Honda SH300I 2006, Manual

Page: 143 / 511

FUEL SYSTEM (PGM-FI)
6-33
2. ECT sensor Output Voltage Inspection
Turn the ignition switch OFF.
Disconnect the ECT sensor 3P (Gray) connector.
Turn the ignition switch ON and engine stop
switch "
".
Measure the voltage at ECT sensor connector of
the wire harness side.
Is the voltage within 4.75 – 5.25 V?
YES – GO TO STEP 3.
NO – GO TO STEP 4.
3. ECT Sensor Resistance Inspection
Turn the ignition switch OFF.
Measure the resistance at the ECT sensor termi-
nals.
Is the resistance within 2.3 – 2.6 k
Ω
(20
°
C/68
°
F)?
YES – Replace the ECM with a known good
one, and recheck; refer to Key Registra-
tion Procedures (page 23-4)
NO – Faulty ECT sensor.
4. ECT Sensor Output/Ground Line Open Circuit
Inspection
Turn the ignition switch OFF.
Check the continuity between the test harness
terminals and ECT sensor connector of the wire
harness side.
Is there continuity?
YES – GO TO STEP 5.
NO – • Open circuit in Pink/white wire
• Open circuit in Green/orange wire
Connection: Pink/White (+) – Green/Orange (–)
3P (Gray) CONNECTOR
(Wire side of female terminals)
P/W
G/O
Connection: Pink/white – Green/orange
(Sensor side terminals)
Standard: 2.3 – 2.6 k
Ω
(20
°
C/68
°
F)
3P (Gray) CONNECTOR
(Sensor side of male terminals)
P/W
G/O
Connection: A24 – Pink/white
A4 – Green/orange
3P (Gray) CONNECTOR
(Wire side of female terminals)
P/W
G/O
TEST HARNESS PIN BOX