TGB BLADE 600 Service Manual page 89

6) Connect the ECT sensor coupler.
7) Turn the ignition switch ON.
8) Measure the voltage between Y/R wire and
ground.
Output voltage: 0.1 – 4.6 V
(+ Y/R – - Ground)
Are the continuity and voltage OK?
YES Go to step 2
NO Y/R wire shorted to ground.
9) After repairing the trouble, clear the DTC
using Diagnosis tool.
Step 2
1) Turn the ignition switch OFF.
2) Disconnect the ECT sensor coupler.
3) Measure the ECT sensor resistance.
ECT sensor resistance:
Approx. 2.3 – 2.6 kΩ at 20 °C (68 °F)
(Terminal – Terminal)
Is the resistance OK?
• Y/R or Gr/R wire open or shorted to
ground, or poor 42 or 27 connection
• If wire and connection are OK,
intermittent trouble or faulty ECU.
• Recheck each terminal and wire
YES
harness for open circuit and poor
connection.
• Replace the ECU with a known
good one, and inspect it again.
NO Replace ECT sensor with a new one.
4) After repairing the trouble, clear the DTC
using Diagnosis tool.
ECT sensor specification
Engine Coolant
Temperature
20 °C (68 °F)
40 °C (104 °F) Approx. 1.148 kΩ
60 °C (140 °F) Approx. 0.587 kΩ
80 °C (176 °F) Approx. 0.322 kΩ
Resistance
Approx. 2.45 kΩ
4-1. FUEL INJECTION SYSTEM
42
27
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