Suzuki SWIFT RS415 2017, Service Manual

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Engine Electrical Devices: 1C-5
Engine Coolant Temperature (ECT) Sensor
Inspection
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Immerse temperature sensing part of ECT sensor (1) in
water (or ice) and measure resistance between sensor
terminals while heating water gradually.
If measured resistance doesn’t show such characteristic
as shown, replace ECT sensor.
Heated Oxygen Sensor (HO2S-1 and HO2S-2)
Heater On-Vehicle Inspection
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1) Disconnect sensor connector.
2) Using ohmmeter, measure resistance between
terminals “V
B
” and “GND” of sensor connector.
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
:
at 20
q
C (68
q
F)
HO2S-2: 11.7 – 14.5
:
at 20
q
C (68
q
F)
Viewed from terminal side
3) Connect sensor connector securely.
Heated Oxygen Sensor (HO2S-1 and HO2S-2)
Removal and Installation
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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 (1) from exhaust
pipe or exhaust manifold.
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[A]: HO2S-1
[B]: HO2S-2
I4RS0A130006-