Automatic Transmission: Other Nissan Pathfinder III рестайлинг

DETAILED FLOW

1. COLLECT THE INFORMATION FROM THE CUSTOMER Get the detailed information from the customer about the symptom (the condition and the environment when the incident/malfunction occurred) using diagnosis worksheet. Refer to " «DIAGNOSTIC WORK SHEET»(ref-519782-S28627795542012122900000) ". GO TO 2.
2. CHECK SYMPTOM 1 Check the following items based on the information obtained from the customer. Fail-safe. Refer to " «FAIL-SAFE»(ref-519782-S00605534152012122900000) ". A/T fluid inspection. Refer to " «CHECKING THE A/T FLUID (ATF)»(ref-519782-S04691492202012122900000) ". Stall test. Refer to " «STALL TEST»(ref-519782-S24914538752012122900000) ". Line pressure test. Refer to " «LINE PRESSURE TEST»(ref-519782-S26692894332012122900000) ". GO TO 3.
3. CHECK DTC Check DTC. Perform the following procedure if DTC is detected. Record DTC. Erase DTC. Refer to " «OBD-II DIAGNOSTIC TROUBLE CODE (DTC)»(ref-519782-S00734681662012122900000) ". Is any DTC detected? YES: GO TO 4. NO: GO TO 6 .
4. PERFORM DIAGNOSTIC PROCEDURE Perform "Diagnosis Procedure" for the displayed DTC. GO TO 5.
5. PERFORM DTC CONFIRMATION PROCEDURE Perform "DTC CONFIRMATION PROCEDURE". Is DTC detected? YES: GO TO 4 . NO: GO TO 6.
6. CHECK SYMPTOM 2 Try to confirm the symptom described by the customer. Is any malfunction present? YES: GO TO 7. NO: INSPECTION END
7. ROAD TEST Perform "ROAD TEST". Refer to " «CHECK BEFORE ENGINE IS STARTED»(ref-519782-S00654322792012122900000) ". GO TO 8.
8. CHECK SYMPTOM 3 Try to confirm the symptom described by the customer. Is any malfunction present? YES: GO TO 2 . NO: INSPECTION END

INFORMATION FROM CUSTOMER

KEY POINTS

Scheme 378

1. WHAT ..... Vehicle and A/T model
2. WHEN ..... Date, Frequencies
3. WHERE ..... Road conditions
4. HOW ..... Operating conditions, Symptoms

Scheme 379

Scheme 380

Scheme 381

Shift Mechanism

The automatic transmission uses compact triple planetary gear systems to improve power-transmission efficiency, simplify construction and reduce weight.

It also employs an optimum shift control and super wide gear ratios. They improve starting performance and acceleration during medium and high-speed operation.

Scheme 382

FUNCTION OF CLUTCH AND BRAKE

CLUTCH AND BAND CHART (Without Manual Mode)

Scheme 383

CLUTCH AND BAND CHART (With Manual Mode)

Scheme 384

POWER TRANSMISSION

"N" Position

Since both the forward brake and the reverse brake are released, torque from the input shaft drive is not transmitted to the output shaft.

"P" Position

Scheme 385

1. The same as for the "N" position, both the forward brake and the reverse brake are released, so torque from the input shaft drive is not transmitted to the output shaft.
2. The parking pawl linked with the select lever meshes with the parking gear and fastens the output shaft mechanically.

"D1" Position (With Manual Mode) / "D1", "31" and "21" Positions (Without Manual Mode)

Scheme 386

1. The forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
2. The 1st one-way clutch regulates reverse rotation of the rear sun gear.
3. The 3rd one-way clutch regulates reverse rotation of the front sun gear.
4. During deceleration, the mid sun gear turns forward, so the forward one-way clutch idles and the engine brake is not activated.

"M1" Position (With Manual Mode) / "11" Position (Without Manual Mode)

Scheme 387

1. The front brake fastens the front sun gear.
2. The forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
3. High and low reverse clutch connects the rear sun gear and the mid sun gear.
4. The low coast brake fastens the mid sun gear.
5. During deceleration, the low coast brake regulates forward rotation of the mid sun gear and the engine brake functions.

"D2" Position (with Manual Mode) / "D2" and "32" Positions (Without Manual Mode)

Scheme 388

1. The forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
2. The 3rd one-way clutch regulates reverse rotation of the front sun gear.
3. The direct clutch is coupled and the rear carrier and rear sun gear are connected.
4. During deceleration, the mid sun gear turns forward, so the forward one-way clutch idles and engine brake is not activated.

