Suzuki Wagon R Manual page 1305

1. Viewed from terminal side
Sensor-1
1. Exhaust manifold
2. Heated oxygen sensor
Sensor-2
ENGINE AND EMISSION CONTROL SYSTEM 6E1-23
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 – 14.3 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 system
when system is hot. Oxygen sensor removal should be per-
formed when system is cool.
1) Disconnect negative cable from battery.
2) Hoist vehicle when removing sensor-2.
3) Disconnect coupler of heated oxygen sensor and release its
wire harness from clamps.
4) Remove exhaust manifold cover when removing sensor-1.
5) Remove heated oxygen sensor from exhaust manifold or ex-
haust No.1 pipe.
INSTALLATION
Reverse removal procedure noting the following.
D Tighten heated oxygen sensor to specified torque.
Tightening Torque
.
(a): 45 N m (4.5 kg-m, 32.5 lb-ft)
D Connect coupler of heated oxygen sensor and clamp wire har-
ness securely.
D After installing heated oxygen sensor, start engine and check that
no exhaust gas leakage exists.
"
B