1C-7 Engine Electrical Devices:
Installation
Reverse removal procedure noting the following.
• Clean mating surfaces of ECT sensor and water outlet
cap.
• Check O-ring for damage and replace, if necessary.
• Tighten ECT sensor (1) to specified torque.
Tightening torque
ECT sensor (a): 12.5 N·m (1.25 kgf-m, 9.0 lb-ft)
• Connect connector to ECT sensor securely.
• Refill coolant referring to “Cooling System Flush and
Refill: in Section 1F”.
Engine Coolant Temperature (ECT) Sensor
Inspection
S5JB0A1306009
Immerse temperature sensing part of ECT sensor 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.
Air Fuel Ratio (A/F) Sensor On-Vehicle
Inspection
S5JB0A1306028
Heater
1) Disconnect A/F sensor connector.
2) Using ohmmeter, measure resistance of Sensor
heater between terminals “V
B
” and “GND” at sensor
connector. If found faulty, replace A/F sensor.
NOTE
Temperature of sensor affects resistance
value largely. Make sure that sensor heater is
at correct temperature.
A/F sensor heater resistance
2 – 3
Ω
at 20
°
C (68
°
F)
Viewed from terminal side
3) Connect A/F sensor connector securely.
Adjusting Resistor
1) Disconnect A/F sensor connector.
2) Using ohmmeter, measure resistance of adjusting
resistor between terminals “R+” and “R–” at A/F
sensor connector.
If found faulty, replace A/F sensor.
Adjusting resistor resistance
100 – 58000
Ω
at 20
°
C (68
°
F)
Viewed from terminal side
3) Connect A/F sensor connector securely.
[A]: For J20 engine
[B]: For M16 engine
[A]: Lower limit
[D]: Resistance
[B]: Normal
[E]: Temperature
[C]: Upper limit
[B]
[A]
1, (a)
1, (a)
I5JB0A130023-02
20
0
68
32
104
140
176
40
60
80
[E]
2.29 - 2.62
0.309 - 0.331
[A]
[B]
[C]
[D]
I5JB0A130037-01
“GND”
“V
B
”
I5JB0A130001-02
“R+”
“R
−
”
I5JB0A130002-02
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