Infiniti F50. Manual - part 51

TROUBLE DIAGNOSIS

AT-89

D

E

F

G

H

I

J

K

L

M

A

B

AT

TP SEN/CIRC A/T

●

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

X

P1705

—

ATF TEMP SEN/
CIRC

●

 During running, the ATF temperature sensor signal voltage 
is excessively high or low

X

P1710

P0710

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.

X

P1716

P1716

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

—

A/T INTERLOCK

●

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

X

P1730

P1730

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.

X

P1731

—

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.

X

P1752

P1752

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)

X

P1754

P1754*2

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.

X

P1757

P1757

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)

X

P1759

P1759*2

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.

X

P1762

P1762

Items (CONSULT-

II screen terms)

Malfunction is detected when...

TCM self-diagnosis

OBD-II (DTC)

A/T CHECK    

indicator 

lamp 

 “A/T” with   

CONSULT-II

MIL indicator 

lamp*1, 

“ENGINE” with 

CONSULT-II or 

GST

AT-90

TROUBLE DIAGNOSIS

*1: Refer to 

AT-41, "Malfunction Indicator Lamp (MIL)"

 .

*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)

X

P1764

P1764*2

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.

X

P1767

P1767

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)

X

P1769

P1769*2

LC/B SOLENOID/
CIRC

●

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

X

P1772

P1772

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.

X

P1774

P1774*2

MANU MODE SW/
CIRC

●

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

—

P1815

—

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

—

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

—

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

—

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

—

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)

A/T CHECK    

indicator 

lamp 

 “A/T” with   

CONSULT-II

MIL indicator 

lamp*1, 

“ENGINE” with 

CONSULT-II or 

GST

TROUBLE DIAGNOSIS

AT-91

D

E

F

G

H

I

J

K

L

M

A

B

AT

Data monitor mode (A/T)

 X: Standard

—: Not applicable

Monitored item (Unit)

Monitor Item Selection

Remarks

ECU 

INPUT 

SIGNALS

MAIN SIG-

NALS

CAN DIAG 

SUP-

PORT 

MNTR

SELEC-

TION 

FROM 
MENU

VHCL/S SE·A/T (km/h)

X

X

—

X

Revolution sensor

VHCL/S SE·MTR (km/h)

X

—

—

X

ACCELE POSI (0.0/8) 

X

—

—

X

Accelerator pedal position signal

THROTTLE POSI (0.0/8)

X

X

—

X

Degree of opening for accelerator 
recognized by the TCM
For fail-safe operation, the specific 
value used for control is displayed.

CLSO THL POS (ON-OFF display)

X

—

—

X

Signal input with CAN communica-
tions

W/O THL POS (ON-OFF display)

X

—

—

X

Signal input with CAN communica-
tions

BRAKE SW (ON-OFF display)

X

—

—

X

Stop lamp switch

GEAR

—

X

—

X

Gear position recognized by the 
TCM updated after gear-shifting

ENGINE SPEED (rpm) 

X

X

—

X

TURBINE REV (rpm) 

X

X

—

X

OUTPUT REV (rpm) 

X

X

—

X

GEAR RATIO

—

X

—

X

TC SLIP SPEED (rpm)

—

X

—

X

Difference between engine speed 
and torque converter input shaft 
speed

F SUN GR REV (rpm) 

—

—

—

X

F CARR GR REV (rpm)

—

—

—

X

ATF TEMP SE 1 (V)

X

—

—

X

ATF TEMP SE 2 (V)

X

—

—

X

ATF TEMP 1 (

°

C)

—

X

—

X

ATF TEMP 2 (

°

C)

—

X

—

X

BATTERY VOLT (V)

X

—

—

X

ATF PRES SW 1 (ON-OFF display)

X

X

—

X

(for FR/B solenoid)

ATF PRES SW 2 (ON-OFF display)

X

X

—

X

(for LC/B solenoid)

ATF PRES SW 3 (ON-OFF display)

X

X

—

X

(for I/C solenoid)

ATF PRES SW 5 (ON-OFF display)

X

X

—

X

(for D/C solenoid)

ATF PRES SW 6 (ON-OFF display)

X

X

—

X

(for HLR/C solenoid)

PNP SW 1 (ON-OFF display)

X

—

—

X

PNP SW 2 (ON-OFF display)

X

—

—

X

PNP SW 3 (ON-OFF display)

X

—

—

X

PNP SW 4 (ON-OFF display)

X

—

—

X

1 POSITION SW (ON-OFF display)

X

—

—

X

SLCT LVR POSI

—

X

—

X

Selector lever position is recognized 
by the TCM.
For fail safe operation, the specific 
value used for control is displayed.

OD CONT SW (ON-OFF display)

X

—

—

X

Not mounted but displayed.

AT-92

TROUBLE DIAGNOSIS

POWERSHIFT SW (ON-OFF display)

X

—

—

X

Not mounted but displayed.

HOLD SW (ON-OFF display)

X

—

—

X

MANU MODE SW (ON-OFF display)

X

—

—

X

NON M-MODE SW (ON-OFF display)

X

—

—

X

UP SW LEVER (ON-OFF display)

X

—

—

X

DOWN SW LEVER (ON-OFF display)

X

—

—

X

SFT UP ST SW (ON-OFF display)

—

—

—

X

Not mounted but displayed.

SFT DWN ST SW (ON-OFF display)

—

—

—

X

ASCD-CRUISE (ON-OFF display)

—

—

—

X

ASCD-OD CUT (ON-OFF display)

—

—

—

X

ABS SIGNAL (ON-OFF display)

—

—

—

X

ACC OD CUT (ON-OFF display)

—

—

—

X

ACC SIGNAL (ON-OFF display)

—

—

—

X

TCS SIGNAL 2 (ON-OFF display)

—

—

—

X

TCS GR/P KEEP (ON-OFF display)

—

—

—

X

TCS SIGNAL 1 (ON-OFF display)

—

—

—

X

TCC SOLENOID (A)

—

X

—

X

LINE PRES SOL (A)

—

X

—

X

I/C SOLENOID (A)

—

X

—

X

FR/B SOLENOID (A)

—

X

—

X

D/C SOLENOID (A)

—

X

—

X

HLR/C SOL (A)

—

X

—

X

ON OFF SOL (ON-OFF display)

—

—

—

X

LC/B solenoid

TCC SOL MON (A)

—

—

—

X

L/P SOL MON (A)

—

—

—

X

I/C SL MON (A)

—

—

—

X

FR/B SOL MON (A)

—

—

—

X

D/C SOL MON (A)

—

—

—

X

HLR/C SOL MON (A)

—

—

—

X

ONOFF SOL MON (ON-OFF display)

—

—

—

X

LC/B solenoid

P POSI IND (ON-OFF display)

—

—

—

X

R POSI IND (ON-OFF display)

—

—

—

X

N POSI IND (ON-OFF display)

—

—

—

X

D POSI IND (ON-OFF display)

—

—

—

X

4TH POSI IND (ON-OFF display)

—

—

—

X

3RD POSI IND (ON-OFF display)

—

—

—

X

2ND POSI IND (ON-OFF display)

—

—

—

X

1ST POSI IND (ON-OFF display)

—

—

—

X

MANU MODE IND (ON-OFF display)

—

—

—

X

POWER M LAMP (ON-OFF display)

—

—

—

X

F-SAFE IND/L (ON-OFF display)

—

—

—

X

Monitored item (Unit)

Monitor Item Selection

Remarks

ECU 

INPUT 

SIGNALS

MAIN SIG-

NALS

CAN DIAG 

SUP-

PORT 

MNTR

SELEC-

TION 

FROM 
MENU