Nissan Titan. Instruction — part 587

A/T CONTROL SYSTEM

TM-31

< SYSTEM DESCRIPTION >

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FUNCTION OF PRESSURE SWITCH

Front brake control valve

When the front brake is coupled, adjusts the line pressure to the optimum pressure (front
brake pressure) and supplies it to the front brake. (In 1GR, 2GR, 3GR, and 5GR, adjusts
the clutch pressure.)

Accumulator control valve

Adjusts the pressure (accumulator control pressure) acting on the accumulator piston
and low coast reducing valve to the pressure appropriate to the driving state.

Pilot valve A

Adjusts the line pressure and produces the constant pressure (pilot pressure) required
for line pressure control, shift change control, and lock-up control.

Pilot valve B

Adjusts the line pressure and produces the constant pressure (pilot pressure) required
for shift change control.

Low coast brake switching valve

During engine braking, supplies the line pressure to the low coast brake reducing valve.

Low coast brake reducing valve

When the low coast brake is coupled, adjusts the line pressure to the optimum pressure
(low coast brake pressure) and supplies it to the low coast brake.

N-R accumulator

Produces the stabilizing pressure for when N-R is selected.

Direct clutch piston switching valve

Operates in 4GR and switches the direct clutch coupling capacity.

High and low reverse clutch control valve

When the high and low reverse clutch is coupled, adjusts the line pressure to the opti-
mum pressure (high and low reverse clutch pressure) and supplies it to the high and low
reverse clutch. (In 1GR, 3GR, 4GR and 5GR, adjusts the clutch pressure.)

Input clutch control valve

When the input clutch is coupled, adjusts the line pressure to the optimum pressure (in-
put clutch pressure) and supplies it to the input clutch. (In 4GR and 5GR, adjusts the
clutch pressure.)

Direct clutch control valve

When the direct clutch is coupled, adjusts the line pressure to the optimum pressure (di-
rect clutch pressure) and supplies it to the direct clutch. (In 2GR, 3GR, and 4GR, adjusts
the clutch pressure.)

TCC control valve
TCC control plug
TCC control sleeve

Switches the lock-up to operating or released. Also, by performing the lock-up operation
transiently, lock-up smoothly.

Torque converter lubrication valve

Operates during lock-up to switch the torque converter, cooling, and lubrication system
oil path.

Cool bypass valve

Allows excess oil to bypass cooler circuit without being fed into it.

Line pressure relief valve

Discharges excess oil from line pressure circuit.

N-D accumulator

Produces the stabilizing pressure for when N-D is selected.

Instruction valve

Sends line pressure to each circuit according to the select position. The circuits to which
the line pressure is not sent drain.

Name

Function

Name

Function

Pressure switch 2 (LC/B)

Detects any malfunction in the low coast brake hydraulic pressure. When it detects any
malfunction, it puts the system into fail-safe mode.

TM-32

< SYSTEM DESCRIPTION >

A/T CONTROL SYSTEM

Component Parts Location

INFOID:0000000009885692

1.

AT CHECK indicator lamp

2.

A/T position indicator

3.

A/T oil temp gauge (with trailer tow)

4.

Instruction mode switch (column shift)

5.

A/T shift selector (column shift)

6.

Accelerator pedal position sensor

7.

Accelerator pedal

8.

Control valve with TCM*1

9.

A/T assembly harness connector

10. 1st position switch

4th position switch

11. Tow mode switch

AWDIA0964ZZ

A/T CONTROL SYSTEM

TM-33

< SYSTEM DESCRIPTION >

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*1: The following components are included in the control valve with TCM.
• TCM (transmission control module)
• Input speed sensor 1
• Input speed sensor 2
• Output speed sensor
• A/T fluid temperature sensor
• Transmission range switch
• Line pressure solenoid valve
• Torque converter clutch solenoid valve
• Direct clutch solenoid valve
• High and low reverse clutch solenoid valve
• Input clutch solenoid valve
• Front brake solenoid valve
• Low coast brake solenoid valve

TM-34

< SYSTEM DESCRIPTION >

A/T SHIFT LOCK SYSTEM

A/T SHIFT LOCK SYSTEM

System Description

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FLOOR SHIFT MODELS

• The selector lever cannot be shifted from “P” (Park) unless the brake pedal is applied and the ignition switch

is turned to the “ON” position.

• The ignition switch cannot be returned to the “OFF” position and the key removed unless the selector lever is

placed in “P” (Park).

• The shift lock mechanism is controlled by the ON-OFF operation of the shift lock solenoid.

• The key switch and key lock solenoid lock mechanism are controlled by the ON-OFF operation of the key

lock solenoid and the operation of the rotator and slider located inside the key cylinder.

COLUMN SHIFT MODELS

• The selector lever cannot be shifted from “P” (Park) unless the brake pedal is applied and the ignition switch

is turned to the “ON” position.

• The ignition switch cannot be returned to the “OFF” position and the key removed unless the selector lever is

placed in “P” (Park).

• The shift lock mechanism is controlled by the ON-OFF operation of the shift lock solenoid.

Component Parts Location

INFOID:0000000009885694

FLOOR SHIFT MODELS

COLUMN SHIFT MODELS

1.

Emergency lever

2.

Key lock solenoid

3.

Key switch

4.

Shift lock control unit (view with glove
box removed)

5.

Shift lock solenoid

6.

Park position switch

7.

Shift lock release

8.

Stop lamp switch

AWDIA0780ZZ