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Checking wiring for Oxygen Sensor (O2S) 2
Behind Three Way Catalytic Converter (TWC)
-G131
Component location of 4-pin harness connector
of oxygen sensor Page 24
-5 .
- Disconnect 4-pin connector for Oxygen Sensor
(O2S) 2 Behind Three Way Catalytic Converter
(TWC) -G131
- Connect VAG1598/31 test box to wiring harness
for engine control module. Do not connect to the
engine control module itself Page 24
-20
.
Electrical Wiring Diagrams, Troubleshooting & Component Locations - Check following wiring connections for open circuits:
Connector on wiring harness,
socket
VAG1598/31 test box socket
3 10
4 11
Resistance in wiring: max. 1.5 ohm
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Electrical Wiring Diagrams, Troubleshooting & Component Locations
Electrical Wiring Diagrams, Troubleshooting & Component Locations
If no malfunctions are identified in the wiring: - Check wiring also on 4-pin harness connector for short circuits to each
other.
Connector on wiring harness,
socket
VAG1598/31 test box socket
4 10
Specified value: infinite ohms (open circuit)- Check shielded wire for short circuit to sensor wiring.
Connector on wiring harness,
socket
VAG1598/31 test box socket
4 32
3 32
Specified value: infinite ohms (open circuit)- Replace Motronic Engine Control Module (ECM) -J220 Page 24
-24
.
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If no malfunction can be identified in the wiring:
- Replace Motronic Engine Control Module (ECM)
-J220 Page 24
-24
.
- Display readiness code Page 01
-101
. The
readiness code must be generated if the DTC
memory was erased Page 01
-105
.
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Oxygen sensors, removing and
installing
Removing
- Disconnect harness connector of particular
oxygen sensor before catalytic converter for
bank 1 and bank 2 (component location Page
24
-5 ).
- Disconnect harness connector of particular
oxygen sensor behind catalytic converter for
bank 1 and bank 2 (component location Page
24
-5 ).
- Remove particular oxygen sensor with 3337/7
special tool.
- Lower transmission, in order to remove oxygen
sensors behind catalytic converter.
Repair Manual, 6 Spd. Manual Transmission
01E, Repair Group 34, Transmission removing and installing.
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When installing observe the following:
Note:
The wiring from the oxygen sensor must be
fastened at the exact location as previously
installed, to avoid contact with exhaust pipe.
The oxygen sensor threads are coated with a
tread sealing compound that must not come in
contact with the slits in the sensor tip.
Tightening torque: 55 Nm (41 ft lb)
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