COMMON RAIL SYSTEM
07-CR-E5,07-CR-TE5,07-CR-TIE5, DM
1-S170
2. Measure the Resistance Between Terminals
1. Place the key switch in the OFF position, unplug the engine
ECU wiring harness connector from the socket, and measure
the resistance between terminals E66 and E76 of the connector.
9Y3200007CRS0219US0
3. Check the Coolant Temperature Sensor
1. Turn the key switch OFF, remove the connector from the sensor
side and measure the resistance between the terminals on the
sensor side.
9Y3200007CRS0220US0
4. Measure the Engine ECU Terminal Voltage
1. Plug the engine ECU wiring harness connector into socket
again, unplug the sensor connector, and measure the voltage
between engine ECU terminals E66 and E76 at the engine ECU
side.
9Y3200007CRS0221US0
Service specification
Temperature Resistance
20 °C (68 °F) Approx. 2.5 kΩ
40 °C (104 °F) Approx. 1.2 kΩ
60 °C (140 °F) Approx. 0.58 kΩ
80 °C (176 °F) Approx. 0.32 kΩ
100 °C (212 °F) Approx. 0.18 kΩ
OK Go to "4. Measure the Engine ECU Terminal Voltage".
NG Go to "3. Check the sensor".
Service specification
Temperature Resistance
20 °C (68 °F) Approx. 2.5 kΩ
40 °C (104 °F) Approx. 1.2 kΩ
60 °C (140 °F) Approx. 0.58 kΩ
80 °C (176 °F) Approx. 0.32 kΩ
100 °C (212 °F) Approx. 0.18 kΩ
OK Wiring harness open circuit or connector fault → Check and replace.
NG Coolant temperature sensor fault → Replace the coolant temperature
sensor.
(1) Coolant Temperature Sensor
Service
specification
Approx. 5 V
OK The engine ECU connector is faulty or its wiring harness is shorted.
NG Confirm by using other sensors that there is no ground short malfunction
before replacing the engine ECU.
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