':.·,·.
PGM-FI SYSTEM
4-20
DTC
7-1
(ECT SENSOR LOW
VOLTAGE)
1. ECT Sensor System Inspection
Turn the ignition switch
ON
and engine stop switch
"O".
Check the ECT sensor with the MCS tester.
Is about O Vindicated?
YES -
GO TO STEP 2.
NO -
Intermittent failure
2. ECT Sensor Inspection
Turn the ignition switch OFF.
Disconnect the ECT sensor 2P (Black) connector.
Turn the ignition switch ON.
Check the ECT sensor with the MCS tester.
Is about O Vindicated?
YES -
GO TO STEP 4.
NO -
GO TO STEP
3.
3. ECT Sensor Resistance Inspection
Turn the ignition switch OFF.
Measure the resistance at the 2P connector
[1]
terminals
of
the ECT sensor side.
CONNECTION:
A-
B
STANDARD: 2.3 - 2.6 kQ (20°C/68°F)
Is the resistance within
2.3-
2.6 kD?
YES -
Replace the ECM with a new one and
rech.eck.
NO -
Faulty ECT sensor
4. ECT Sensor Output
line
Short Circuit Inspection
Turn the ignition switch OFF.
Disconnect the ECM
21
P (Gray) connector.
Check for continuity between the ECT sensor
2P
(Black) connector
[1]
terminal of the wire harness
side
and
ground with ECM
21
P (Gray) connector
disconnected.
CONNECTION: Pink/white - ground
STANDARD: No continuity
Is
there continuity?
YES -
Short circuit
in
the Pink/white wire
NO -
Replace the ECM with a known good one
and recheck.
A
[1]
[1]
Pink/white
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