"M2" Position (With Manual Mode) / "22" and "12" Positions (Without Manual Mode)

Scheme 389

1. The front brake fastens the front sun gear.
2. The forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
3. The direct clutch is coupled, and the rear carrier and rear sun gear are connected.
4. The low coast brake fastens the mid sun gear.
5. During deceleration, the low coast brake regulates forward rotation of the mid sun gear and the engine brake functions.

"D3" Position (With Manual Mode) / "D3" and "33" Positions (Without Manual Mode)

Scheme 390

1. The front brake fastens the front sun gear.
2. The direct clutch is coupled, and the rear carrier and rear sun gear are connected.
3. The high and low reverse clutch is coupled and the mid sun gear and rear sun gear are connected.

"D4" and "M4" Positions (With Manual Mode) / "D4" Position (Without Manual Mode)

Scheme 391

1. The direct clutch is coupled, and the rear carrier and rear sun gear are connected.
2. The high and low reverse clutch is coupled and the mid sun gear and rear sun gear are connected.
3. The input clutch is coupled and the front internal gear and mid internal gear are connected.
4. The drive power is conveyed to the front internal gear, mid internal gear, and rear carrier and the three planetary gears rotate forward as one unit.

"D5" and "M5" Positions (With Manual Mode) / "D5" Position (Without Manual Mode)

Scheme 392

1. The front brake fastens the front sun gear.
2. The input clutch is coupled and the front internal gear and mid internal gear are connected.
3. The high and low reverse clutch is coupled and the mid sun gear and rear sun gear are connected.

"R" Position

Scheme 393

1. The front brake fastens the front sun gear.
2. The high and low reverse clutch is coupled, and the mid sun gear and rear sun gear are connected.
3. The reverse brake fastens the rear carrier.

TCM Function

The function of the TCM is to

1. Receive input signals sent from various switches and sensors.
2. Determine required line pressure, shifting point, lock-up operation, and engine brake operation.
3. Send required output signals to the respective solenoids.

CONTROL SYSTEM OUTLINE (WITHOUT MANUAL MODE)

The A/T senses vehicle operating conditions through various sensors or signals. It always controls the optimum shift position and reduces shifting and lock-up shocks.

Scheme 394

CONTROL SYSTEM OUTLINE (WITH MANUAL MODE)

The A/T senses vehicle operating conditions through various sensors or signals. It always controls the optimum shift position and reduces shifting and lock-up shocks.

Scheme 395

Input/Output Signal of TCM

Scheme 396

1. When an input torque signal equivalent to the engine drive force is sent from the ECM to the TCM, the TCM controls the line pressure solenoid.
2. This line pressure solenoid controls the pressure regulator valve as the signal pressure and adjusts the pressure of the operating oil discharged from the oil pump to the line pressure most appropriate to the driving state.

LINE PRESSURE CONTROL IS BASED ON THE TCM LINE PRESSURE CHARACTERISTIC PATTERN

1. The TCM has stored in memory a number of patterns for the optimum line pressure characteristic for the driving state.
2. In order to obtain the most appropriate line pressure characteristic to meet the current driving state, the TCM controls the line pressure solenoid current value and thus controls the line pressure.

Normal Control

Each clutch is adjusted to the necessary pressure to match the engine drive force.

Scheme 397

Back-up Control (Engine Brake)

When the select operation is performed during driving and the transmission is shifted down, the line pressure is set according to the vehicle speed.

Scheme 398

During Shift Change

The necessary and adequate line pressure for shift change is set. For this reason, line pressure pattern setting corresponds to input torque and gearshift selection. Also, line pressure characteristic is set according to engine speed, during engine brake operation.

Scheme 399

At Low Fluid Temperature

When the A/T fluid temperature drops below the prescribed temperature, in order to speed up the action of each friction element, the line pressure is set higher than the normal line pressure characteristic.

Scheme 400

Shift Control

The clutch pressure control solenoid is controlled by the signals from the switches and sensors. Thus, the clutch pressure is adjusted to be appropriate to the engine load state and vehicle driving state. It becomes possible to finely control the clutch hydraulic pressure with high precision and a smoother shift change characteristic is attained.

Scheme 401

SHIFT CHANGE

The clutch is controlled with the optimum timing and oil pressure by the engine speed, engine torque information, etc.

Shift Change System Diagram

Scheme 402

Lock-up Control

The torque converter clutch piston in the torque converter is engaged to eliminate torque converter slip to increase power transmission efficiency.

The torque converter clutch control valve operation is controlled by the torque converter clutch solenoid valve, which is controlled by a signal from TCM, and the torque converter clutch control valve engages or releases the torque converter clutch piston.

