Heated Oxygen Sensor (Ho2S-1 And Ho2S-2) Heater On-Vehicle Inspection (If Equipped); Heated Oxygen Sensor (Ho2S-1 And Ho2S-2) Removal And Installation (If Equipped) - Suzuki 2006 SX4 Service Manual

1C-8 Engine Electrical Devices:
Heated Oxygen Sensor (HO2S-1 and HO2S-2)
Heater On-Vehicle Inspection (If Equipped)
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 – 14.5 Ω at 20 °C (68 °F)
Viewed from terminal side
[A]: HO2S-1
3) Connect sensor connector securely.
Heated Oxygen Sensor (HO2S-1 and HO2S-2)
Removal and Installation (If Equipped)
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) Disconnect connector of heated oxygen sensor and
release its wire harness from clamps.
3) Perform following items before removing heated
oxygen sensor.
a) For HO2S-1, remove exhaust manifold referring
to "Exhaust Manifold Removal and Installation in
Section 1K", if necessary.
b) For HO2S-2, hoist vehicle.
4) Remove heated oxygen sensor from exhaust pipe or
exhaust manifold.
S6RW0D1306010
I4RS0A130006-01
[B]: HO2S-2
S6RW0D1306011
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 kgf-m,
32.5 lb-ft)
• Install exhaust manifold referring to "Exhaust Manifold
Removal and Installation in Section 1K", if removed.
• Connect connector of heated oxygen sensor (1) and
clamp wire harness securely.
• After installing heated oxygen sensor, start engine
and check that no exhaust gas leakage exists.
[A]
1, (a)
[B]
[A]: HO2S-1
1, (a)
I3RM0A130007-01
[B]: HO2S-2