Infiniti FX35, FX50 (S51). Manual — part 1880

TCM

TM-327

< ECU DIAGNOSIS INFORMATION >

[7AT: RE7R01B (VK50VE)]

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JCDWA0563GB

TM-328

< ECU DIAGNOSIS INFORMATION >

[7AT: RE7R01B (VK50VE)]

TCM

Fail-Safe

INFOID:0000000005250333

TCM has the electrical fail-safe mode. The mode is divided into a maximum of 3 phases (1st Fail-Safe, 2nd
Fail-Safe and Final Fail-Safe) and functions so that the operation can be continued even if the signal circuit of
the main electronically controlled input/output parts is damaged.
Even if the electronic circuit is normal, the fail-safe mode may start under special conditions (such as when the
brake pedal is depressed suddenly from a hard wheel spin status to stop the rotation of wheels). In this case,
turn the ignition switch OFF and back to ON after 5 seconds to resume the normal shift pattern.

JCDWA0564GB

TCM

TM-329

< ECU DIAGNOSIS INFORMATION >

[7AT: RE7R01B (VK50VE)]

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

TM-189, "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-330

< ECU DIAGNOSIS INFORMATION >

[7AT: RE7R01B (VK50VE)]

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

DTC

Vehicle

condition

Vehicle behavior for 1st fail-safe

Vehicle behavior for 2nd fail-safe

Vehicle behavior for final fail-safe