FUEL SYSTEM <4D5-Step
III
> - On-vehicle Service
FUEL SYSTEM <4D5-Step
III
> - On-vehicle Service
13-61
ENGINE COOLANT TEMPERATURE SENSOR
CHECK
1. Remove the engine coolant temperature sensor.
2. Measure the resistance between the terminals of the
connectors while immersing the sensor part of the engine
coolant temperature sensor in the hot water.
Standard value:
2.1 - 2.7 k
Ω
(at 20
_
C)
0.26 - 0.36 k
Ω
(at 80
_
C)
3. If the resistance is not within the range of the standard
value, replace the engine coolant temperature sensor.
4. Apply the sealant to the thread of the engine coolant
temperature sensor and tighten it to the specified torque.
Sealant:
3M Nut Locking Part No. 4171 or equivalent
Tightening torque: 36
±
6 N·m
EGR VALVE POSITION SENSOR CHECK
1. Disconnect the EGR valve position sensor connector.
2. Measure the resistance between the EGR valve position
sensor side connector terminal No. 2 and terminal No.
3.
Standard value: 3.5 - 6.5 k
Ω
3. Install a hand vacuum pump to the EGR valve nipple.
4. Measure the resistance between the EGR valve position
sensor-side connector terminal No. 1 and terminal No.
3 when a negative pressure is applied.
Normal condition:
Slowly increase the negative
pressure to 60 kPa.
Changes smoothly in
proportion to the negative
pressure
5. If the resistance is outside the standard value, or if it
doesn’t change smoothly, replace the EGR valve position
sensor.
Engine coolant
temperature sensor
Equipment
side connector
EGR valve
position
sensor
