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DIFFERENTIAL OIL TEMPERATURE SENSOR INSPECTION

DIFFERENTIAL OIL TEMPERATURE SENSOR INSPECTION

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Warning
•  Hot differential oil may cause severe burns. Do not perform maintenance while differential oil is hot.

1.  Disconnect the negative battery terminal.(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

2.  Remove the differential oil temperature sensor. (See DIFFERENTIAL OIL TEMPERATURE SENSOR REMOVAL/INSTALLATION.)

3.  Wrap the differential oil temperature sensor with plastic wrap and immerse it into a beaker filled with water. Gradually raise the water temperature, and measure resistance between differential oil temperature sensor terminals A and B.

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•  If not as specified, replace the differential oil temperature sensor. (See DIFFERENTIAL OIL TEMPERATURE SENSOR REMOVAL/INSTALLATION.)
Note
•  The resistance of types A and B differs depending on the differential oil temperature sensor specification.
•  The type of the differential oil temperature sensor is determined based on the character on the label shown in the figure and the connector color on the part side of the differential oil temperature sensor.
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Type A
―  Character on label: P
―  Connector color: Gray
Type B
―  Character on label: R
―  Connector color: Black

Differential oil temperature sensor specification (Type A)

Water temperature (°C {°F})

Resistance (kilohm)
0 {32}
91—100
10 {50}
56—61
20 {68}
35—39
30 {86}
23—25
40 {104}
15—16
50 {122}
10—11
60 {140}
7.1—7.9
70 {158}
5.0—5.6
80 {176}
3.6—4.0

Differential oil temperature sensor specification (Type B)

Water temperature (°C {°F})

Resistance (kilohm)
0 {32}
approx. 9.85
10 {50}
approx. 6.34
20 {68}
approx. 4.18
30 {86}
approx. 2.83
40 {104}
approx. 1.96
50 {122}
approx. 1.38
60 {140}
approx. 0.992
70 {158}
approx. 0.726
80 {176}
approx. 0.541

4.  Install the differential oil temperature sensor.

5.  Connect the negative battery terminal.(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)