Heated Oxygen Sensor (Ho2S-1 And Ho2S-2) - Suzuki Ignis Service Manual

ENGINE AND EMISSION CONTROL SYSTEM 6E1-31

HEATED OXYGEN SENSOR (HO2S-1 AND HO2S-2)

OXYGEN SENSOR HEATER INSPECTION
1) Disconnect sensor connector.
2) Using ohmmeter, measure resistance between terminals
"V " and "GND" of sensor connector.
B
If found faulty, replace oxygen sensor.
NOTE:
Temperature of sensor affects resistance value largely.
Make sure that sensor heater is at correct temperature.
Resistance of oxygen sensor heater
HO2S-1 : 5.0 – 6.4 Ω at 20°C (68°F)
HO2S-2 : 11.7 – 14.3 Ω at 20°C (68°F)
3) Connect sensor connector securely.
1. Viewed from terminal side
REMOVAL
WARNING:
To avoid danger of being burned, do not touch exhaust
system when system is hot. Oxygen sensor removal
should be performed when system is cool.
1) Disconnect negative cable at battery.
2) For HO2S-1, disconnect connector of heated oxygen sensor
and release its wire harness from clamps, then remove front
bumper and heat insulator panel.
3) For HO2S-2, disconnect connector of heated oxygen sensor
and release its wire harness from clamp and hoist vehicle.
4) Remove heated oxygen sensor (1) from exhaust manifold or
exhaust pipe.
INSTALLATION
Reverse removal procedure noting the following.
• Tighten heated oxygen sensor (1) to specified torque.
Tightening torque
Heated oxygen sensor (a) : 45 N·m (4.5 kg-m, 32.5 lb-ft)
• Connect connector of heated oxygen sensor (1) and clamp
wire harness securely.
• After installing heated oxygen sensor (1), start engine and
check that no exhaust gas leakage exists.
[A] : HO2S-1
[B] : HO2S-2