Isuzu KB P190. Manual — part 1064

CONSTRUCTION AND FUNCTION 7A1-17

ATF Thermo Sensor

• The ATF thermo sensor detects the ATF temperature in the oil pan and sends a signal to the TCM.
• The ATF thermo sensor is of the thermister type and the resistance value changes according to the ATF

oil temperature.

• When the ATF temperature is cold, the sensor resistance is high. When the ATF temperature increases,

the sensor resistance decreases.

• When the ATF temperature increases to 135°C (275°F), the TCM lights up the ATF temperature warning

lamp in the meter. When the ATF temperature decreases below 125

°C (257°F), the ATF temperature

warning lamp switches off.

• The ATF thermo sensor is installed to the lower control valve body and integrated with the harness

assembly.

10.0

100.0

1,000.0

10,000.0

100,000.0

-30

-20

-10

0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

ATF Temperature (°C)

R

esistance (

Ω

)

Figure 29. Characteristic of Thermo Sensor

Figure 30. Location of Thermo Sensor

ATF Temperature

(deg. C)

Resistance (Ohm)

(Approximately)

ATF Temperature

(deg. C)

Resistance (Ohm)

(Approximately)

-30 29,614

100

190

-20

16,705

110

149

-10 9,842

120

118

0

6,028

128

98

20

2,500

130

94

40

1,160

135

84

50

819

140

76

60 591

145

68

80 324

150

62

7A1-18 CONSTRUCTION AND FUNCTION

Terminal Assembly

Pin No.

Connected to

Connected TCMPin No.

6

Line Pressure Solenoid

B23

12

Low & Reverse Brake Oil Pressure Switch

B12

5

Low & Reverse Brake Duty Solenoid

B6

11 Ground

Return

B22

4

Lock-up Duty Solenoid

B17

10

High Clutch Duty Solenoid

B8

3

Low Clutch Duty Solenoid

B9

9

2-4 Brake Duty Solenoid

B7

2 Oil

Thermo

Sensor

B4

8

Oil Thermo Sensor Ground

B14

1

High Clutch Oil Pressure Switch

B20

7

2-4 Brake Oil Pressure Switch

B1

1

2

3

4

5

6

8

9

10

11

12

7

Terminal Assembly

Inhibitor Switch

Figure 31. Pin Assignment

Figure 32. Location of Terminal Assembly

CONSTRUCTION AND FUNCTION 7A1-19

OIL PASSAGE

Figure 33. Oil Passage of Transmission Case

7A1-20 CONSTRUCTION AND FUNCTION

Figure 34. Oil Passage of Oil Pump

PARKING FUNCTION

• By setting the select lever to the P position, the parking pawl is engaged with the parking gear and fixes

the output shaft.

• By moving the select lever, the manual shaft on the right side of the AT is moved. The manual plate and

parking rod in the AT are interlocked with the manual shaft. When the manual shaft moves, the parking
rod end pushes up the parking pawl.

• The parking pawl is engaged with the parking gear when pushed up, and fixes the output shaft.
• When the clutch is disengaged, it returns to the original position via the force of the return spring, fixed to

the parking pawl.

Figure 35. Parking Function