Nissan Teana J32. Manual - part 1149

TM-120

< ECU DIAGNOSIS >

[CVT: RE0F09B]

TCM

Fail-safe

INFOID:0000000003849061

The TCM has an electrical fail-safe mode. In this mode TCM operates even if there is an error in a main elec-
tronic control input/output signal circuit.

FAIL-SAFE FUNCTION

If any malfunction occurs in a sensor or solenoid valve, this function controls the CVT to make driving possi-
ble.

JCDWM0247GB

TCM

TM-121

< ECU DIAGNOSIS >

[CVT: RE0F09B]

Output Speed Sensor (Secondary Speed Sensor)

The shift pattern is changed in accordance with the throttle position when an unexpected signal is sent from
the output speed sensor (secondary speed sensor) to the TCM. The sport mode is inhibited, and the transaxle
is put in “D”.

Input Speed Sensor (Primary Speed Sensor)

The shift pattern is changed in accordance with the 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 sport
mode 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”.

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 5,000
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 inputted to the TCM, sec-

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

Pressure Control Solenoid A (Line Pressure Solenoid Valve)

If an unexpected signal is sent from the solenoid valve to the TCM, the pressure control solenoid A (line pres-
sure solenoid valve) is turned OFF to achieve the maximum fluid pressure.

Pressure Control Solenoid B (Secondary Pressure Solenoid Valve)

If an unexpected signal is sent from the solenoid valve to the TCM, the pressure control solenoid B (secondary
pressure solenoid valve) is turned OFF to achieve the maximum fluid pressure.

Torque Converter Clutch Solenoid Valve

If an unexpected signal is sent from the solenoid valve to the TCM, the torque converter clutch solenoid valve
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 just before the non-standard condition occurred.

CVT Lock-up Select Solenoid Valve

If an unexpected signal is sent from the solenoid valve to the TCM, the CVT lock-up select solenoid valve 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 the TCM. Normal status is restored when turning the ignition
switch OFF to ON after the normal power supply.

DTC Inspection Priority Chart

INFOID:0000000003849062

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 indicated with other DTCs, start from a diagnosis for “DTC
U1000 CAN COMMUNICATION LINE”. Refer to

TM-41

DTC Index

INFOID:0000000003849063

NOTE:

Priority

Detected items (DTC)

U1000 CAN communication line

Except above

TM-122

< ECU DIAGNOSIS >

[CVT: RE0F09B]

TCM

If DTC “U1000 CAN COMM CIRCUIT” is indicated with other DTCs, start from a diagnosis for “DTC
U1000 CAN COMMUNICATION LINE”. Refer to

TM-41

• *1: These numbers are prescribed by ISO 15031-6.

• *2: Refer to

TM-35, "Diagnosis Description"

DTC

Items

(CONSULT-III screen terms)

Reference

MIL

, “ENGINE” with CON-

SULT-III or GST

CONSULT-III only “TRANS-

MISSION”

—

P0615

STARTER RELAY/CIRC

TM-42

—

P0703

BRAKE SW/CIRC

TM-44

P0705

PNP SW/CIRC

TM-47

P0710

ATF TEMP SEN/CIRC

TM-50

P0715

INPUT SPD SEN/CIRC

TM-52

P0720

VEH SPD SEN/CIR AT

TM-55

—

P0725

ENGINE SPEED SIG

TM-59

—

P0730

BELT DAMG

TM-60

P0740

TCC SOLENOID/CIRC

TM-62

P0744

A/T TCC S/V FNCTN

TM-64

P0745

L/PRESS SOL/CIRC

TM-66

P0746

PRS CNT SOL/A FCTN

TM-68

P0776

PRS CNT SOL/B FCTN

TM-70

P0778

PRS CNT SOL/B CIRC

TM-72

P0840

TR PRS SENS/A CIRC

TM-74

—

P0841

PRESS SEN/FNCTN

TM-77

P0845

TR PRS SENS/B CIRC

TM-80

—

P0868

SEC/PRESS DOWN

TM-83

—

P1701

TCM-POWER SUPPLY

TM-85

—

P1705

TP SEN/CIRC A/T

TM-88

—

P1722

ESTM VEH SPD SIG

TM-89

—

P1723

CVT SPD SEN/FNCTN

TM-91

—

P1726

ELEC TH CONTROL

TM-93

P1740

LU-SLCT SOL/CIRC

TM-94

—

P1745

L/PRESS CONTROL

TM-96

P1777

STEP MOTR CIRC

TM-97

P1778

STEP MOTR/FNC

TM-100

U1000

CAN COMM CIRCUIT

TM-41

SYSTEM SYMPTOM

TM-123

< SYMPTOM DIAGNOSIS >

[CVT: RE0F09B]

SYMPTOM DIAGNOSIS

SYSTEM SYMPTOM

Symptom Table

INFOID:0000000003849064

The diagnostics item numbers show the sequence for inspection. Inspect in order from item 1.

No.

Item

Symptom

Condition

Diagnostic item

Reference

Shift Shock

Large shock. (“N”

→

“D” position)

ON vehicle

1. Engine idle speed

EC-14

2. Engine speed signal

TM-59

3. Accelerator pedal position sensor

TM-88

4. CVT position

TM-152

5. CVT fluid temperature sensor

TM-50

6. CAN communication line

TM-41

7. CVT fluid level and state

TM-142

8. Line pressure test

TM-146

9. Torque converter clutch solenoid valve

TM-62

10. Lock-up select solenoid valve

TM-94

11. PNP switch

TM-44

OFF vehicle

12. Forward clutch

TM-168

13. Control valve

Large shock. (“N”

→

“R” position)

ON vehicle

1. Engine idle speed

EC-14

2. Engine speed signal

EC-14

3. Accelerator pedal position sensor

TM-88

4. CVT position

TM-152

5. CVT fluid temperature sensor

TM-50

6. CAN communication line

TM-41

7. CVT fluid level and state

TM-142

8. Line pressure test

TM-146

9. Torque converter clutch solenoid valve

TM-62

10. Lock-up select solenoid valve

TM-94

11. PNP switch

TM-44

OFF vehicle

12. Reverse brake

TM-168

13. Control valve

Shock is too large for
lock-up.

ON vehicle

1. CVT position

TM-152

2. Engine speed signal

TM-59

3. CAN communication line

TM-41

4. CVT fluid level and state

TM-142

OFF vehicle

5. Torque converter

TM-172

6. Control valve

TM-168

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