LOCK-UP OPERATION CONDITION CHART (WITHOUT MANUAL MODE)

LOCK-UP OPERATION CONDITION CHART (WITH MANUAL MODE)

SMOOTH LOCK-UP CONTROL

When shifting from the lock-up released state to the lock-up applied state, the current output to the torque converter clutch solenoid is controlled with the TCM. In this way, when shifting to the lock-up applied state, the torque converter clutch is temporarily set to the half-clutched state to reduce the shock.

Half-clutched State

1. The current output from the TCM to the torque converter clutch solenoid is varied to gradually increase the torque converter clutch solenoid pressure. In this way, the lock-up apply pressure gradually rises and while the torque converter clutch piston is put into half-clutched status, the torque converter clutch piston operating pressure is increased and the coupling is completed smoothly.

Slip Lock-up Control

1. In the slip region, the torque converter clutch solenoid current is controlled with the TCM to put it into the half-clutched state. This absorbs the engine torque fluctuation and lock-up operates from low speed. This raises the fuel efficiency for 4GR and 5GR at both low speed and when the accelerator has a low degree of opening.

Scheme 403

1. The forward one-way clutch transmits the drive force from the engine to the rear wheels. But the reverse drive from the rear wheels is not transmitted to the engine because the one-way clutch is idling. Therefore, the low coast brake solenoid is operated to prevent the forward one-way clutch from idling and the engine brake is operated in the same manner as conventionally.
2. The operation of the low coast brake solenoid switches the low coast brake switching valve and controls the coupling and releasing of the low coast brake. The low coast brake reducing valve controls the low coast brake coupling force.

FUNCTION OF CONTROL VALVE

FUNCTION OF PRESSURE SWITCH

Scheme 404

1. TCM (transmission control module)
2. Input speed sensor 1
3. Input speed sensor 2
4. Output speed sensor
5. A/T fluid temperature sensor
6. Transmission range switch
7. Line pressure solenoid valve
8. Torque converter clutch solenoid valve
9. Direct clutch solenoid valve
10. High and low reverse clutch solenoid valve
11. Input clutch solenoid valve
12. Front brake solenoid valve
13. Low coast brake solenoid valve
14. ATF pressure switch 2

OBD-II Function for A/T System

The ECM provides emission-related on board diagnostic (OBD-II) functions for the A/T system. One function is to receive a signal from the TCM used with OBD-related parts of the A/T system. The signal is sent to the ECM when a malfunction occurs in the corresponding OBD-related part. The other function is to indicate a diagnostic result by means of the MIL (malfunction indicator lamp) on the instrument panel. Sensors, switches and solenoid valves are used as sensing elements.

The MIL automatically illuminates in One or Two Trip Detection Logic when a malfunction is sensed in relation to A/T system parts.

ONE TRIP DETECTION LOGIC

If a malfunction is sensed during the first test drive, the MIL will illuminate and the malfunction will be stored in the ECM memory as a DTC. The TCM is not provided with such a memory function.

TWO TRIP DETECTION LOGIC

When a malfunction is sensed during the first test drive, it is stored in the ECM memory as a 1st trip DTC (diagnostic trouble code) or 1st trip freeze frame data. At this point, the MIL will not illuminate. - 1st Trip

If the same malfunction as that experienced during the first test drive is sensed during the second test drive, the MIL will illuminate. - 2nd Trip

The "Trip" in the "One or Two Trip Detection Logic" means a driving mode in which self-diagnosis is performed during vehicle operation.

FUNCTION

DATA MONITOR MODE

Display Items List

Possible Cause

Harness or connectors

(CAN communication line is open or shorted.)

CONSULT Reference Value in Data Monitor Mode

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The starter relay and TCM circuit is open or shorted.)
2. Starter relay

TCM.

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The transmission range switch 1, 2, 3, 4 and TCM circuit is open or shorted.)
2. Transmission range switch 1, 2, 3, 4

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The sensor circuit is open or shorted.)
2. Input speed sensor 1, 2

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The sensor circuit is open or shorted.)
2. Output speed sensor
3. Vehicle speed signal

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

Harness or connectors

(The ECM to the TCM circuit is open or shorted.)

