Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 1731

CONSTRUCTION AND FUNCTION 7A1-21

INHIBITOR SWITCH

•

The inhibitor switch is installed on the right side of the transmission main unit to detect the select lever

position.

•

The inhibitor switch is connected with the starter SW circuit. The engine cannot be started when the

select lever is at any position other than the P or N range.

•

By moving the select lever, the combination of the inhibitor switch pins is changed. The current range of

TCM is detected based on the combination of the pins.

10 7 3 2 4 8 5 1 9 6

P

R

N

D

3

2

L

6

3

4

5

10

9

8

7

2

1

Terminal Assembly

Inhibitor Switch

Figure 36. Pin Assignment

Figure 37. Location of Inhibitor Switch

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