DTC P0734 A/T 4TH GEAR FUNCTION
TM-69
< COMPONENT DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
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WITH CONSULT-III
1. Start engine and select “DATA MONITOR” mode for “A/T” with CONSULT-III.
2. Touch “START”.
3. Make sure that output voltage of A/T fluid temperature sensor is within the range below.
FLUID TEMP SE: 0.4 - 1.5V
If out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to increase the
voltage (cool down the fluid).
4. Select “4TH GR FNCTN P0734” of “DTC WORK SUPPORT” mode for “A/T” with CONSULT-III and touch
“START”.
5. Accelerate vehicle to 55 to 65 km/h (34 to 40 MPH) under the following conditions and release the accel-
erator pedal completely.
THROTTLE POSI: Less than 5.5/8 (at all times during step 4)
SLCT LVR POSI: “D” position
-Make sure that “GEAR” shows “3” after releasing pedal.
6. Depress accelerator pedal steadily with 1.0/8 - 2.0/8 of “THROTTLE POSI” from a speed of 55 to 65 km/h
(34 to 40 MPH) until “TESTING” has turned to “STOP VEHICLE” or “COMPLETED”. (It will take approxi-
mately 3 seconds.)
If the check result NG appears on CONSULT-III screen, go to TM-69, "
Diagnosis Procedure".
If “STOP VEHICLE” appears on CONSULT-III screen, go to following step.
-Make sure that “GEAR” shows “4” when depressing accelerator pedal with 1.0/8 - 2.0/8 of
“THROTTLE POSI”.
-If “TESTING” does not appear on CONSULT-III for a long time, select “SELF-DIAG RESULTS” for
“A/T”. In case a DTC other than “P0734 A/T 4TH GR FNCTN” is shown, refer to TM-35, "
CONSULT-
III Function (TRANSMISSION)".
7. Stop vehicle.
8. Follow the instruction displayed. (Check for normal shifting referring to the table below.)
9. Make sure that “OK” is displayed. (If “NG” is displayed, refer to “Diagnostic Procedure”.)
Refer to TM-69, "
Diagnosis Procedure".
Refer to TM-319, "
Vehicle Speed at Which Gear Shifting Occurs".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID:0000000001694333
1.CHECK SHIFT-UP (D3 TO D4)
During TM-183, "
Cruise Test - Part 1".
Does A/T shift from D
3 to D4 at the specified speed?
YES >> GO TO 11.
NO >> GO TO 2.
2.CHECK LINE PRESSURE
Perform line pressure test. Refer to TM-178, "
Inspection and Judgment".
OK or NG
OK >> GO TO 3.
NG >> GO TO 7.
Vehicle condition Gear on actual transmission shift pattern when screen is changed to 1 → 2 → 3 → 4
No malfunction exists 1 → 2 → 3 → 4
Malfunction for “A/T 4TH GR FNCTN” exists.2 → 2 → 3 → 3
1 → 2 → 2 → 1
SCIA7190E
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
TM-77
< COMPONENT DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
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5. Accelerate vehicle to more than 80 km/h (50 MPH) and maintain the following conditions continuously
until “TESTING” has turned to “COMPLETE”. (It will take approximately 30 seconds after “TESTING”
shows.)
THROTTLE POSI: 1.0/8 - 2.0/8 (at all times during step 4)
SLCT LVR POSI: “D” position
TCC S/V DUTY: More than 94%
VEHICLE SPEED: Constant speed of more than 80 km/h (50 MPH)
-Make sure that “GEAR” shows “4”.
-For shift schedule, refer to TM-319, "
Vehicle Speed at Which Gear Shifting Occurs".
-If “TESTING” does not appear on CONSULT-III for a long time, select “SELF-DIAG RESULTS”. In
case a DTC other than “P0744 A/T TCC S/V FNCTN” is shown, refer to TM-35, "
CONSULT-III Func-
tion (TRANSMISSION)".
6. Make sure that “OK” is displayed. (If “NG” is displayed, refer to “DIAGNOSTIC PROCEDURE”.)
Refer to TM-77, "
Diagnosis Procedure".
Refer to TM-319, "
Vehicle Speed at When Lock-up Occurs/Releases".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID:0000000001694347
1.CHECK SHIFT-UP (D3 TO D4)
During TM-183, "
Cruise Test - Part 1".
Does A/T shift from D
3 to D4 at the specified speed?
YES >> GO TO 11.
NO >> GO TO 2.
2.CHECK LINE PRESSURE
Perform line pressure test. Refer to TM-178, "
Inspection and Judgment".