1. Harness or connectors (Solenoid circuits are open or shorted.)
2. Input clutch solenoid valve
3. Front brake solenoid valve
4. Direct clutch solenoid valve
5. High and low reverse clutch solenoid valve
6. Each clutch
7. Hydraulic control circuit

1. Harness or connectors (Solenoid circuits are open or shorted.)
2. Input clutch solenoid valve
3. Front brake solenoid valve
4. Direct clutch solenoid valve
5. High and low reverse clutch solenoid valve
6. Each clutch
7. Hydraulic control circuit

1. Harness or connectors (Solenoid circuits are open or shorted.)
2. Input clutch solenoid valve
3. Front brake solenoid valve
4. Direct clutch solenoid valve
5. High and low reverse clutch solenoid valve
6. Each clutch
7. Hydraulic control circuit

1. Harness or connectors (Solenoid circuits are open or shorted.)
2. Input clutch solenoid valve
3. Front brake solenoid valve
4. Direct clutch solenoid valve
5. High and low reverse clutch solenoid valve
6. Each clutch
7. Hydraulic control circuit

1. Harness or connectors (Solenoid circuits are open or shorted.)
2. Input clutch solenoid valve
3. Front brake solenoid valve
4. Direct clutch solenoid valve
5. High and low reverse clutch solenoid valve
6. Each clutch
7. Hydraulic control circuit

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Torque converter clutch solenoid valve
2. Harness or connectors (The solenoid circuit is open or shorted.)

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The solenoid circuit is open or shorted.)
2. Torque converter clutch solenoid valve
3. Hydraulic control circuit

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The solenoid circuit is open or shorted.)
2. Line pressure solenoid valve

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

Harness or connectors

(The sensor circuit is open or shorted.)

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The sensor circuit is open or shorted.)
2. A/T fluid temperature sensor

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

Harness or connectors

(The sensor circuit is open or shorted.)

1. Harness or connectors (The solenoid and switch circuit is open or shorted.)
2. Low coast brake solenoid valve
3. ATF pressure switch 2

Judgment of Interlock

When interlock is judged to be malfunctioning, the vehicle should be fixed in 2GR, and should be set in a condition in which it can travel.

When one of the following fastening patterns is detected, the fail-safe function in correspondence with the individual pattern should be performed.

Note. When the vehicle is driven 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.

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The sensor circuit is open or shorted.)
2. Low coast brake solenoid valve
3. ATF pressure switch 2

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The solenoid circuit is open or shorted.)
2. Input clutch solenoid valve

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The solenoid circuit is open or shorted.)
2. Front brake solenoid valve

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The solenoid circuit is open or shorted.)
2. Direct clutch solenoid valve

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The solenoid circuit is open or shorted.)
2. High and low reverse clutch solenoid valve

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The solenoid circuit is open or shorted.)
2. Low coast brake solenoid valve

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (The solenoid and switch circuits are open or shorted.)
2. Low coast brake solenoid valve
3. ATF pressure switch 2

CONSULT REFERENCE VALUE IN DATA MONITOR MODE

1. Harness or connectors (These switches circuit is open or shorted.)
2. Manual mode select switch (Into A/T shift selector)
3. Manual mode position select switch (Into A/T shift selector)

MANUAL MODE SWITCH

Check continuity between A/T shift selector connector (A) terminals.

