Infiniti M45 (Y34). Manual — part 41

TROUBLE DIAGNOSIS

AT-49

D

E

F

G

H

I

J

K

L

M

A

B

AT

4

4-3

Part 2

AT-60

❏

Vehicle Cannot Be Started From D1.

AT-271

.

❏

A/T Does Not Shift: D1

→

D2.

AT-274

.

❏

A/T Does Not Shift: D2

→

D3.

AT-277

.

❏

A/T Does Not Shift: D3

→

D4.

AT-280

.

Part 3

AT-60

❏

Cannot Be Changed To Manual Mode.

AT-293

.

❏

A/T Does Not Shift: 5th gear

→

4th gear.

AT-294

.

❏

A/T Does Not Shift: 4th gear

→

3rd gear.

AT-296

.

❏

A/T Does Not Shift: 3rd gear

→

2nd gear.

AT-298

.

❏

A/T Does Not Shift: 2nd gear

→

1st gear.

AT-300

.

❏

Vehicle Does Not Decelerate By Engine Brake.

AT-302

.

❏

Perform self-diagnostics. Enter checks for detected items.

❏

Vehicle speed sensor·A/T.

AT-116

.

❏

Vehicle speed sensor·MTR.

AT-165

.

❏

Direct clutch solenoid valve.

AT-199

.

❏

TCC solenoid valve.

AT-123

.

❏

Line pressure solenoid valve.

AT-134

.

❏

Input clutch solenoid valve.

AT-179

.

❏

Front brake solenoid valve.

AT-189

.

❏

Low coast brake solenoid valve.

AT-220

.

❏

High and low reverse clutch solenoid valve.

AT-209

.

❏

PNP switch.

AT-110

.

❏

A/T fluid temperature sensors 1, 2.

AT-154

.

❏

Turbine revolution sensors 1, 2.

AT-160

.

❏

A/T interlock.

AT-167

.

❏

A/T 1st engine braking.

AT-174

.

❏

Start signal.

AT-106

.

❏

Accelerator pedal position signal.

AT-152

.

❏

Engine sped signal.

AT-121

.

❏

CAN communication.

AT-103

.

❏

TCM power supply.

AT-140

.

❏

Battery

❏

Other

5

❏

Inspect each system for items found to be NG in the self-diagnostics and repair or replace the malfunction

parts.

6

❏

Perform all road tests and enter the checks again for the required items.

AT-55

7

❏

For any remaining NG items, execute the “diagnostics procedure” and repair or replace the malfunction parts.

See the chart for diagnostics by symptoms. (This chart also contains other symptoms and inspection proce-
dures.)

AT-63

8

❏

Erase the results of the self-diagnostics from the TCM.

AT-89

,

AT-

101

AT-50

TROUBLE DIAGNOSIS

A/T Electrical Parts Location

ACS004HO

SCIA1486E

TROUBLE DIAGNOSIS

AT-51

D

E

F

G

H

I

J

K

L

M

A

B

AT

Circuit Diagram

ACS004HP

TCWA0108E

AT-52

TROUBLE DIAGNOSIS

Inspections Before Trouble Diagnosis

ACS004HQ

A/T FLUID CHECK
Fluid Leakage and Fluid Level Check

●

Inspect for fluid leakage and check the fluid level. Refer to

AT-14, "Checking A/T Fluid"

.

Fluid Condition Check

Inspect the fluid condition.

STALL TEST
Stall Test Procedure

1.

Inspect the amount of engine oil. Replenish the engine oil if necessary.

2.

Drive for about 10 minutes to warm up the vehicle so that the A/
T fluid temperature is 50 to 80

°

C (122 to 176

°

F). Inspect the

amount of A/T fluid. Replenish if necessary.

3.

Securely engage the parking brake so that the tires do not turn.

4.

Engine start, apply foot brake, and place selector lever in “D”
position.

5.

While holding down the foot brake, gradually press down the
accelerator pedal.

6.

Quickly read off the stall speed, then quickly remove your foot
from the accelerator pedal.

CAUTION:

Do not hold down the accelerator pedal for more than 5 sec-
onds during this test.

7.

Move the selector lever to “N” position.

8.

Cool down the A/T fluid.

Fluid status

Conceivable Cause

Required Operation

Varnished (viscous
varnish state)

Clutch, brake
scorched

Replace the A/T fluid and check the
A/T main unit and the vehicle for
malfunctions (wire harnesses,
cooler pipes, etc.)

Milky white or
cloudy

Water in the fluid

Replace the A/T fluid and check for
places where water is getting in.

Large amount of
metal powder mixed
in

Unusual wear of
sliding parts within
A/T

Replace the A/T fluid and check for
improper operation of the A/T.

SAT638A

SAT647B

SCIA1224E

SAT514G