Suzuki WagonR+ RB310 Service Manual page 2616

"V "
"GND"
B
1. Viewed from terminal side
Sensor-1
Sensor-2
ENGINE AND EMISSION CONTROL SYSTEM 6E-29
HEATED OXYGEN SENSOR (Sensor-1 and Sensor-2)
Oxygen Sensor Heater Inspection
1) Disconnect sensor coupler.
2) Using ohmmeter, measure resistance between terminals "V
and "GND" of sensor coupler.
NOTE :
Temperature of sensor affects resistance value largely.
Make sure that sensor heater is at correct temperature.
Resistance of oxygen sensor heater :
11.7 – 15.6 Ω at 20_C, 68_F
If found faulty, replace oxygen sensor.
3) Connect sensor coupler securely.
Removal
WARNING:
To avoid danger of being burned, do not touch exhaust sys-
tem when system is hot. Oxygen sensor removal should be
performed when system is cool.
1) Disconnect negative cable at battery.
2) For sensor-1, remove exhaust manifold cover (1) and discon-
nect coupler of heated oxygen sensor and release its wire har-
ness from clamps.
3) For sensor-2, hoist vehicle and disconnect coupler of heated ox-
ygen sensor and release its wire harness from clamp.
4) Remove heated oxygen sensor (2) from exhaust manifold or ex-
haust pipe.
Installation
Reverse removal procedure noting the following.
D Tighten heated oxygen sensor (2) to specified torque.
Tightening Torque for heated oxygen sensor
(a): 45 N·m (4.5 kg-m, 32.5 lb-ft)
D Connect coupler of heated oxygen sensor (2) and clamp wire har-
ness securely.
D After installing heated oxygen sensor (2), start engine and check
that no exhaust gas leakage exists.
"
B