Scheme 405

Scheme 406

Scheme 407

Scheme 408

Scheme 409

Scheme 410

1. CHECK TCM POWER SOURCE STEP 1 Turn ignition switch OFF. Disconnect A/T assembly harness connector. Check voltage between A/T assembly harness connector terminals and ground. Item Connector Terminal Voltage TCM F9 1 - Ground Battery voltage 2 - Ground 6 - Ground 0V OK or NG OK: GO TO 2. NG: GO TO 3 .
2. CHECK TCM POWER SOURCE STEP 2 Disconnect A/T assembly harness connector. Turn ignition switch ON. (Do not start engine.) Check voltage between A/T assembly harness connector terminals and ground. Item Connector Terminal Voltage TCM F9 1 - Ground Battery voltage 2 - Ground 6 - Ground OK or NG OK: GO TO 4 . NG: GO TO 3.
3. DETECT MALFUNCTIONING ITEM Check the following. Harness for short or open between battery and A/T assembly harness connector terminals 1, 2 Harness for short or open between ignition switch and A/T assembly harness connector terminal 6 10A fuse (No. 22, located in the fuse and fusible link block) and 10A fuse (No. 49, located in the IPDM E/R) Ignition switch. Refer to " «WIRING DIAGRAM - IGNITION POWER SUPPLY»(ref-553889-S18893893712013051800000) ". OK or NG OK: GO TO 4. NG: Repair or replace damaged parts.
4. CHECK TCM GROUND CIRCUIT Turn ignition switch OFF. Disconnect A/T assembly harness connector. Check continuity between A/T assembly harness connector terminals and ground. Item Connector Terminal Continuity TCM F9 5, 10 - Ground Yes If OK, check harness for short to ground and short to power. OK or NG OK: GO TO 5. NG: Repair open circuit or short to ground or short to power in harness or connectors.
5. DETECT MALFUNCTIONING ITEM Check the following. The A/T assembly harness connector terminals for damage or loose connection with harness connector. OK or NG OK: GO TO 6. NG: Repair or replace damaged parts.
6. PERFORM SELF-DIAGNOSIS Perform self-diagnosis. Refer to " «CONSULT FUNCTION (TRANSMISSION)»(ref-519782-S28236871182012122900000) ". OK or NG OK: INSPECTION END NG-1 >> Self-diagnosis does not activate: GO TO 7. NG-2 >> DTC is displayed: Check the malfunctioning system. Refer to " «CONSULT FUNCTION (TRANSMISSION)»(ref-519782-S28236871182012122900000) ".
7. CHECK TERMINAL CORD ASSEMBLY Remove control valve with TCM. Refer to " «REMOVAL AND INSTALLATION»(ref-519782-S21478188802012122900000) ". Disconnect A/T assembly harness connector and TCM connector. Check continuity between A/T assembly harness connector terminals and TCM connector terminals. Item Connector Terminal Continuity A/T assembly harness connector F9 1 Yes TCM connector F502 9 A/T assembly harness connector F9 2 Yes TCM connector F502 10 A/T assembly harness connector F9 6 Yes TCM connector F502 4 Check continuity between A/T assembly harness connector terminals and TCM connector terminals. Item Connector Terminal Continuity A/T assembly harness connector F9 5 Yes TCM connector F504 21 A/T assembly harness connector F9 10 Yes TCM connector F504 22 If OK, check harness for short to ground and short to power. OK or NG OK: Replace the control valve with TCM. Refer to " «REMOVAL AND INSTALLATION»(ref-519782-S21478188802012122900000) ". NG: Replace open circuit or short to ground and short to power in harness or connectors.

Scheme 411

1. CHECK CAN COMMUNICATION LINE Perform the self-diagnosis. Refer to " «CONSULT FUNCTION (TRANSMISSION)»(ref-519782-S28236871182012122900000) ". Is a malfunction in the CAN communication indicated in the results? YES: Check CAN communication line. Refer to «U1000 CAN COMM CIRCUIT»(ref-519782-S20406462222012122900000) . NO: GO TO 2.
2. CHECK STOP LAMP SWITCH CIRCUIT With CONSULT Turn ignition switch "ON". (Do not start engine.) Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT. Read out ON/OFF switching action of the "BRAKE SW". OK or NG OK: INSPECTION END NG: GO TO 3.
3. CHECK STOP LAMP SWITCH Check continuity between stop lamp switch harness connector terminals 1 and 2. Item Condition Terminal Continuity Stop lamp switch harness connector When brake pedal is depressed 1 - 2 Yes When brake pedal is released No Check stop lamp switch after adjusting brake pedal - refer to " «INSPECTION AND ADJUSTMENT - STANDARD PEDAL»(ref-519770-S33404762712012122900000) " or " «INSPECTION AND ADJUSTMENT - ADJUSTABLE PEDAL»(ref-519770-S14752668032012122900000) ". OK or NG OK: Check the following. If NG, repair or replace damaged parts. Harness for short or open between battery and stop lamp switch. Harness for short or open between stop lamp switch and combination meter. NG: Repair or replace the stop lamp switch.

