Engine General Information and Diagnosis: 1A-46
2 1) Turn the ignition switch OFF.
2) Connect the ECM coupler.
3) Disconnect the ECT sensor coupler.
4) Measure the ECT sensor resistance. Refer to “ECT
Sensor Inspection in Section 1C (Page 1C-4)” for
details.
Special tool
: 09900–25008 (Multi-circuit tester set)
Tester knob indication
Resistance (Ω)
ECT sensor resistance
Approx 2.45 kΩ at 20 °C (68 °F)
(Terminal – Terminal)
NOTE
Refer to “ECT Sensor Inspection in Section 1C
(Page 1C-4)” for details.
Is the resistance OK?
• B/Br or B/Bl wire
open or shorted to
ground, or poor “24”
or “11” connection.
• If wire and
connection are OK,
intermittent trouble or
faulty ECM.
• Recheck each
terminal and wire
harness for open
circuit and poor
connection.
• Replace the ECM
with a known good
one, and inspect it
again. Refer to “ECM
Removal and
Installation in Section
1C (Page 1C-1)”.
Replace the ECT
sensor with a new one.
Refer to “ECT Sensor
Removal and
Installation in Section
1C (Page 1C-4)”.
Step Action Yes No
I831G1110047-01
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