Infiniti M35/M45 Y50. Manual - part 41

TROUBLE DIAGNOSIS

AT-87

D

E

F

G

H

I

J

K

L

M

A

B

AT

64

Others

Extremely large 
creep.

ON vehicle

1. Engine idle speed 

EC-83

 (for 

VQ35DE 

engine), 

EC-785

  

(for 

VK45DE 

engine)

2. CAN communication line

AT-105

3. ATF pressure switch 5

AT-176

OFF vehicle

4. Torque converter

AT-301

65

With selector lever in 
“P” position, vehicle 
does not enter parking 
condition or, with 
selector lever in 
another position, park-
ing condition is not 
cancelled.
Refer to 

AT-191, "In 

“P” Position, Vehicle 
Moves When Pushed"

 

.

ON vehicle

1. PNP switch

AT-113

2. A/T position

AT-227

OFF vehicle

3. Parking components

AT-250

 

(2WD 

models) or 

AT-301

  

(AWD 

models)

66

Vehicle runs with A/T 
in “P” position.

ON vehicle

1. PNP switch

AT-113

2. A/T fluid level and state

AT-53

3. A/T position

AT-227

4. Control valve with TCM

AT-236

OFF vehicle

5. Parking components

AT-250

 

(2WD 

models) or 

AT-301

  

(AWD 

models)

6. Gear system

AT-281

67

Vehicle runs with A/T 
in “N” position.
Refer to 

AT-192, "In 

“N” Position, Vehicle 
Moves"

 .

ON vehicle

1. PNP switch

AT-113

2. A/T fluid level and state

AT-53

3. A/T position

AT-227

4. Control valve with TCM

AT-236

OFF vehicle

5. Input clutch

AT-327

6. Gear system

AT-281

7. Direct clutch

AT-341

8. Reverse brake

AT-301

9. Forward one-way clutch (Parts behind drum support is 
impossible to perform inspection by disassembly. Refer to 

AT-17, "Cross-Sectional View (VQ35DE Models for 2WD)"

 , 

AT-18, "Cross-Sectional View (VK45DE Models for 2WD)"

  or 

AT-19, "Cross-Sectional View (AWD Models)"

 .)

AT-301

10. Forward brake (Parts behind drum support is impossible 
to perform inspection by disassembly. Refer to 

AT-17, 

"Cross-Sectional View (VQ35DE Models for 2WD)"

 , 

AT-18, 

"Cross-Sectional View (VK45DE Models for 2WD)"

  or 

AT-19, 

"Cross-Sectional View (AWD Models)"

 .)

AT-301

No.

Item

Symptom

Condition

Diagnostic Item

Reference 

page

AT-88

TROUBLE DIAGNOSIS

68

Others

Engine does not start 
in “N” or “P” position.
Refer to 

AT-190, 

"Engine Cannot Be 
Started in “P” or “N” 
Position"

 .

ON vehicle

1. Push-button ignition switch and starter

PG-3

, 

SC-

8

2. A/T position

AT-227

3. PNP switch

AT-113

69

Engine starts in posi-
tions other than “N” or 
“P”.

ON vehicle

1. Push-button ignition switch and starter

PG-3

, 

SC-

8

2. A/T position

AT-227

3. PNP switch

AT-113

70

Engine stall.

ON vehicle

1. A/T fluid level and state

AT-53

2. Engine speed signal

AT-124

3. Turbine revolution sensor

AT-117

4. Torque converter clutch solenoid valve

AT-126

5. CAN communication line

AT-105

6. Control valve with TCM

AT-236

OFF vehicle

7. Torque converter

AT-301

71

Engine stalls when 
selector lever shifted 
“N” 

→

 “D”or “R”.

ON vehicle

1. A/T fluid level and state

AT-53

2. Engine speed signal

AT-124

3. Turbine revolution sensor

AT-117

4. Torque converter clutch solenoid valve

AT-126

5. CAN communication line

AT-105

6. Control valve with TCM

AT-236

OFF vehicle

7. Torque converter

AT-301

72

Engine speed does 
not return to idle.
Refer to 

AT-212, 

"Engine Speed Does 
Not Return to Idle"

 .