Scheme 412

Scheme 413

1. CHECK CAN COMMUNICATION LINE Perform the self-diagnosis. Refer to " «CONSULT FUNCTION (TRANSMISSION)»(ref-519782-S28236871182012122900000) ". Is any malfunction in the CAN communication indicated in the results? YES: Check CAN communication line. Refer to «U1000 CAN COMM CIRCUIT»(ref-519782-S20406462222012122900000) . NO: GO TO 2.
2. CHECK OVERDRIVE CONTROL SWITCH CIRCUIT With CONSULT Turn ignition switch "ON". Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT. Read out "OD CONT SW". Check the signal of the overdrive control switch is indicated properly. Monitor item Condition Display value OD CONT SW Releasing overdrive control switch OFF Holding overdrive control switch ON Without CONSULT Turn ignition switch "ON". (Do not start engine) Check voltage between A/T control device connector terminal and ground. Item Connector Terminal Condition Data (Approx.) Overdrive control switch M156 7 - Ground Releasing overdrive control switch Battery voltage Holding overdrive control switch 0V OK or NG OK: GO TO 5 . NG: GO TO 3.
3. CHECK OVERDRIVE CONTROL SWITCH Turn ignition switch "OFF". Disconnect A/T control device connector. Check continuity between A/T control device connector terminals. Item Connector Terminal Condition Continuity Overdrive control switch M156 7 - 8 Releasing overdrive control switch No Holding overdrive control switch Yes OK or NG OK: GO TO 4. NG: Repair or replace overdrive control switch.
4. DETECT MALFUNCTIONING ITEM Check the following. If any items are damaged, repair or replace damaged parts. Harness for short or open between combination meter connector terminal 20 and A/T control device connector terminal 7. Harness for short or open between A/T control device connector terminal 8 and ground. OK or NG OK: GO TO 5. NG: Repair or replace damaged parts.
5. CHECK COMBINATION METER Check the combination meter. Refer to " «DIAGNOSIS DESCRIPTION»(ref-519803-S26839004882012122900000) ". OK or NG OK: INSPECTION END NO: Repair or replace damaged parts.

Scheme 414

Scheme 415

1. CHECK CAN COMMUNICATION LINE Perform the self-diagnosis. Refer to " «CONSULT FUNCTION (TRANSMISSION)»(ref-519782-S28236871182012122900000) ". Is any malfunction in the CAN communication indicated in the results? YES: Check CAN communication line. Refer to «U1000 CAN COMM CIRCUIT»(ref-519782-S20406462222012122900000) . NO: GO TO 2.
2. CHECK 1ST POSITION SWITCH CIRCUIT With CONSULT Turn ignition switch "ON". Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT. Read out "1 POSITION SW". Check the signal of the 1st position switch is indicated properly. Monitor item Condition Display value 1 POSITION SW When setting selector lever to "1" position. ON When setting selector lever to other positions. OFF Without CONSULT Turn ignition switch "ON". (Do not start engine) Check voltage between A/T shift selector connector terminal and ground. Item Connector Terminal Condition Data (Approx.) 1st position switch M156 9 - Ground When setting selector lever to "1" position. 0V When setting selector lever to other positions. Battery voltage OK or NG OK: GO TO 5 . NG: GO TO 3.
3. CHECK 1ST POSITION SWITCH Turn ignition switch "OFF". Disconnect A/T shift selector connector. Check continuity between A/T shift selector connector terminals. Item Connector Terminal Condition Continuity 1st position switch M156 9 - 10 When setting selector lever to "1" position. Yes When setting selector lever to other positions. No OK or NG OK: GO TO 4. NG: Repair or replace A/T shift selector assembly.
4. DETECT MALFUNCTIONING ITEM Check the following. If any items are damaged, repair or replace damaged parts. Harness for short or open between combination meter connector terminal 18 and A/T shift selector connector terminal 9. Harness for short or open between A/T shift selector connector terminal 10 and ground. OK or NG OK: GO TO 5. NG: Repair or replace damaged parts.
5. CHECK COMBINATION METER Check the combination meter. Refer to " «DIAGNOSIS DESCRIPTION»(ref-519803-S26839004882012122900000) ". OK or NG OK: INSPECTION END NO: Repair or replace damaged parts.

PHYSICAL VALUES

Data are reference value and are measured between each terminal and ground.

Terminal No. Wire color Item Condition Data (Approx.) 1 R/B Power supply (Memory back-up) Always Battery voltage 2 R/B Power supply (Memory back-up) Always Battery voltage 3 L CAN H - - 4 V K-line (CONSULT signal) The terminal is connected to the data link connector for CONSULT. - 5 B Ground Always 0 V 6 W/G Power supply - Battery voltage - 0 V 7 LG Back-up lamp relay Selector lever in "R" position. 0 V Selector lever in other positions. Battery voltage 8 P CAN L - - 9 R Starter relay Selector lever in "N", "P" positions. Battery voltage Selector lever in other positions. 0 V 10 B Ground Always 0 V

Fail-Safe

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 the normal shift pattern. Therefore, the customer's vehicle has returned to normal, so handle according to the "diagnostics flow" (Refer to " 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

1. Signals are input from two systems - from output speed sensor installed on the transmission and from combination 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

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

Throttle Position Sensor

1. 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 systems, 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

1. 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

1. The starter relay is switched "OFF". (Starter starting is disabled.)

Interlock

1. 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.
2. When interlock is detected at the 3GR or more, it is locked at the 2GR.

