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Nissan Altima L32. Manual - part 1513

TM-396

< ECU DIAGNOSIS >

[CVT: RE0F10A]

TCM

ABDIA0177GB

TCM

TM-397

< ECU DIAGNOSIS >

[CVT: RE0F10A]

Fail-safe

INFOID:0000000004201977

The TCM has an electrical fail-safe mode. This mode makes it possible to operate even if there is an error in a

main electronic control input/output signal circuit.

FAIL-SAFE FUNCTION

If any malfunction occurs in a sensor or solenoid, this function controls the CVT to make driving possible.

Output Speed Sensor (Secondary Speed Sensor)

ABDIA0178GB

TM-398

< ECU DIAGNOSIS >

[CVT: RE0F10A]

TCM

The shift pattern is changed in accordance with throttle position when an unexpected signal is sent from the

output speed sensor (secondary speed sensor) to the TCM. The manual mode position is inhibited, and the

transaxle is put in “D”.

Input Speed Sensor (Primary Speed Sensor)

The shift pattern is changed in accordance with throttle position and secondary speed (vehicle speed) when

an unexpected signal is sent from the input speed sensor (primary speed sensor) to the TCM. The manual

mode position is inhibited, and the transaxle is put in “D”.

PNP Switch

If an unexpected signal is sent from the PNP switch to the TCM, the transaxle is put in “D”.

Manual Mode Switch

If an unexpected signal is sent from the manual mode switch to the TCM, the transaxle is put in “D”.

CVT Fluid Temperature Sensor

If an unexpected signal is sent from the CVT fluid temperature sensor to the TCM, the gear ratio in use before

receiving the unexpected signal is maintained or the gear ratio is controlled to keep engine speed under 3,400

rpm.

Transmission Fluid Pressure Sensor A (Secondary Pressure Sensor)

• If an unexpected signal is sent from the transmission fluid pressure sensor A (secondary pressure sensor) to

the TCM, the secondary pressure feedback control is stopped and the offset value obtained before the non-

standard condition occurs is used to control line pressure.

• If transmission fluid pressure sensor A (secondary pressure sensor) error signal is input to TCM, secondary

pressure feedback control stops, but line pressure is controlled normally.

Pressure Control Solenoid A (Line Pressure Solenoid)

If an unexpected signal is sent from the solenoid to the TCM, the pressure control solenoid A (line pressure

solenoid) is turned OFF to achieve the maximum fluid pressure.

Pressure Control Solenoid B (Secondary Pressure Solenoid)

If an unexpected signal is sent from the solenoid to the TCM, the pressure control solenoid B (secondary pres-

sure solenoid) is turned OFF to achieve the maximum fluid pressure.

Torque Converter Clutch Solenoid

If an unexpected signal is sent from the solenoid to the TCM, the torque converter clutch solenoid is turned

OFF to cancel the lock-up.

Step Motor

If an unexpected signal is sent from the step motor to the TCM, the step motor coil phases “A” through “D” are

all turned OFF to hold the gear ratio used right before the non-standard condition occurred.

CVT Lock-up Select Solenoid

If an unexpected signal is sent from the solenoid to the TCM, the CVT lock-up select solenoid is turned OFF to

cancel the lock-up.

TCM Power Supply (Memory Back-up)

Transaxle assembly is protected by limiting the engine torque when the memory back-up power supply (for

controlling) from the battery is not supplied to TCM. Normal statues is restored when turning the ignition switch

OFF to ON after the normal power supply.

DTC Inspection Priority Chart

INFOID:0000000004201978

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

chart.

NOTE:

If DTC “U1000 CAN COMM CIRCUIT” is displayed with other DTCs, first perform the trouble diagnosis

for “DTC U1000 CAN COMMUNICATION LINE”. Refer to

TM-302

Priority

Detected items (DTC)

• U1000 CAN COMM CIRCUIT
• U1010 CONTROL UNIT (CAN)

Except above

TCM

TM-399

< ECU DIAGNOSIS >

[CVT: RE0F10A]

DTC Index

INFOID:0000000004201979

NOTE:

If DTC “U1000 CAN COMM CIRCUIT” is displayed with other DTCs, first perform the trouble diagnosis

for “DTC U1000 CAN COMMUNICATION LINE”. Refer to

TM-302

• *1: Refer to

TM-296, "Diagnosis Description"

• *2: These numbers are prescribed by SAE J2012.
• *3: Models without ABS does not indicate.

OBD-II (DTC)

TCM self-diagnosis

Items (CONSULT-III screen terms)

Reference

MIL

, “ENGINE” with CON-

SULT-III or GST

“TRANSMISSION” with

CONSULT-III

—

P0703

BRAKE SW/CIRC

TM-304

P0705

PNP SW/CIRC

TM-307

P0710

ATF TEMP SEN/CIRC

TM-310

P0715

INPUT SPD SEN/CIRC

TM-313

P0720

VEH SPD SEN/CIR AT

TM-318

—

P0725

ENGINE SPEED SIG

TM-322

—

P0730

BELT DAMG

TM-323

P0740

TCC SOLENOID/CIRC

TM-324

P0744

A/T TCC S/V FNCTN

TM-327

P0745

L/PRESS SOL/CIRC

TM-329

P0746

PRS CNT SOL/A FCTN

TM-331

P0776

PRS CNT SOL/B FCTN

TM-333

P0778

PRS CNT SOL/B CIRC

TM-336

—

P0826

MANUAL MODE SWITCH

TM-338

P0840

TR PRS SENS/A CIRC

TM-341

—

P0841

PRESS SEN/FNCTN

TM-344

—

P0868

SEC/PRESS DOWN

TM-346

—

P1701

TCM-POWER SUPPLY

TM-349

—

P1705

TP SEN/CIRC A/T

TM-352

—

P1722

ESTM VEH SPD SIG

TM-353

—

P1723

CVT SPD SEN/FNCTN

TM-355

—

P1726

ELEC TH CONTROL

TM-357

P1740

LU-SLCT SOL/CIRC

TM-358

—

P1745

L/PRESS CONTROL

TM-360

P1777

STEP MOTR CIRC

TM-361

P1778

STEP MOTR/FNC

TM-364

U1000

CAN COMM CIRCUIT

TM-302

U1010

CONTROL UNIT(CAN)

TM-303

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