Infiniti FX35, FX50 (S51). Manual - part 1835

TCM

TM-147

< ECU DIAGNOSIS INFORMATION >

[7AT: RE7R01A (VQ35HR)]

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Consequently, the customer's vehicle may already return to the normal condition. Refer to 

TM-7, "Diagnosis

Flow"

.

FAIL-SAFE FUNCTION

1st fail-safe

The mode that the vehicle can stop safely, to prompt the driver to stop if the malfunction occurs and to shift to 
2nd Fail-Safe early. It shifts to 2nd Fail-Safe or Final Fail-Safe after the vehicle stopped.

2nd fail-safe

The mode that the vehicle shifts to Final Fail-Safe without changing the behavior, by identifying the malfunc-
tioning parts in the condition that the driving force required for the driving is secured.

Final fail-safe

• Selects the shifting pattern that the malfunctioning parts identified at 1st and 2nd Fail-Safe are not used, and 

then secure the driving force that is required for the driving.

• The mode that the shifting performance does not decrease by normal shift control.

DTC

Vehicle 

condition

Vehicle behavior for 1st fail-safe

Vehicle behavior for 2nd fail-safe

Vehicle behavior for final fail-safe

P0615

—

Starter is disabled

—

Starter is disabled

P0705

—

• Fixed in the “D” position (The 

shifting can be performed)

• 30 km/h (19MPH) or less
• Lock-up is prohibited
• The shifting between the gears 

of 3 - 4 - 5 - 6 - 7 can be per-
formed 

• Manual mode is prohibited
• Shift position indicator is 

switched OFF

• Starter relay is switched OFF 

(starter is disabled)

• Back-up lamp is OFF
• Large shift shock

—

• Fixed in the “D” position (The 

shifting can be performed)

• 30 km/h (19MPH) or less
• Lock-up is prohibited
• The shifting between the gears 

of 3 - 4 - 5 - 6 - 7 can be per-
formed 

• Manual mode is prohibited
• Shift position indicator is 

switched OFF

• Starter relay is switched OFF 

(starter is disabled)

• Back-up lamp is OFF
• Large shift shock

P0710

Between 
the gears of 
1 - 2 - 3

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• Manual mode is prohibited

—

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• Manual mode is prohibited

Between 
the gears of 
4 - 5 - 6 - 7

• Fix the gear while driving
• Manual mode is prohibited

—

P0717

Between 
the gears of 
1 - 2 - 3

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• Manual mode is prohibited

—

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• Manual mode is prohibited

Between 
the gears of 
4 - 5 - 6 - 7

• Fix the gear while driving
• Manual mode is prohibited

—

P0720

Between 
the gears of 
1 - 2 - 3

• Only downshift can be per-

formed

• Manual mode is prohibited
• A vehicle speed signal from the 

unified meter and A/C amp. is re-
garded as an effective signal.

—

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• Manual mode is prohibited

Between 
the gears of 
4 - 5 - 6 - 7

• Fix the gear at driving
• Manual mode is prohibited
• A vehicle speed signal from the 

unified meter and A/C amp. is re-
garded as an effective signal.

—

TM-148

< ECU DIAGNOSIS INFORMATION >

[7AT: RE7R01A (VQ35HR)]

TCM

P0729
P0731
P0732
P0733
P0734
P0735
P1734

Neutral 
malfunction 
between 
the gears of 
1 - 2 - 3 and 
7

• Locks  in  4GR
• Manual mode is prohibited
• Neutral

—

• Locks in 1GR
• The shifting between the gears 

of 1 - 2 can be performed

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• The shifting between the gears 

of 4 - 5 - 6 can be performed

• Manual mode is prohibited

Other than 
the above

• Driving with the gear ratio be-

tween 1GR and 2GR

• Driving with the gear ratio be-

tween 2GR and 3GR

• Locks  in  3GR
• Locks  in  4GR
• Fix the gear while driving
• Manual mode is prohibited
• Neutral

