Suzuki AN400 Service Manual page 98

1A-35 Engine General Information and Diagnosis:
Step
1 7) If OK, then measure the voltage between Dg wire
terminal and B/Bl wire terminal.
ECT sensor voltage
4.5 – 5.5 V
(Positive terminal: Dg – Negative terminal: Ground,
Positive terminal: Dg – Negative terminal: B/Br)
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
Dg
Is the voltage OK?
2 1) Turn the ignition switch OFF.
2) Measure the ECT sensor resistance.
ECT sensor resistance
Approx. 2.58 kΩ at 20 °C (68 °F) (Terminal – Terminal)
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Resistance (Ω)
Is the resistance OK?
Engine coolant temp.
20 °C (68 °F)
50 °C (122 °F)
80 °C (176 °F)
110 °C (230 °F)
Action
B/Br
(A)
(A)
Approx. 2.58 kΩ
Approx. 0.77 kΩ
Approx. 0.28 kΩ
Approx. 0.12 kΩ
Go to Step 2.
V
I705H1110039-02
• Dg or B/Br wire open
or shorted to ground,
or poor (24) or (4)
connection. Refer to
"Terminal Alignment
of ECM Coupler
(Harness Side)
(Page1A-5)".
• 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
again.
I705H1110040-02
Resistance
Yes
• Loose or poor
contacts on the ECM
coupler (terminal (24)
or (4)). Refer to
"Terminal Alignment
of ECM Coupler
(Harness Side)
(Page1A-5)".
• Open or short circuit
in the Dg wire or B/Br
wire.
Replace the ECT
sensor with a new one.
No