Infiniti FX35, FX50 (S51). Manual - part 1881

TCM

TM-331

< ECU DIAGNOSIS INFORMATION >

[7AT: RE7R01B (VK50VE)]

Protection Control

INFOID:0000000005250334

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.

P1815

Paddle
switch mal-
function

Only the paddle switch is prohibited

—

Only the paddle switch is prohibited

Gate switch
malfunction

Only the gate switch is prohibited

—

Only the gate switch is prohibited

Malfunction
of both
switches

Manual mode is prohibited

—

Manual mode is prohibited

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

• 150

C (302

Control at malfunction

Accelerator opening: 0.5/8 or less

TM-332

< ECU DIAGNOSIS INFORMATION >

[7AT: RE7R01B (VK50VE)]

TCM

DTC Inspection Priority Chart

INFOID:0000000005250335

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:0000000005250336

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-332, "DTC Inspection Priority Chart"

Normal return condition

• TCM electronic substrate temperature: Less than 140

C (284

and

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

Vehicle behavior

Accelerator opening: output torque of approximately 0.5/8

Priority

Detected items (DTC)

Reference

U1000 CAN COMM CIRCUIT

TM-249, "DTC Logic"

P0615 STARTER RELAY

TM-250, "DTC Logic"

P0705 T/M RANGE SWITCH A

TM-252, "DTC Logic"

P0710 FLUID TEMP SENSOR A

TM-253, "DTC Logic"

P0717 INPUT SPEED SENSOR A

TM-255, "DTC Logic"

P0720 OUTPUT SPEED SENSOR

TM-257, "DTC Logic"

P0740 TORQUE CONVERTER

TM-274, "DTC Logic"

P0745 PC SOLENOID A

TM-277, "DTC Logic"

P0750 SHIFT SOLENOID A

P0775 PC SOLENOID B

P0795 PC SOLENOID C

P2713 PC SOLENOID D

P2722 PC SOLENOID E

P2731 PC SOLENOID F

P2807 PC SOLENOID G

P0729 6GR INCORRECT RATIO

TM-261, "DTC Logic"

P0730 INCORRECT GR RATIO

TM-263, "DTC Logic"

P0731 1GR INCORRECT RATIO

TM-264, "DTC Logic"

P0732 2GR INCORRECT RATIO

TM-266, "DTC Logic"

P0733 3GR INCORRECT RATIO

TM-268, "DTC Logic"

P0734 4GR INCORRECT RATIO

TM-270, "DTC Logic"

P0735 5GR INCORRECT RATIO

TM-272, "DTC Logic"

P0744 TORQUE CONVERTER

TM-276, "DTC Logic"

P0780 SHIFT

TM-280, "DTC Logic"

P1730 INTERLOCK

TM-286, "DTC Logic"

P1734 7GR INCORRECT RATIO

TM-288, "DTC Logic"

P0725 ENGINE SPEED

TM-259, "DTC Logic"

P1705 TP SENSOR

TM-282, "DTC Logic"

P1721 VEHICLE SPEED SIGNAL

TM-284, "DTC Logic"

P1815 M-MODE SWITCH

TM-290, "DTC Logic"

TCM

TM-333

< ECU DIAGNOSIS INFORMATION >

[7AT: RE7R01B (VK50VE)]

*1: Refer to

TM-242, "Diagnosis Description"

*2: These numbers are prescribed by SAE J2012.

IGN COUNTER

IGN counter indicates the number of items that ignition switch is turned ON after DTC is detected.
• CAN malfunction
- The number is 0 when a malfunction is detected now.
- The number increases like 1

→

3...38

→

39 after returning to the normal condition whenever ignition

switch OFF

→

ON.

- The number is fixed to 39 until self-diagnosis results are erased if it is over 39.
• Except for CAN malfunction
- The number is 0 when a malfunction is detected now.
- The number increases like 1

→

3...254

→

255 after returning to the normal condition whenever ignition

switch OFF

→

ON.

- The number is fixed to 255 until self-diagnosis results are erased if it is over 255.

Items

(CONSULT-III screen terms)

DTC

Reference