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• Manual mode is prohibited

• Locks in 1GR
• The shifting between the gears 

of 1 - 2 can be performed

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• The shifting between the gears 

of 2 - 3 - 4 can be performed

• The shifting between the gears 

of 3 - 4 can be performed

• The shifting between the gears 

of 4 - 5 - 6 can be performed

• Manual mode is prohibited

P0730

—

• Manual mode is prohibited
• Neutral

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• Manual mode is prohibited

• Locks in 1GR
• The shifting between the gears 

of 1 - 2 can be performed

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• Manual mode is prohibited

P0740

—

• Lock-up is prohibited
• Slip lock-up is prohibited

—

• Lock-up is prohibited
• Slip lock-up is prohibited

P0744

—

• Lock-up is prohibited
• Slip lock-up is prohibited

—

• Lock-up is prohibited
• Slip lock-up is prohibited

P0750
P0775
P0795
P2713
P2722
P2731
P2807

—

• Locks in 2GR, 3GR, 4GR, 5GR, 

6GR or 7GR

• Manual mode is prohibited

—

• Locks in 1GR
• The shifting between the gears 

of 1 - 2 - 3 can be performed

• The shifting between the gears 

of 3 - 4 - 5 can be performed

• The shifting between the gears 

of 4 - 5 - 6 can be performed

• The shifting between the gears 

of 1 - 2 - 3 - 4 - 5 - 6 can be per-
formed

• Manual mode is prohibited

P0780

—

• Manual mode is prohibited
• Neutral

—

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• Manual mode is prohibited

P1705

—

• Downshift when accelerator ped-

al is depressed is prohibited

• Upshift when accelerator pedal 

is released is prohibited

• Manual mode is prohibited

• Downshift when accelerator ped-

al is depressed is prohibited

• Upshift when accelerator pedal 

is released is prohibited

• Manual mode is prohibited

• Downshift when accelerator ped-

al is depressed is prohibited

• Upshift when accelerator pedal 

is released is prohibited

• Manual mode is prohibited

P1730

—

• Neutral
• Driving with the gear ratio be-

tween 2GR and 3GR

• Locks in 5GR, 6GR or 7GR
• Manual mode is prohibited

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• Manual mode is prohibited

• Locks in 1GR
• The shifting between the gears 

of 2 - 3 - 4 can be performed

• The shifting between the gears 

of 3 - 4 can be performed

• The shifting between the gears 

of 4 - 5 - 6 can be performed

• Manual mode is prohibited

P1815

—

Manual mode is prohibited

—

Manual mode is prohibited

DTC

Vehicle 

condition

Vehicle behavior for 1st fail-safe

Vehicle behavior for 2nd fail-safe

Vehicle behavior for final fail-safe

TCM

TM-149

< ECU DIAGNOSIS INFORMATION >

[7AT: RE7R01A (VQ35HR)]

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Protection Control

INFOID:0000000005250137

The TCM becomes the protection control status temporarily to protect the safety when the safety of TCM and
transmission is lost. It automatically returns to the normal status if the safety is secured.
The TCM has the following protection control.

REVERSE INHIBIT CONTROL

Intercepts the torque transmission and shift to the neutral status if the selector lever is shifted to “R” position
while the vehicle moves forward at the vehicle speed 10 km/h (7 MPH) or more.

1ST ENGINE BRAKE PROTECTION CONTROL

Controls the engine brake so as not to make effective by turning the front brake solenoid output to OFF when
each solenoid becomes the electricity pattern of 1st engine brake during driving at the vehicle speed 25 km/h
or more in any positions other than “R” position or 1GR.

TCM HIGH TEMPERATURE PROTECTION CONTROL

Limit the accelerator opening and forcibly control the vehicle to the low torque driving when the electronic sub-
strate in TCM reaches the high temperature. 

U1000

Between 
the gears of 
1 - 2 - 3

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• Manual mode is prohibited

—

• The shifting between the gears 

of 1 - 2 - 3 can be performed

• Line pressure is set to the maxi-

mum hydraulic pressure

• Manual mode is prohibited

Between 
the gears of 
4 - 5 -6 - 7

• Fix the gear at driving
• Manual mode is prohibited

—

P0720

and

P1721

—

Locks in 5GR

—

Locks in 5GR

DTC

Vehicle 

condition

Vehicle behavior for 1st fail-safe

Vehicle behavior for 2nd fail-safe

Vehicle behavior for final fail-safe

Malfunction detection condition

Vehicle speed: 10 km/h (7 MPH) or more

Control at malfunction

Neutral

Normal return condition

• Vehicle speed: 8 km/h (5 MPH) or less

• Engine speed: 2,200 rpm or less

Vehicle behavior

• The torque transmission cannot be performed
• There is a shock just before a vehicle stop