OK or NG
OK >> GO TO 3.
NG >> GO TO 6.
3.CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to TM-243, "
Control Valve Assembly".
2. Check to ensure that:
- Valve, sleeve and plug slide along valve bore under their own weight.
- Valve, sleeve and plug are free from burrs, dents and scratches.
- Control valve springs are free from damage, deformation and fatigue.
- Hydraulic line is free from obstacles.
OK or NG
OK >> GO TO 4.
NG >> Repair control valve.
4.CHECK SHIFT-UP (D3 TO D4)
SCIA7190E
PNP, OD SWITCH AND CLOSED THROTTLE, WIDE OPEN THROTTLE POSI-
TION SIGNAL CIRCUIT
TM-111
< COMPONENT DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
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PNP, OD SWITCH AND CLOSED THROTTLE, WIDE OPEN THROTTLE PO-
SITION SIGNAL CIRCUIT
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001694273
Remarks: Specification data are reference values.
TCM Terminal and Reference ValueINFOID:0000000001694274
TCM terminal data are reference values, measured between each terminal and ground.
Diagnosis ProcedureINFOID:0000000001694275
1.CHECK CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to TM-35, "
CONSULT-III Function (TRANSMISSION)".
Is a malfunction in the CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to TM-43.
NO (With CONSULT-III) >>GO TO 2.
NO (Without CONSULT-III) >>GO TO 3.
Item name Condition Display value
PN POSI SWWhen setting selector lever to “N” or “P” position. ON
When setting selector lever to other positions. OFF
R POSITION SWWhen setting selector lever to “R” position. ON
When setting selector lever to other positions. OFF
D POSITION SWWhen setting selector lever to “D” position. ON
When setting selector lever to other positions. OFF
2 POSITION SWWhen setting selector lever to “2” position. ON
When setting selector lever to other positions. OFF
1 POSITION SWWhen setting selector lever to “1” position. ON
When setting selector lever to other positions. OFF
OVERDRIVE SWWhen overdrive control switch is depressed. ON
When overdrive control switch is released. OFF
CLOSED THL/SWReleased accelerator pedal. ON
Depressed accelerator pedal. OFF
W/O THRL/P-SWFully depressed accelerator pedal. ON
Released accelerator pedal. OFF
Terminal Wire color Item ConditionJudgement standard
(Approx.)
26 YPNP switch “1” posi-
tion
andWhen setting selector lever to “1” position. Battery voltage
When setting selector lever to other positions. 0V
27 GPNP switch “2” posi-
tionWhen setting selector lever to “2” position. Battery voltage
When setting selector lever to other positions. 0V
34 LGPNP switch “D” posi-
tionWhen setting selector lever to “D” position. Battery voltage
When setting selector lever to other positions. 0V
35 SBPNP switch “R” posi-
tionWhen setting selector lever to “R” position. Battery voltage
When setting selector lever to other positions. 0V
36 RPNP switch “N” or “P”
positionWhen setting selector lever to “N” or “P” posi-
tions.Battery voltage
When setting selector lever to other positions. 0V
TM-138
< SYMPTOM DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
SYSTEM SYMPTOM
OD OFF Indicator Lamp Does Not Come On
INFOID:0000000001696242
SYMPTOM:
OD OFF indicator lamp does not come on for about 2 seconds when turning ignition switch to ON.
1.CHECK CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to TM-35, "
CONSULT-III Function (TRANSMISSION)" or TM-350, "Diagnosis
Procedure without CONSULT-III".
Is a malfunction in CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to TM-43, "Description" (type 1) or TM-391, "Description"
(type 2).
NO >> GO TO 2.
2.CHECK TCM POWER SOURCE
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between TCM connector terminals and ground.
OthersTransaxle overheats.ON vehicle1. A/T fluid levelTM-171
2. Engine idling speedEC-26
3. Accelerator pedal position sensorEC-297
4. Line pressure testTM-178
5. Line pressure solenoid valveTM-81
6. Control valve assemblyTM-191
OFF vehicle7. Oil pumpTM-240
8. Reverse clutchTM-258
9. High clutchTM-262
10. Brake bandTM-287
11. Forward clutchTM-267
12. Overrun clutchTM-267
13. Low & reverse brakeTM-273
14. Torque converterTM-222
ATF shoots out during
operation.
