Infiniti M35/M45 Y50. Manual - part 42

TROUBLE DIAGNOSIS

AT-91

D

E

F

G

H

I

J

K

L

M

A

B

AT

FR/B SOLENOID

Front brake engaged. Refer to 

AT-21

 .

0.6 - 0.8 A

Front brake disengaged. Refer to 

AT-21

 .

0 - 0.05 A

I/C SOLENOID

Input clutch disengaged. Refer to 

AT-21

 .

0.6 - 0.8 A

Input clutch engaged. Refer to 

AT-21

 .

0 - 0.05 A

D/C SOLENOID

Direct clutch disengaged. Refer to 

AT-21

 .

0.6 - 0.8 A

Direct clutch engaged. Refer to 

AT-21

 .

0 - 0.05 A

HLR/C SOL

High and low reverse clutch disengaged. Refer to 

AT-21

 .

0.6 - 0.8 A

High and low reverse clutch engaged. Refer to 

AT-21

 .

0 - 0.05 A

STARTER RELAY

Selector lever in “N”, “P” positions.

ON

Selector lever in “R”, “D” positions.

OFF

SLCT LVR POSI

Selector lever in “N”, “P” positions.

N/P

Selector lever in “R” position.

R

Selector lever in “D” position.

D

ON OFF SOL

Low coast brake engaged. Refer to 

AT-21

 

.

ON

Low coast brake disengaged. Refer to 

AT-21

 

.

OFF

ATF PRES SW 1

Front brake engaged. Refer to 

AT-21

 

.

ON

Front brake disengaged. Refer to 

AT-21

 

.

OFF

ATF PRES SW 2

Low coast brake engaged. Refer to 

AT-21

 

.

ON

Low coast brake disengaged. Refer to 

AT-21

 

.

OFF

ATF PRES SW 3

Input clutch engaged. Refer to 

AT-21

 

.

ON

Input clutch disengaged. Refer to 

AT-21

 

.

OFF

ATF PRES SW 5

Direct clutch engaged. Refer to 

AT-21

 

.

ON

Direct clutch disengaged. Refer to 

AT-21

 

.

OFF

ATF PRES SW 6

High and low reverse clutch engaged. Refer to 

AT-21

 

.

ON

High and low reverse clutch disengaged Refer to 

AT-21

 

.

OFF

MANU MODE SW

Manual shift gate position (neutral)

ON

Other than the above

OFF

NON M-MODE SW

Manual shift gate position

OFF

Other than the above

ON

UP SW LEVER

Selector lever: + side

ON

Other than the above

OFF

DOWN SW LEVER

Selector lever: - side

ON

Other than the above

OFF

GEAR

During driving

1, 2, 3, 4, 5

Item name

Condition 

Display value 

(Approx.)

AT-92

TROUBLE DIAGNOSIS

CONSULT-II SETTING PROCEDURE

Refer to 

GI-38, "CONSULT-II Start Procedure"

 .

SELF-DIAGNOSTIC RESULT MODE

After performing self-diagnosis, place check marks for results on the 

AT-48, "DIAGNOSTIC WORKSHEET"

 .

Reference pages are provided following the items.

Operation Procedure

1.

Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE”
screen.
Display shows malfunction experienced since the last erasing
operation.

Display Items List

X: Applicable, —: Not applicable

BCIA0031E

Items (CONSULT-

II screen terms)

Malfunction is detected when...

TCM self-

diagnosis

OBD-II (DTC)

Reference 

page

 “A/T” with   

CONSULT-II

MIL indicator 

lamp*1, 

“ENGINE” with 

CONSULT-II or 

GST

CAN COMM CIR-
CUIT

●

When TCM is not transmitting or receiving CAN communi-
cation signal for 2 seconds or more.

U1000

U1000

AT-105

STARTER RELAY/
CIRC

●

If this signal is ON other than in “P” or “N” position, this is 
judged to be a malfunction.
(And if it is OFF in “P” or “N” position, this too is judged to 
be a malfunction.)

