Index Instructions Nissan Pathfinder (2010 year) - Service and Repair Instruction

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Nissan Pathfinder (2010 year). Instruction - part 624

TM-120

< ECU DIAGNOSIS >

TCM

ABDIA0400GB

2010 Pathfinder

TCM

TM-121

< ECU DIAGNOSIS >

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ABDIA0401GB

2010 Pathfinder

TM-122

< ECU DIAGNOSIS >

TCM

ABDIA0402GB

2010 Pathfinder

TCM

TM-123

< ECU DIAGNOSIS >

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Fail-Safe

INFOID:0000000005258137

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. In fail-safe mode the transmission is fixed in 2nd, 4th or 5th

(depending on the breakdown position), so the customer should feel “slipping” or “poor acceleration”.

Even when the electronic circuits are normal, under special conditions (for example, when slamming on the

brake with the wheels spinning drastically and stopping the tire rotation), the transmission can go into fail-safe

mode. If this happens, switch “OFF” the ignition switch for 10 seconds, then switch it “ON” again to return to

ABDIA0403GB

2010 Pathfinder

TM-124

< ECU DIAGNOSIS >

TCM

the normal shift pattern. Therefore, the customer's vehicle has returned to normal, so handle according to the

“diagnostics flow” (Refer to

TM-7, "Diagnostic Work Sheet"

).

FAIL-SAFE FUNCTION

If any malfunction occurs in a sensor or solenoid, this function controls the A/T to mark driving possible.

Output Speed Sensor

• Signals are input from two systems - from output speed sensor installed on the transmission and from com-

bination meter so normal driving is possible even if there is a malfunction in one of the systems. And if output

speed sensor has unusual cases, 5GR is prohibited.

Accelerator Pedal Position Sensor

• If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM according

to a pre-determined accelerator angle to make driving possible. And if there are malfunctions in tow sys-

tems, the engine speed is fixed by ECM to a pre-determined engine speed to make driving possible.

Throttle Position Sensor

• If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM according

to a pre-determined accelerator angle to make driving possible. And if there are malfunctions in tow sys-

tems, the accelerator opening angle is controlled by the idle signal sent from the ECM which is based on

input indicating either idle condition or off-idle condition (pre-determined accelerator opening) in order to

make driving possible.

Transmission Range Switch

• In the unlikely event that a malfunction signal enters the TCM, the position indicator is switched “OFF”, the

starter relay is switched “OFF” (starter starting is disabled), the back-up lamp relay switched “OFF” (back-up

lamp is OFF) and the position is fixed to the “D” range to make driving possible.

Starter Relay

• The starter relay is switched “OFF”. (Starter starting is disabled.)

Interlock

• If there is an interlock judgment malfunction, the transmission is fixed in 2GR to make driving possible.

NOTE:

When the vehicle is driven fixed in 2GR, a input speed sensor malfunction is displayed, but this is

not a input speed sensor malfunction.

• When interlock is detected at the 3GR or more, it is locked at the 2GR.

1st Engine Braking

• When there is an 1st engine brake judgment malfunction, the low coast brake solenoid is switched “OFF” to

avoid the engine brake operation.

Line Pressure Solenoid

• The solenoid is switched “OFF” and the line pressure is set to the maximum hydraulic pressure to make driv-

ing possible.

Torque Converter Clutch Solenoid

• The solenoid is switched “OFF” to release the lock-up.

Low Coast Brake Solenoid

• When a (electrical or functional) malfunction occurs, in order to make driving possible, the engine brake is

not applied in 1GR and 2GR.

Input Clutch Solenoid

• If a (electrical or functional) malfunction occurs with the solenoid either “ON” or “OFF”, the transmission is

held in 4GR to make driving possible.

Direct Clutch Solenoid

• If a (electrical or functional) malfunction occurs with the solenoid either “ON” or “OFF”, the transmission is

held in 4GR to make driving possible.

Front Brake Solenoid

• If a (electrical or functional) malfunction occurs with the solenoid “ON”, in order to make driving possible, the

A/T is held in 5GR; if the solenoid is OFF, 4GR.

High and Low Reverse Clutch Solenoid

• If a (electrical or functional) malfunction occurs with the solenoid either “ON” or “OFF”, the transmission is

held in 4GR to make driving possible.

