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Step 2
1) Turn the ignition switch OFF.
2) Measure the ECT sensor resistance.
_ ECT
sensor
resistance:
Approx.
2.3 - 2.6 kO at
20°C
(68
OF)
(Terminal - Terminal)
,gb 09900-25008: Multi
circuit
tester
set
~
Tester
knob
indication:
Resistance
(0)
Refer to page 7-8 for details.
Is the resistance OK?
• BIBI or BIBr wire open or shorted to ground, or
poor
® or
®J
connection.
•
If wire and connection are OK, intermittent trou-
YES
ble or faulty ECM.
•
Recheck each terminal and wire harness for
open circuit and poor connection.
NO Replace the ECT sensor with a new one.
Engine Coolant Temp Resistance
20°C
(68
OF)
Approx. 2.45
!ill
50°C
(122
OF)
Approx. 0.811 kQ
80°C
(176
OF)
Approx. 0.318 kQ
110°C
(230
OF)
Approx. 0.142 kQ
2
FI
SYSTEM
DIAGNOSIS
4-37
ECM couplers