P0615

—

AT-108

TCM

●

TCM is malfunctioning

P0700

P0700

AT-112

PNP SW/CIRC

●

PNP switch 1-4 signals input with impossible pattern.

●

“P” position is detected from “N” position without any other 
position being detected in between.

P0705

P0705

AT-113

TURBINE REV S/
CIRC

●

TCM does not receive the proper voltage signal from the 
sensor.

●

TCM detects an irregularity only at position of 4th gear for 
turbine revolution sensor 2.

P0717

P0717

AT-117

VEH SPD SEN/
CIR AT

●

Signal from vehicle speed sensor A/T (revolution sensor) 
not input due to cut line or the like.

●

Unexpected signal input during running.

●

After ignition switch is turned ON, unexpected signal input 
from vehicle speed sensor MTR before the vehicle starts 
moving.

P0720

P0720

AT-119

ENGINE SPEED 
SIG

●

TCM does not receive the CAN communication signal from 
the ECM.

P0725

P0725*3

AT-124

TCC SOLENOID/
CIRC

●

Normal voltage not applied to solenoid due to cut line, 
short, or the like.

P0740

P0740

AT-126

A/T TCC S/V 
FNCTN

●

A/T cannot perform lock-up even if electrical circuit is good.

●

TCM detects as irregular by comparing difference value 
with slip rotation.

P0744

P0744*2

AT-128

TROUBLE DIAGNOSIS

AT-93

D

E

F

G

H

I

J

K

L

M

A

B

AT

L/PRESS SOL/
CIRC

●

Normal voltage not applied to solenoid due to cut line, 
short, or the like.

●

TCM detects as irregular by comparing target value with 
monitor value.

P0745

P0745

AT-130

TP SEN/CIRC A/T

●

TCM does not receive the proper accelerator pedal position 
signals (input by CAN communication) from ECM.

P1705

P1705*3

AT-132

ATF TEMP SEN/
CIRC

●

 During running, the A/T fluid temperature sensor signal 
voltage is excessively high or low.

P1710

P0710

AT-135

VEH SPD SE/
CIR·MTR

●

Signal (CAN communication) from vehicle speed sensor 
MTR not input due to cut line or the like.

●

Unexpected signal input during running.

P1721

—

AT-140

A/T INTERLOCK

●

Except during shift change, the gear position and ATF pres-
sure switch states are monitored and comparative judge-
ment made.

P1730

P1730

AT-142

A/T 1ST E/BRAK-
ING

●

Each ATF pressure switch and solenoid current is moni-
tored and if a pattern is detected having engine braking 1st 
gear other than in the M1 position, a malfunction is 
detected.

P1731

—

AT-145

I/C SOLENOID/
CIRC

●

Normal voltage not applied to solenoid due to functional 
malfunction, cut line, short, or the like.

●

TCM detects as irregular by comparing target value with 
monitor value.

P1752

P1752

AT-147

I/C SOLENOID 
FNCTN 

●

TCM detects that actual gear ratio is irregular, and relation 
between gear position and condition of ATF pressure 
switch 3 is irregular during depressing accelerator pedal. 
(Other than during shift change.)

●

TCM detects that relation between gear position and condi-
tion of ATF pressure switch 3 is irregular during releasing 
accelerator pedal. (Other than during shift change.)

P1754

P1754*2

AT-149

FR/B SOLENOID/
CIRC

●

Normal voltage not applied to solenoid due to functional 
malfunction, cut line, short, or the like.

●

TCM detects as irregular by comparing target value with 
monitor value.

P1757

P1757

AT-151

FR/B SOLENOID 
FNCT

●

TCM detects that actual gear ratio is irregular, and relation 
between gear position and condition of ATF pressure 
switch 1 is irregular during depressing accelerator pedal. 
(Other than during shift change.)

●

TCM detects that relation between gear position and condi-
tion of ATF pressure switch 1 is irregular during releasing 
accelerator pedal. (Other than during shift change.)