ON vehicle

1. A/T fluid level and state

AT-53

2. ATF pressure switch 5 and direct clutch solenoid valve

AT-176

, 

AT-155

  

3. ATF pressure switch 1 and front brake solenoid valve

AT-172

, 

AT-151

4. Accelerator pedal position sensor

AT-132

5. Vehicle speed sensor·A/T and vehicle speed sensor·MTR

AT-119

, 

AT-140

6. CAN communication line

AT-105

7. Control valve with TCM

AT-236

OFF vehicle

8. Front brake (brake band)

AT-301

9. Direct clutch

AT-341

No.

Item

Symptom

Condition

Diagnostic Item

Reference 

page

TROUBLE DIAGNOSIS

AT-89

D

E

F

G

H

I

J

K

L

M

A

B

AT

TCM Input/Output Signal Reference Values

NCS001KG

A/T ASSEMBLY HARNESS CONNECTOR TERMINAL LAYOUT 

TCM INSPECTION TABLE

Data are reference value and are measured between each terminal and ground.

SCIA1658E

Terminal

Wire 

color

Item

Condition

Data (Approx.)

1

R/W

Power supply
(Memory back-up)

Always

Battery voltage

2

R/W

Power supply
(Memory back-up)

Always

Battery voltage

3

L

CAN-H

–

–

4

V

K-line (CONSULT-
II signal)

The terminal is connected to the data link connector for CONSULT-II.

–

5

B

Ground

Always

0 V

6

Y/R

Power supply

–

Battery voltage

–

0  V

7

R/L

Back-up lamp 
relay

Selector lever in “R” position.

0 V

Selector lever in other positions.

Battery voltage

8

P

CAN-L

–

–

9

GR/R

Starter  relay

Selector lever in “N”, “P” positions.

Battery voltage

Selector lever in “R”, “D” positions.

0 V

10

B

Ground

Always

0 V

AT-90

TROUBLE DIAGNOSIS

CONSULT-II Function (A/T)

NCS001KH

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.

FUNCTION

CONSULT-II REFERENCE VALUE

NOTICE:
1.

The CONSULT-II electrically displays shift timing and lock-up timing (that is, operation timing of each sole-
noid).
Check for time difference between actual shift timing and the CONSULT-II display. If the difference is
noticeable, mechanical parts (except solenoids, sensors, etc.) may be malfunctioning. Check mechanical
parts using applicable diagnostic procedures.

2.

Shift schedule (which implies gear position) displayed on CONSULT-II and that indicated in Service Man-
ual may differ slightly. This occurs because of the following reasons:

–

Actual shift schedule has more or less tolerance or allowance,

–

Shift schedule indicated in Service Manual refers to the point where shifts start, and

–

Gear position displayed on CONSULT-II indicates the point where shifts are completed.

3.

Display of solenoid valves on CONSULT-II changes at the start of shifting, while gear position is displayed
upon completion of shifting (which is computed by TCM).

Diagnostic test mode

Function

Reference page

Self-diagnostic results

Self-diagnostic results can be read and erased quickly.

AT-92

Data monitor

Input/Output data in the ECU can be read.

AT-96

CAN diagnostic support 
monitor

The results of transmit/receive diagnosis of CAN communication can be read.

AT-100

Function test

Performed by CONSULT-II instead of a technician to determine whether each system 
is “OK” or “NG”.

—

DTC work support

Select the operating condition to confirm Diagnostic Trouble Codes.

AT-100

ECU part number

ECU part number can be read.

—

Item name

Condition 

Display value 

(Approx.)

VHCL/S SE-A/T

During driving

Approximately 
matches the speed 
meter reading.

VHCL/S SE-MTR

ACCELE POSI

Released accelerator pedal.

0.0/8

Fully depressed accelerator pedal.

8.0/8

CLSD THL POS

Released accelerator pedal.

ON

Fully depressed accelerator pedal.

OFF

W/O THL POS

Fully depressed accelerator pedal.

ON

Released accelerator pedal.

OFF

BRAKE SW

Depressed brake pedal.

ON

Released brake pedal.

OFF

ENGINE SPEED

Engine running

Closely matches the 
tachometer reading.

TURBINE REV

During driving (lock-up ON)

Approximately 
matches the engine 
speed.

ATF TEMP SE 1

0

°

C (32

°

 F) - 20

°

C (68

°

F) - 80

°

C (176

°

F)

3.3 - 2.7 - 0.9 V

ATF TEMP SE 2

3.3 - 2.5 - 0.7 V

TCC SOLENOID

Lock-up is active

0.4 - 0.6 A

LINE PRES SOL

During driving

0.2 - 0.6 A