Suzuki VZ800 Service Manual page 202

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:
 09900-25008: Multi-circuit tester set
 Tester knob indication: Resistance (Ω)
Refer to next page for details.
Is the resistance OK?
• 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.
YES
• 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.
6) After repairing the trouble, clear the DTC using SDS tool.
(5-25)
 ECT sensor specification
Engine Coolant Temp.
20 °C (68 °F)
40 °C (104 °F)
60 °C (140 °F)
80 °C (176 °F)
Approx. 2.3 – 2.6 kΩ at 20 °C (68 °F)
(Terminal – Terminal)
Resistance
Approx. 2.45 kΩ
Approx. 1.148 kΩ
Approx. 0.587 kΩ
Approx. 0.322 kΩ
2 2
2
2
ECM coupler (Harness side)
FI SYSTEM 5-45