Mitsubishi 1989-1993 GALANT Service Manual page 231

FUEL SYSTEM <SOHC-8 VALVE>
TSB Revision
SENSOR INSPECTION
Caution
1. Before checking, warm up the engine until engine
coolant temperature reaches 85 to 95°C (185 to 205°F).
2. Use an accurate digital voltmeter.
(1) Disconnect the oxygen sensor connector and connect a
voltmeter to the oxygen sensor connector.
(2) While repeating engine racing, measure the oxygen sensor
output voltage.
Oxygen sensor
Engine
output voltage
Race
NOTE
For removal and installation of the oxygen sensor, refer to
GROUP 15-Exhaust Manifold.
Oxygen sensor installation torque: 40-50 Nm
Remarks
Make air-fuel mixture
rich by accelerator
operation
I
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