P1759

P1759*2

AT-153

D/C SOLENOID/
CIRC

●

Normal voltage not applied to solenoid due to cut line, 
short, or the like.

●

TCM detects as irregular by comparing target value with 
monitor value.

P1762

P1762

AT-155

Items (CONSULT-

II screen terms)

Malfunction is detected when...

TCM self-

diagnosis

OBD-II (DTC)

Reference 

page

 “A/T” with   

CONSULT-II

MIL indicator 

lamp*1, 

“ENGINE” with 

CONSULT-II or 

GST

AT-94

TROUBLE DIAGNOSIS

*1: Refer to 

EC-70, "Malfunction Indicator Lamp (MIL)"

  (for VQ35DE engine), 

EC-772, "Malfunction Indicator Lamp (MIL)"

  (for VK45DE

engine).
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.

D/C SOLENOID 
FNCTN

●

TCM detects that actual gear ratio is irregular, and relation 
between gear position and condition of ATF pressure 
switch 5 is irregular during depressing accelerator pedal. 
(Other than during shift change.)

●

TCM detects that relation between gear position and condi-
tion of ATF pressure switch 5 is irregular during releasing 
accelerator pedal. (Other than during shift change.)

P1764

P1764*2

AT-157

HLR/C SOL/CIRC

●

Normal voltage not applied to solenoid due to functional 
malfunction, cut line, short, or the like.

●

TCM detects as irregular by comparing target value with 
monitor value.

P1767

P1767

AT-159

HLR/C SOL 
FNCTN

●

TCM detects that actual gear ratio is irregular, and relation 
between gear position and condition of ATF pressure 
switch 6 is irregular during depressing accelerator pedal. 
(Other than during shift change.)

●

TCM detects that relation between gear position and condi-
tion of ATF pressure switch 6 is irregular during releasing 
accelerator pedal. (Other than during shift change.)

P1769

P1769*2

AT-161

LC/B SOLENOID/
CIRC

●

Normal voltage not applied to solenoid due to functional 
malfunction, cut line, short, or the like.

P1772

P1772

AT-163

LC/B SOLENOID 
FNCT

●

TCM detects an improper voltage drop when it tries to oper-
ate the solenoid valve.

●

Condition of ATF pressure switch 2 is different from monitor 
value, and relation between gear position and actual gear 
ratio is irregular.

P1774

P1774*2

AT-165

MANU MODE SW/
CIRC

●

When an impossible pattern of switch signals is detected, a 
malfunction is detected.

P1815

—

AT-167

ATF PRES SW 1/
CIRC

●

TCM detects that actual gear ratio is normal, and relation 
between gear position and condition of ATF pressure 
switch 1 is irregular during depressing accelerator pedal. 
(Other than during shift change.)

P1841

—

AT-172

ATF PRES SW 3/
CIRC

●

TCM detects that actual gear ratio is normal, and relation 
between gear position and condition of ATF pressure 
switch 3 is irregular during depressing accelerator pedal. 
(Other than during shift change.)

P1843

—

AT-174

ATF PRES SW 5/
CIRC

●

TCM detects that actual gear ratio is normal, and relation 
between gear position and condition of ATF pressure 
switch 5 is irregular during depressing accelerator pedal. 
(Other than during shift change.)

P1845

—

AT-176

ATF PRES SW 6/
CIRC

●

TCM detects that actual gear ratio is normal, and relation 
between gear position and condition of ATF pressure 
switch 6 is irregular during depressing accelerator pedal. 
(Other than during shift change.)

P1846

—

AT-178

NO DTC IS 
DETECTED FUR-
THER TESTING 
MAY BE 
REQUIRED

●

No NG item has been detected.

X

X

—

Items (CONSULT-

II screen terms)

Malfunction is detected when...

TCM self-

diagnosis

OBD-II (DTC)

Reference 

page

 “A/T” with   

CONSULT-II

MIL indicator 

lamp*1, 

“ENGINE” with 

CONSULT-II or 

GST