FI SYSTEM DIAGNOSIS 4-45
Step 3
ECT sensor check
1) Turn the ignition switch OFF.
2) Drain a small amount of engine coolant. (
2-15)
3) Disconnect the ECT sensor coupler
1
and remove the ECT
sensor
2
.
4) Measure the ECT sensor resistance.
NOTE:
Refer to “ECT SENSOR INSPECTION” for details. (
7-10)
09900-25008: Multi circuit tester set
Tester knob indication: Resistance (
)
ECT sensor resistance:
Approx. 2.45 k
at 20 °C (68 °F)
(Terminal – Terminal)
Is check result OK?
5) Install the ECT sensor. (
7-10)
3
YES
Replace the ECM with a known good one, and
inspect it again.
NO
Replace the ECT sensor with a new one.
3
