Golf GTI L4-1781cc 1.8L SOHC (HT) (1985)
Oxygen Sensor: All Technical Service Bulletins
Oxygen Sensor System - Checking
Applies To
GOLF
(U.S.. models with manual trans. only)
1985
Group 26
Subject
CIS With OXS System
Part Identifier
N/A
Key Points
Oxygen sensor system, checking
B
Number
85-01
April 17, 1985
Oxygen sensor system, checking
Work sequence
-
connect tester VW 1367 as follows
-
connect + lead to positive battery terminal
-
connect - lead to negative battery terminal
-
connect dwell lead to OXS test connection (blue/white and brown wires) using harness adaptor US 1112
-
press % button on testor VW 1367
-
disconnect ignition coil high tension wire from ignition distributor cap and connect to ground with jumper wire
-
remove fuel pump relay from fuse/relay panel
-
switch US 4480/3 OFF
-
connect US 4480/3 in place of fuel pump relay in fuse/relay panel
-
continue with test procedures
Frequency valve, checking
-
switch US 4480/3 ON
^
frequency valve must make buzzing noise
If YES
-
frequency valve OK, go to next test
If NO
-
frequency valve NOT OK, continue as follows
-
unplug frequency valve connector
-
check terminals of connector and frequency valve for correct position or damage