GDI -
On-vehicle Service
13I-126
OXYGEN SENSOR CHECK
<Oxygen sensor (front)>
1. Disconnect the oxygen sensor connector and connect
the special tool (harness set) to the connector on the
oxygen sensor side.
2. Make sure that there is continuity (4.5 - 8.0
W
at 20
_
C)
between terminal 3 and terminal 4 on the oxygen sensor
connector.
3. If there is no continuity, replace the oxygen sensor.
4. Warm up the engine until engine coolant is 80
_
C or higher.
5. Use a jumper wire to connect terminal 3 of the oxygen
sensor connector to the battery (+) terminal and terminal
4 to the battery (- ) terminal.
Caution
Be very careful when connecting the jumper wire;
incorrect connection can damage the oxygen sensor.
6. Connect a digital voltage meter between terminal 1 and
terminal 2.
7. While repeatedly racing the engine, measure the oxygen
sensor output voltage.
Standard value:
Engine Oxygen sensor
output voltage
Remarks
When racing
the engine
0.6 - 1.0 V If you make the air/fuel
ratio rich by racing the
engine repeatedly, a nor-
mal oxygen sensor will
output a voltage of 0.6 -
1.0 V.
8. If the sensor is defective, replace the oxygen sensor.
NOTE
For removal and installation of the oxygen sensor, refer
to GROUP 15 - Exhaust Pipe and Main Muffler.
Equipment side connector
Oxygen sensor
(front)
MB991223
Jumper wire
MB991223
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