White smoke emitted
from exhaust pipe
during operation.ON vehicle 1. A/T fluid levelTM-171
OFF vehicle2. Reverse clutchTM-258
3. High clutchTM-262
4. Brake bandTM-287
5. Forward clutchTM-267
6. Overrun clutchTM-267
7. Low & reverse brakeTM-273
Unusual smell at A/T
fluid charging pipe.ON vehicle 1. A/T fluid levelTM-171
OFF vehicle2. Torque converterTM-222
3. Oil pumpTM-240
4. Reverse clutchTM-258
5. High clutchTM-262
6. Brake bandTM-287
7. Forward clutchTM-267
8. Overrun clutchTM-267
9. Low & reverse brakeTM-273
Items Symptom Condition Diagnostic item Reference page
TM-140
< SYMPTOM DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
SYSTEM SYMPTOM
Check again. Refer to TM-180, "Check Before Engine Is Started".
OK or NG
OK >>INSPECTION END
NG >> GO TO 7.
7.CHECK TCM
1. Check TCM input/output. Refer to TM-119, "
Reference Value" (Type 1) or TM-422, "Reference Value"
(Type 2).
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Engine Cannot Be Started in "P" and "N" PositionINFOID:0000000001696243
SYMPTOM:
Engine cannot be started with selector lever in “P” or “N” position.
Engine can be started with selector lever in “D”, “2”, “1” or “R” position.
1.CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis. Refer to TM-35, "
CONSULT-III Function (TRANSMISSION)" or TM-38, "Diagnosis
Procedure without CONSULT-III".
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to TM-35, "CONSULT-III Function (TRANSMISSION)" or
TM-38, "
Diagnosis Procedure without CONSULT-III".
NO >> GO TO 2.
2.CHECK PNP SWITCH
Check continuity between PNP switch harness connector terminals.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.CHECK CONTROL CABLE ADJUSTMENT
Check PNP switch again with control cable disconnected from manual shaft of A/T assembly. Refer to test
group 2.
OK or NG
OK >> Adjust control cable. Refer to TM-204, "Adjustment of A/T Position".
NG >> 1. Check PNP switch (Refer to test group 2.) again after adjusting PNP switch (Refer to TM-46
).
- If OK, INSPECTION END
- If NG, repair or replace PNP switch. Refer to TM-195, "
Park/Neutral Position (PNP) Switch".
4.CHECK STARTING SYSTEM
Check starting system. Refer to STR-6, "
System Description".
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
In "P" Position, Vehicle Moves Forward or Backward When PushedINFOID:0000000001696244
SYMPTOM:
Vehicle moves when it is pushed forward or backward with selector lever in “P” position.
Selector lever position Connector terminal Continuity
“P”, “N”
F25 1 - 2Ye s
Other positions No
SCIA5606E
TM-142
< SYMPTOM DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
SYSTEM SYMPTOM
NG >> GO TO 6.
6.CHECK TCM
1. Check TCM input/output signals. Refer to TM-22, "
Input/Output Signal of TCM".
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Large Shock "N" → "R" PositionINFOID:0000000001696246
SYMPTOM:
There is a large shock when changing from “N” to “R” position.
1.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to TM-35, "
CONSULT-III Function (TRANSMISSION)" or TM-38, "Diagnosis
Procedure without CONSULT-III".
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to TM-38, "Diagnosis Procedure without CONSULT-III".
NO >> GO TO 2.
2.CHECK LINE PRESSURE
Check line pressure at idle with selector lever in “D” position. Refer to TM-178, "
Inspection and Judgment".
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to TM-191, "
Control Valve Assembly and Accumulators".
2. Check the following items:
- Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot fil-
ter)
- Line pressure solenoid valve
- Oil pump assembly. Refer to TM-240, "
Oil Pump".
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK SYMPTOM
Check again. Refer to TM-181, "
Check at Idle".
OK or NG
OK >>INSPECTION END
NG >> GO TO 5.
5.CHECK TCM
1. Check TCM input/output signals. Refer to TM-22, "
Input/Output Signal of TCM".
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Vehicle Does Not Creep Backward in "R" PositionINFOID:0000000001696247
SYMPTOM:
Vehicle does not creep backward when selecting “R” position.
1.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to TM-171, "
Checking A/T Fluid".
OK or NG
TM-172
< ON-VEHICLE MAINTENANCE >[TYPE 1 (4AT: RE4F03B)]
A/T FLUID
5. Refill the transaxle with new specified A/T fluid through the A/T fluid charging pipe. Always refill the tran-
saxle with the same volume of A/T fluid that was drained out.
6. Run engine at idle speed for 5 minutes.
7. Check A/T fluid level and condition. Refer to TM-171, "
Checking A/T Fluid".
