purge regulator valve
harness connector.
If the specified value is not obtained: - Measure resistance of EVAP canister purge regulator valve.
Specified value: 20 to 28 - Replace EVAP canister purge regulator valve.
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Page 2 of 3
24-59
Checking voltage supply
- Disconnect EVAP canister purge regulator valve
harness connector.
If voltage tester does not light up: - Connect VAG 1527B voltage tester between connector terminal 1 and
engine Ground (GND) using jumper wires from connector test kit VW
1594.
- Use scan tool "Output Diagnostic Test Mode" function 03 to trigger fuel
pump relay -J17- page 01
-145
.
Voltage tester must light up
- Check fuse for EVAP canister purge regulator valve.
- Check wiring for continuity between EVAP canister purge regulator
valve connector terminal 1 and fuse, using wiring diagram.
- Check fuel pump relay and triggering page 24
-24
.
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purge re
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Page 3 of 3
24-60
Checking triggering
If voltage tester does not flash or lights up constantly: - Connect voltage tester VAG 1527 between EVAP canister purge
regulator valve connector terminals 1 (B+) and 2 using jumper wires
from connector test kit VW 1594.
- Use scan tool "Output Diagnostic Test Mode" function 03 to trigger
EVAP canister purge regulator valve page 01
-145
.
Voltage tester must flash
- Connect VAG 1598/19 test box to ECM page 01
-255
.
If voltage tester lights up constantly:
If voltage tester does not flash:
If there is neither a break nor a short: - Check wiring between EVAP canister purge regulator valve connector
terminal 2 and test box socket E12 (GND).
- Check wiring for continuity between EVAP canister purge regulator
valve connector terminal 2 and test box socket E12.
Specified value: max. 1.0 - If necessary, eliminate short or open circuit in wiring.
- Replace ECM page 01
-265
.
Pa
ge 3 of 3 EVAP canister
purge re
gulator valve, checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.24.15