Suzuki Boulevard M50, Service Manual

Page: 202 / 454

FI SYSTEM 5-45
Step 2
1) Turn the ignition switch OFF.
2) Loosen the inlet pipe screw.
3) Lift up the inlet pipe
1
.
4) Disconnect the ECT sensor coupler.
5) Measure the ECT sensor resistance.

ECT sensor resistance:
Approx. 2.3 – 2.6 k
Ω
at 20 °C (68 °F)
(Terminal – Terminal)

09900-25008: Multi-circuit tester set

Tester knob indication: Resistance (
Ω
)
Refer to next page for details.
Is the resistance OK?
6) After repairing the trouble, clear the DTC using SDS tool.
(

5-25)

ECT sensor specification
2 2
YES
• B/Bl or B/Br wire open or shorted to ground, or
poor
D
or
I
connection
• If wire and connection are OK, intermittent trou-
ble 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.
NO Replace the ECT sensor with a new one.
Engine Coolant Temp. Resistance
20 °C (68 °F) Approx. 2.45 k
Ω
40 °C (104 °F) Approx. 1.148 k
Ω
60 °C (140 °F) Approx. 0.587 k
Ω
80 °C (176 °F) Approx. 0.322 k
Ω
2
ECM coupler (Harness side)
2
SA
MP
LE