Malfunction detection condition

• Select lever and gear: Except for “R” position and 1GR

and

• Vehicle speed: More than 25 km/h (16 MPH)

Control at malfunction

Front brake solenoid output signal; OFF

Normal return condition

Other than malfunction detection condition

Vehicle behavior

Does not exist

Malfunction detection condition

TCM electronic substrate temperature
• 145

°

C (293

°

F) and 120 seconds

or

• 150

°

C (302

°

F)

Control at malfunction

Accelerator opening: 0.5/8 or less

Normal return condition

• TCM electronic substrate temperature: Less than 140

°

C (284

°

F)

and

• Vehicle speed: 5 km/h (3 MPH) or less

Vehicle behavior

Accelerator opening: output torque of approximately 0.5/8

TM-150

< ECU DIAGNOSIS INFORMATION >

[7AT: RE7R01A (VQ35HR)]

TCM

DTC Inspection Priority Chart

INFOID:0000000005250138

If some DTCs are displayed at the same time, perform inspections one by one based on the priority as per the
following list.

DTC Index

INFOID:0000000005250139

NOTE:
If some DTCs are displayed at the same time, perform inspections one by one based on the priority as per the
following list. Refer to 

TM-150, "DTC Inspection Priority Chart"

.

Priority

Detected items (DTC)

Reference

1

U1000 CAN COMM CIRCUIT

TM-68, "DTC Logic"

2

P0615 STARTER RELAY

TM-69, "DTC Logic"

P0705 T/M RANGE SWITCH A

TM-71, "DTC Logic"

P0710 FLUID TEMP SENSOR A

TM-72, "DTC Logic"

P0717 INPUT SPEED SENSOR A

TM-74, "DTC Logic"

P0720 OUTPUT SPEED SENSOR

TM-76, "DTC Logic"

P0740 TORQUE CONVERTER

TM-94, "DTC Logic"

P0745 PC SOLENOID A

TM-97, "DTC Logic"

P0750 SHIFT SOLENOID A

TM-98, "DTC Logic"

P0775 PC SOLENOID B

TM-100, "DTC Logic"

P0795 PC SOLENOID C

TM-102, "DTC Logic"

P2713 PC SOLENOID D

TM-114, "DTC Logic"

P2722 PC SOLENOID E

TM-115, "DTC Logic"

P2731 PC SOLENOID F

TM-116, "DTC Logic"

P2807 PC SOLENOID G

TM-117, "DTC Logic"

3

P0729 6GR INCORRECT RATIO

TM-80, "DTC Logic"

P0730 INCORRECT GR RATIO

TM-82, "DTC Logic"

P0731 1GR INCORRECT RATIO

TM-84, "DTC Logic"

P0732 2GR INCORRECT RATIO

TM-86, "DTC Logic"

P0733 3GR INCORRECT RATIO

TM-88, "DTC Logic"

P0734 4GR INCORRECT RATIO

TM-90, "DTC Logic"

P0735 5GR INCORRECT RATIO

TM-92, "DTC Logic"

P0744 TORQUE CONVERTER

TM-96, "DTC Logic"

P0780 SHIFT

TM-101, "DTC Logic"

P1730 INTERLOCK

TM-107, "DTC Logic"

P1734 7GR INCORRECT RATIO

TM-109, "DTC Logic"

4

P0725 ENGINE SPEED

TM-78, "DTC Logic"

P1705 TP SENSOR

TM-103, "DTC Logic"

P1721 VEHICLE SPEED SIGNAL

TM-105, "DTC Logic"

P1815 M-MODE SWITCH

TM-111, "DTC Logic"

Items

(CONSULT-III screen terms)

DTC

*2

Reference

MIL

*1

, “ENGINE” with 

CONSULT-III or GST

CONSULT-III only 

“TRANSMISSION”

STARTER RELAY

—

P0615

TM-69

T/M RANGE SWITCH A

P0705

P0705

TM-71

FLUID TEMP SENSOR A

P0710

P0710

TM-72