2010 Pathfinder

TCM

TM-125

< ECU DIAGNOSIS >

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Input Speed Sensor 1 or 2

• The control is the same as if there were no turbine revolution sensors, 5GR is prohibited.

DTC Inspection Priority Chart

INFOID:0000000005258138

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

chart.

NOTE:

If DTC U1000 is displayed with other DTCs, first perform the trouble diagnosis for DTC U1000. Refer to

DTC No. Index

INFOID:0000000005258139

NOTE:

If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to

Priority

Detected items (DTC)

1

U1000 CAN COMM CIRCUIT

2

Except above

DTC

Items

(CONSULT- III screen terms)

Reference page

OBD- II

Except OBD- II

CONSULT- III

GST (*1)

CONSULT- III

only “TRANSMIS-

SION”

—

P0615

STARTER RELAY

P0700

P0700

TRANSMISSION CONTROL

P0705

P0705

T/M RANGE SWITCH A

P0710

P1710

FLUID TEMP SENSOR A

P0717

P0717

INPUT SPEED SENSOR A

P0720

P0720

OUTPUT SPEED SENSOR

—

P0725

ENGINE SPEED

P0731

P0731

1GR INCORRECT RATIO

P0732

P0732

2GR INCORRECT RATIO

P0733

P0733

3GR INCORRECT RATIO

P0734

P0734

4GR INCORRECT RATIO

P0735

P0735

5GR INCORRECT RATIO

P0740

P0740

TORQUE CONVERTER

P0744 (*2)

P0744

TORQUE CONVERTER

P0745

P0745

PC SOLENOID A

—

P1705

TP SENSOR

—

P1721

VEHICLE SPEED SIGNAL

P1730

P1730

INTERLOCK

—

P1731

1GR E/BRAKING

P1752

P1752

INPUT CLUTCH SOL

P1757

P1757

FR BRAKE SOLENOID

P1762

P1762

DRCT CLUTCH SOL

P1767

P1767

HLR CLUTCH SOLENOID

P1772

P1772

LC BRAKE SOLENOID

P1774 (*2)

P1774

LC BRAKE SOLENOID

2010 Pathfinder

TM-126

< ECU DIAGNOSIS >

TCM

*1: These numbers are prescribed by SAE J2012.
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.
*3: With instruction mode.

—

P1815

M-MODE SWITCH (*3)·

U1000

U1000

CAN COMM CIRCUIT

DTC

Items

(CONSULT- III screen terms)

Reference page

OBD- II

Except OBD- II

CONSULT- III

GST (*1)

CONSULT- III

only “TRANSMIS-

SION”

2010 Pathfinder

SYSTEM SYMPTOM

TM-127

< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

SYSTEM SYMPTOM

Symptom Chart

INFOID:0000000005258164

•

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

•

Overhaul and inspect inside the A/T only if A/T fluid condition is NG. Refer to

TM-155, "Checking the

A/T Fluid (ATF)"

No.

Items

Symptom

Condition

Diagnostic Item

Reference

page

1

Shift
Shock

Large shock. (“N”

→

“

D” position)

ON vehicle

1. Engine idle speed

(VQ40DE)

(VK56DE)

2. Engine speed signal

3. Accelerator pedal position sensor

4. Control cable adjustment

5. ATF temperature sensor

6. Front brake solenoid valve

7. CAN communication line

8. Fluid level and state

9. Line pressure test

10. Control valve with TCM

OFF vehicle

11. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to

2

Shock is too large
when changing D

1

→

D

2

.

ON vehicle

1. Accelerator pedal position sensor

2. Control cable adjustment

3. Direct clutch solenoid valve

4. CAN communication line

5. Engine speed signal

6. Input speed sensor

7. Output speed sensor and vehicle speed signal

8. Fluid level and state

9. Control valve with TCM

OFF vehicle

10. Direct clutch

3

Shock is too large
when changing D

2

→

D

3

.

ON vehicle

1. Accelerator pedal position sensor

2. Control cable adjustment

3. High and low reverse clutch solenoid valve

4. CAN communication line

5. Engine speed signal

6. Input speed sensor

7. Output speed sensor and vehicle speed signal

8. Fluid level and state

9. Control valve with TCM

OFF vehicle

10. High and low reverse clutch

2010 Pathfinder

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