Page 538 - 2019 SHOP MANUAL CRF1000/A/D

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LIGHTS/METERS/SWITCHES
INSPECTION
Remove the open air temperature sensor 2P (Black)
connector (page 22-17).
Measure the resistance at the 2P connector [1] of the
sensor side.
Standard: 4.9 – 5.1 kΩ (25°C/77°F) [1]

Replace the open air temperature sensor if it is out of
specification.

HIGH COOLANT TEMPERATURE
INDICATOR/ECT SENSOR

SYSTEM INSPECTION
If the high coolant temperature indicator does not
operate properly, check the following:
– Combination meter initial operation (page 22-12)
– TXD line (page 22-14)
– MIL blinking: If the MIL blinks 7 (DTC 7-1, 7-2),
check the ECT sensor system (page 4-14).
– ECT sensor (page 22-18)
If the above items are OK, replace the combination
meter (page 22-12).

ECT SENSOR UNIT INSPECTION
Remove the ECT sensor (page 4-41).
Suspend the ECT sensor [1] in a pan of coolant on an
electric heating element and measure the resistance
through the sensor as the coolant heats up.
• Soak the ECT sensor in coolant up to its threads
with at least 40 mm (1.6 in) from the bottom of the
pan to the bottom of the sensor.
• Keep the temperature constant for 3 minutes before
testing. A sudden change of temperature will result
in incorrect readings. Do not let the thermometer or
ECT sensor touch the pan.
Measure the resistance between the ECT sensor
terminals. [1]
Temperature 40°C (104°F) 100°C (212°F)
Resistance 1.0 – 1.3 kΩ 0.14 – 0.18 kΩ
Replace the ECT sensor if it is out of specification.

22-18