Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 1840

7A1-22 CONSTRUCTION AND FUNCTION

TURBINE SENSOR

•

The turbine sensor is a hall element. It is installed to the front of the transmission case. The turbine

sensor converts the rotations of the reverse & high clutch drum fitted with the input shaft by spline to
pulse signal and sends the signal to TCM.

•

One turn of the reverse & high clutch drum generates 32-pulse signal, which is sent to the TCM.

Figure 38. Turbine Sensor

SPEED SENSOR

•

The speed sensor is a hall element. It is installed to the rear of the transmission case. The speed sensor

converts the rotations of the parking gear fitted with the output shaft by spline to a pulse signal which is
sent to the TCM.

•

One turn of the parking gear generates a 16-pulse signal to be sent to the TCM.

Figure 39. Speed Sensor

Figure 40. Location of Turbine & Speed Sensor

CONSTRUCTION AND FUNCTION 7A1-23

THROTTLE POSITION SENSOR (TPS)

•

Opening of the accelerator pedal is converted to an electric signal which is transmitted from ECM to TCM.

Figure 41. Throttle Position Sensor

Figure 42. Pin Assignment

ENGINE SPEED SENSOR (=TDC SENSOR)

•

The engine speed sensor converts the crankshaft from the TDC (Top Dead Center) sensor rotation to a

pulse signal which is transmitted from ECM to TCM.

Ground

Signal

Shield Line

Figure 43. TDC Sensor

Figure 44. Pin Assignment

7A1-24 CONSTRUCTION AND FUNCTION

BRAKE SWITCH

•

The brake switch is installed to the brake pedal. When the driver steps on the brake pedal, an electric

signal is sent to the TCM.

Brake Switch

Accelerator Pedal

Brake Pedal

TCM A3

+12V

Figure 45. Brake Switch

Figure 46. Pin Assignment

MODE SELECT SWITCH

•

The mode select switch is installed beside the select lever. When the driver selects the PWR or 3rd, an

electric signal is sent to the respectively. It turns ON the indicator lamp in the meter.

•

The 3rd START mode can be used only in the D range.

Mode Select Switch

Gear Select Lever

Power 3rd

Illumination

Lamp

1 (Illumination)

2 (Ground)

3 (TCM A24)

4 (No Connection)

5 (TCM A11)

6 (Ground)

2

1

6

5

4

3

Figure 47. Mode Select Switch

Figure 48. Pin Assignment

CONSTRUCTION AND FUNCTION 7A1-25

TRANSMISSION CONTROL MODULE (TCM)

•

The TCM is fitted side of brake pedal by means of two stud bolts.

•

The TCM judges necessary line pressure, gear shifting point and lock-up operation based on electrical

signals from switches and sensors and sends appropriate signals to solenoids.

Connect to White Connector Connect to Grey Connector

Figure 49. Pin Assignment

Pin No.

Pin Assignment

Pin No.

Pin Assignment

B1

2-4 Brake Oil Pressure Switch

A1

V BATT (Battery Back-up Power Supply)

B2

2 Range Switch

A2

P Range Switch

B3

Turbine Sensor

A3

Brake Switch

B4

ATF Thermo Sensor

A4

3rd Start Indicator Lamp

B5

Ground

A5

K-Line Signal (Tech 2 Serial Communication)

B6

Low & Reverse Brake Duty Solenoid

A6

No Connection

B7

2-4 Brake Duty Solenoid

A7

Engine Speed Sensor

B8

High Clutch Duty Solenoid

A8

No Connection

B9

Low Clutch Duty Solenoid

A9

No Connection

B10

N Range Switch

A10

Vehicle Speed Sensor Out (2WD Only)

B11

D Range Switch

A11

3rd START Select Switch

B12

Low & Reverse Brake Oil Pressure Switch

A12

4L Mode Switch (4WD Only)

B13

Vehicle Speed Sensor

A13

No Connection

B14

ATF Thermo Sensor Ground

A14

No Connection

B15

Ground

A15

No Connection

B16

No Connection

A16

Throttle Position Sensor

B17

Lock-up Duty Solenoid

A17

3 Range Switch

B18

Vign

Ignition Power Supply)

A18

DIAG Switch (Test Switch)

B19

R Range Switch

A19

A/T OIL TEMP Indicator Lamp

B20

High Clutch Oil Pressure Switch

A20

CHECK TRANS Indicator Lamp

B21

L Range Switch

A21

POWER DRIVE Indicator Lamp

B22

Ground (Shift Solenoid)

A22

No Connection

B23

Line Pressure Solenoid

A23

No Connection

B24

Vign (Ignition Power Supply)

A24

POWER DRIVE Select Switch