A/T Fluid Cooler CleaningINFOID:0000000001731916
Whenever the A/T is repaired, overhauled, or replaced, the A/T fluid cooler mounted in the radiator must be
inspected and cleaned.
Metal debris and friction material, if present, can become trapped in the A/T fluid cooler. This debris can con-
taminate the newly serviced A/T or, in severe cases, can block or restrict the flow of A/T fluid. In either case,
malfunction of the newly serviced A/T may result.
Debris, if present, may build up as A/T fluid enters the cooler inlet. It will be necessary to back flush the cooler
through the cooler outlet in order to flush out any built up debris.
A/T FLUID COOLER CLEANING PROCEDURE
1. Identify the A/T inlet and outlet fluid cooler hoses.
2. Position an oil pan under the A/T inlet and outlet fluid cooler
hoses.
3. Disconnect the A/T fluid cooler inlet and outlet rubber hoses
from the steel cooler tubes or bypass valve.
NOTE:
Replace the cooler hoses if rubber material from the hose
remains on the tube fitting.
4. Allow any A/T fluid that remains in the cooler hoses to drain into
the oil pan.
5. Insert the extension adapter hose of a can of Transmission
Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-
let hose.
CAUTION:
Wear safety glasses and rubber gloves when spraying the
Transmission Cooler Cleaner.
Spray Transmission Cooler Cleaner only with adequate
ventilation.
Avoid contact with eyes and skin.
Do not breath vapors or spray mist.
6. Hold the hose and can as high as possible and spray Transmis-
sion Cooler Cleaner in a continuous stream into the cooler outlet
hose until A/T fluid flows out of the cooler inlet hose for 5 seconds.
7. Insert the tip of an air gun into the end of the cooler outlet hose.
8. Wrap a shop rag around the air gun tip and end of cooler outlet
hose.
9. Blow compressed air regulated to 5 - 9 kg/cm
2 (70 - 130 psi) through the cooler outlet hose for 10 seconds
to force out any remaining A/T fluid.
10. Repeat steps 5 through 9 three additional times.Fluid grade and capacity: Refer to MA-19, "
Fluids and Lubricants".
SCIA5628E
SCIA5629E
SCIA5630E
A/T FLUID
TM-173
< ON-VEHICLE MAINTENANCE >[TYPE 1 (4AT: RE4F03B)]
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11. Position an oil pan under the banjo bolts that connect the A/T fluid cooler steel lines to the A/T.
12. Remove the banjo bolts.
13. Flush each steel line from the cooler side back toward the A/T by spraying Transmission Cooler Cleaner
in a continuous stream for 5 seconds.
14. Blow compressed air regulated to 5 - 9 kg/cm
2 (70 - 130 psi) through each steel line from the cooler side
back toward the A/T for 10 seconds to force out any remaining A/T fluid.
15. Ensure all debris is removed from the steel cooler lines.
16. Ensure all debris is removed from the banjo bolts and fittings.
17. Perform "A/T FLUID COOLER DIAGNOSIS PROCEDURE".
A/T FLUID COOLER DIAGNOSIS PROCEDURE
NOTE:
Insufficient cleaning of the cooler inlet hose exterior may lead to inaccurate debris identification.
1. Position an oil pan under the A/T inlet and outlet cooler hoses.
2. Clean the exterior and tip of the cooler inlet hose.
3. Insert the extension adapter hose of a can of Transmission
Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-
let hose.
CAUTION:
Wear safety glasses and rubber gloves when spraying the
Transmission Cooler Cleaner.
Spray Transmission Cooler Cleaner only with adequate
ventilation.
Avoid contact with eyes and skin.
Do not breath vapors or spray mist.
4. Hold the hose and can as high as possible and spray Transmis-
sion Cooler Cleaner in a continuous stream into the cooler outlet
hose until A/T fluid flows out of the cooler inlet hose for 5 seconds.
5. Tie a common white, basket-type coffee filter to the end of the
cooler inlet hose.
6. Insert the tip of an air gun into the end of the cooler outlet hose.
7. Wrap a shop rag around the air gun tip and end of cooler outlet
hose.
8. Blow compressed air regulated to 5 - 9 kg/cm
2 (70 - 130 psi)
through the cooler outlet hose to force any remaining A/T fluid
into the coffee filter.
9. Remove the coffee filter from the end of the cooler inlet hose.
10. Perform "A/T FLUID COOLER INSPECTION PROCEDURE".
A/T FLUID COOLER INSPECTION PROCEDURE
SCIA5629E
SCIA5631E
SCIA5632E