1st Engine Braking

1. 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

1. The solenoid is switched "OFF" and the line pressure is set to the maximum hydraulic pressure to make driving possible.

Torque Converter Clutch Solenoid

1. The solenoid is switched "OFF" to release the lock-up.

Low Coast Brake Solenoid

1. 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

1. 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

1. 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

1. 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

1. If a (electrical or functional) malfunction occurs with the solenoid either "ON" or "OFF", the transmission is held in 4GR to make driving possible.

Input Speed Sensor 1 or 2

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

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

Information necessary to service the system safely is included in the SRS AIRBAG and SEAT BELTS articles of this Service Information.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

Precaution Necessary for Steering Wheel Rotation After Battery Disconnect

Note. This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYSTEM). Remove and install all control units after disconnecting both battery cables with the ignition knob in the "LOCK" position. Always use CONSULT to perform self-diagnosis as a part of each function inspection after finishing work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results.

For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mechanism is adopted on the key cylinder.

For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and steering wheel rotation will become impossible.

If steering wheel rotation is required when battery power is interrupted, follow the procedure below before starting the repair operation.

Precaution for Work

1. When removing or disassembling each component, be careful not to damage or deform it. If a component may be subject to interference, be sure to protect it with a shop cloth.
2. When removing (disengaging) components with a screwdriver or similar tool, be sure to wrap the component with a shop cloth or vinyl tape to protect it.
3. Protect the removed parts with a shop cloth and prevent them from being dropped.
4. Replace a deformed or damaged clip.
5. If a part is specified as a non-reusable part, always replace it with new one.
6. Be sure to tighten bolts and nuts securely to the specified torque.
7. After installation is complete, be sure to check that each part works properly.
8. Follow the steps below to clean components.

1. Water soluble dirt: Dip a soft cloth into lukewarm water, and wring the water out of the cloth to wipe the dirty area. Then rub with a soft and dry cloth.
2. Oily dirt: Dip a soft cloth into lukewarm water with mild detergent (concentration: within 2 to 3%), and wipe the dirty area. Then dip a cloth into fresh water, and wring the water out of the cloth to wipe the detergent off. Then rub with a soft and dry cloth.

1. Do not use organic solvent such as thinner, benzene, alcohol, or gasoline.
2. For genuine leather seats, use a genuine leather seat cleaner.

ATF COOLER SERVICE

If A/T fluid contains frictional material (clutches, bands, etc.), or if an A/T is repaired, overhauled, or replaced, inspect and clean the A/T fluid cooler mounted in the radiator or replace the radiator. Flush cooler lines using cleaning solvent and compressed air after repair. For A/T fluid cooler cleaning procedure, refer to " A/T FLUID COOLER CLEANING ". For radiator replacement, refer to " REMOVAL AND INSTALLATION " (VQ40DE), " REMOVAL AND INSTALLATION " (VK56DE).

Special Service Tool

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Tool number (Kent-Moore No.) Tool name Description ST2505S001 (J-34301-C) Oil pressure gauge set ST25051001 (-) Oil pressure gauge ST25052000 (-) Hose ST25053000 (-) Joint pipe ST25054000 (-) Adapter ST25055000 (-) Adapter Measuring line pressure KV31103600 (J-45674) Joint pipe adapter (With ST25054000) Measuring line pressure ST33400001 (J-26082) Drift Installing rear oil seal (2WD models) Installing oil pump housing oil seal 60 mm (2.36 in) dia . 47 mm (1.85 in) dia . KV31102400 (J-34285 and J-34285-87) Clutch spring compressor Installing reverse brake return spring retainer 320 mm (12.60 in) 174 mm (6.85 in) ST25850000 (J-25721-A) Sliding hammer Remove oil pump assembly 179 mm (7.05 in) 70 mm (2.76 in) 40 mm (1.57 in) M12X1.75P - (J-47002) Transmission jack adapter kit - (J-47002-1) Center bracket - (J-47002-3) Adapter plate - (J-47002-4) Adapter block Assist in removal of transmission and transfer case as one assembly using only one transmission jack. - (J-46534) Trim tool set For removing trim

Scheme 416

Scheme 417

Scheme 418

Scheme 419

Commercial Service Tool

Tool name Description Power tool Loosening bolts and nuts Drift Installing manual shaft seals 22 mm (0.87 in) dia . Drift Installing rear oil seal (4WD models) 64 mm (2.52 in) dia . Pin punch Removing retaining pin Installing retaining pin 4 mm (0.16 in) dia

