Ect Sensor Inspection - Toyota 1 MZ–FE Manual

EG2–364
Check for Tester connection
Voltage 1 – Ground
Resistance
2–3
Continuity 4 – Ground
Continuity 5 – Ground
8 – Ground
Continuity
9–10
Resistance
1MZ–FE ENGINE –
3. INSPECT COOLING FAN ECU
(a) Connect the cable to the negative (–) terminal of the
battery.
(b) Check the connector on the wiring harness side as
shown in the chart.
Condition
Ignition switch ON
Solenoid valve at cold (25°C (77°F) )
Throttle valve open
Throttle valve closed
A/C pressure SW connector disconnected
A/C pressure SW connector connected
Coolant temperature at 80°C (176°F)
(c) Disconnect the cable from the negative (–) terminal
of the battery.
4. RECONNECT COOLING FAN ECU CONNECTOR
5. RECONNECT NEGATIVE (–) TERMINAL CABLE TO
BATTERY

ECT SENSOR INSPECTION

INSPECT ECT SENSOR
Using an ohmmeter, measure the resistance between
the terminals.
Resistance:
1.48 – 1.58 Ω at 80
If the resistance is not as specified, replace the
sensor.
FE ENGINE – COOLING SYSTEM
° °
C (176 F)
Specified value
Battery voltage
7.6 – 8.0W
Continuity
No continuity
Continuity
No continuity
Continuity
1.48 – 1.58 kW