Scheme 420

Scheme 421

Check Before Engine Is Started

1. CHECK O/D OFF INDICATOR LAMP (WITHOUT MANUAL MODE) OR A/T CHECK INDICATOR LAMP (WITH MANUAL MODE) Park vehicle on level surface. Move shift selector to "P" position. Turn ignition switch to "OFF" position and wait at least 10 seconds. Turn ignition switch to "ON" position. (Do not start engine.) Does O/D OFF indicator lamp or A/T CHECK indicator lamp light up for about 2 seconds? YES >> Turn ignition switch "OFF". Perform self-diagnostics and record all NG items on the " «DIAGNOSTIC WORK SHEET»(ref-519782-S28627795542012122900000) ". Refer to " «CONSULT FUNCTION (TRANSMISSION)»(ref-519782-S28236871182012122900000) ", " «DIAGNOSIS PROCEDURE WITHOUT CONSULT»(ref-519782-S13568625532012122900000) ". Go to " «CHECK AT IDLE»(ref-519782-S29882897422012122900000) ". NO: Stop the test and go to " «SYMPTOM CHART»(ref-519782-S18689840432012122900000) ".

Check at Idle

1. CHECK STARTING THE ENGINE Park vehicle on level surface. Move shift selector to "P" or "N" position. Turn ignition switch to "OFF" position. Turn ignition switch to "START" position. Does the engine start? YES: GO TO 2. NO: Stop the road test and go to " «SYMPTOM CHART»(ref-519782-S18689840432012122900000) ".
2. CHECK VEHICLE EQUIPMENT Is vehicle equipped with manual mode shifter? YES or NO? YES: GO TO 3. NO: GO TO 4 .
3. CHECK STARTING THE ENGINE Turn ignition switch to "ON" position. Move shift selector in "D", "M" and "R" position. Turn ignition switch to "START" position. Does the engine start in either position? YES: Stop the road test and go to " «SYMPTOM CHART»(ref-519782-S18689840432012122900000) ". NO: GO TO 5 .
4. CHECK STARTING THE ENGINE Turn ignition switch to "ON" position. Move shift selector in "D", "3", "2", "1" or "R" position. Turn ignition switch to "START" position. Does the engine start in either position? YES: Stop the road test and go to " «SYMPTOM CHART»(ref-519782-S18689840432012122900000) ". NO: GO TO 5.
5. CHECK "P" POSITION FUNCTIONS Without manual mode Move shift selector to "P" position. Turn ignition switch to "OFF" position. Release the parking brake. Push the vehicle forward or backward. Engage the parking brake. When you push the vehicle with disengaging the parking brake, does it move? YES: Record the malfunction, GO TO 6. NO: GO TO 6.
6. CHECK "N" POSITION FUNCTIONS Start the engine. Move shift selector to "N" position. Release the parking brake. Does vehicle move forward or backward? YES: Record the malfunction, GO TO 7. NO: GO TO 7.
7. CHECK SHIFT SHOCK Engage the brake. Move shift selector to "D" position. When the transmission is shifted from "N" to "D", is there an excessive shock? YES: Record the malfunction, GO TO 8. NO: GO TO 8.
8. CHECK "R" POSITION FUNCTIONS Engage the brake. Move shift selector to "R" position. Release the brake for 4 to 5 seconds. Does the vehicle creep backward? YES: GO TO 9. NO: Record the malfunction, GO TO 9.
9. CHECK "D" POSITION FUNCTIONS Inspect whether the vehicle creep forward when the transmission is put into the "D" position. Does the vehicle creep forward in the "D" positions? YES: Go to " «CRUISE TEST - PART 1»(ref-519782-S13911853212012122900000) ". NO: Record the malfunction and go to " «CRUISE TEST - PART 1»(ref-519782-S13911853212012122900000) ".

VQ40DE MODELS FOR 2WD

At half throttle the accelerator is 1/2 of the full opening.

VQ40DE MODELS FOR 4WD

At half throttle the accelerator is 1/2 of the full opening.

VK56DE MODELS

At half throttle the accelerator is 1/2 of the full opening.

1. At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal: OFF)
2. At half throttle, the accelerator opening is 1/2 of the full opening.

1. At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal: OFF)
2. At half throttle, the accelerator opening is 1/2 of the full opening.

1. At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal: OFF)
2. At half throttle, the accelerator opening is 1/2 of the full opening.

Stall Speed

Line Pressure

Input Speed Sensor

Output Speed Sensor

Reverse brake

*: Always check with the Parts Department for the latest parts information.

Total End Play

BEARING RACE FOR ADJUSTING TOTAL END PLAY

*: Always check with the Parts Department for the latest parts information.