lock NISSAN VERSA 2006 Workshop Service Service Manual

DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
AT-139
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Revision: June 20062007 Versa
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)PFP:31940
DescriptionUCS005P1

This malfunction will not be detected while the OD OFF indicator lamp is indicating another self-diagnosis
malfunction.

This malfunction is detected when the A/T does not shift into fourth gear position or the torque converter
clutch does not lock-up as instructed by the TCM. This is not caused by electrical malfunction (circuits
open or shorted) but by mechanical malfunction such as control valve sticking, improper solenoid valve
operation, malfunctioning oil pump or torque converter clutch, etc.
CONSULT-II Reference ValueUCS005P2
Remarks: Specification data are reference values.
On Board Diagnosis LogicUCS005P3

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0744 A/T TCC S/V FNCTN” with CONSULT-II is detected when A/T cannot per-
form lock-up even if electrical circuit is good.

This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by TCM
as follows:
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from ECM
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is much lower than the position (4th) supposed by TCM, the slip ratio will be
much less than normal. In case the ratio does not reach the specified value, TCM judges this diagnosis
malfunction.
This malfunction will be caused when shift solenoid valve B is stuck closed.

Gear positions supposed by TCM are as follows.
In case of gear position with no malfunctions: 1, 2, 3 and 4 positions
In case of gear position with shift solenoid valve B stuck closed: 1, 2, 2 and 1* positions to each gear posi-
tion above
*: “P0744 A/T TCC S/V FNCTN” is detected.
Possible CauseUCS005P4

Line pressure solenoid valve

Torque converter clutch solenoid valve

Each clutch

Hydraulic control circuit
Item name Condition Display value (Approx)
TCC S/V DUTY Lock-up OFF ⇔ Lock-up ON 4% ⇔ 94%

AT-140
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
Revision: June 20062007 Versa
DTC Confirmation ProcedureUCS005P5
CAUTION:

Always drive vehicle at a safe speed.

If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait
at least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Start engine and select “DATA MONITOR” mode for “A/T” with
CONSULT-II.
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 - 1.5 V
If out of range, drive vehicle to decrease voltage (warm up the
fluid) or stop engine to increase voltage (cool down the fluid).
4. Select “TCC S/V FNCTN P0744” of “DTC WORK SUPPORT”
mode for “A/T” with CONSULT-II and touch “START”.
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 approxi-
mately 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 AT- 6 7 , "Vehicle Speed at Which Gear Shifting Occurs" .
–If “TESTING” does not appear on CONSULT-II 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 AT-82, "
Display Items List" .
6. Make sure that “OK” is displayed. (If “NG” is displayed, refer to “DIAGNOSTIC PROCEDURE”.)
Refer to AT-141, "
Diagnostic Procedure" .
Refer to AT-67, "
Vehicle Speed at Which Lock-up Occurs/Releases" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
BCIA0031E

DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
AT-141
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Diagnostic ProcedureUCS005P6
1. CHECK SHIFT-UP (D3 TO D4 )
During AT-61, "
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 AT-56, "
LINE PRESSURE TEST" .
OK or NG
OK >> GO TO 3.
NG >> GO TO 6.
3. CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT-293, "
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 )
During AT-61, "
Cruise Test — Part 1" .
Does A/T shift from D
3 to D4 at the specified speed?
YES >> GO TO 5.
NO >> Check control valve again. Repair or replace control
valve assembly.
5. CHECK DTC
Perform AT-140, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 11. Check for proper lock-up.
SCIA7190E
SCIA7190E

AT-142
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
Revision: June 20062007 Versa
6. CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT-242, "
Control Valve Assembly and Accumulators" .
–Line pressure solenoid valve
2. Check resistance between terminal cord assembly harness con-
nector terminal and ground. Refer to AT-146, "
Wiring Diagram
— AT — LPSV" .
OK or NG
OK >> GO TO 7.
NG >> Replace solenoid valve assembly.
7. CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT-242, "
Control Valve Assembly and Accumulators" .
–Line pressure solenoid valve
2. Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground. Refer to AT-
146, "Wiring Diagram — AT — LPSV" .
OK or NG
OK >> GO TO 8.
NG >> Replace solenoid valve assembly.
8. CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT-293, "
Control Valve Assembly" .
2. Check line pressure circuit valves for sticking.
–Pressure regulator valve
–Pilot valve
–Pressure modifier valve
OK or NG
OK >> GO TO 9.
NG >> Repair control valve.
9. CHECK SHIFT-UP (D3 TO D4 )
During AT- 6 1 , "
Cruise Test — Part 1" .
Does A/T shift from D
3 to D4 at the specified speed?
YES >> GO TO 10.
NO >> Check control valve again. Repair or replace control
valve assembly.
Solenoid valve Connectror Terminal Resistance (Approx.)
Line pressure solenoid
valveF30 4 - Ground 2.5 - 5 Ω
SCIA3457E
SCIA3275E
SCIA7190E

DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
AT-143
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Revision: June 20062007 Versa
10. CHECK DTC
Perform AT-140, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 11. Check for proper lock-up.
11 . CHECK LOCK-UP
During AT-61, "
Cruise Test — Part 1" .
A/T perform lock-up at the specified speed?
YES >> Perform “Cruise test — Part 1” again and return to the
start point of this test group.
NO >> GO TO 12.
12. CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT-242, "
Control Valve Assembly and Accumulators" .
–Torque converter clutch solenoid valve
2. Check resistance between terminal cord assembly harness con-
nector terminal and ground. Refer to AT-135, "
Wiring Diagram
— AT — TCV" .
OK or NG
OK >> GO TO 13.
NG >> Replace solenoid valve assembly.
13. CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT-242, "
Control Valve Assembly and Accumulators" .
–Torque converter clutch solenoid valve
2. Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground. Refer to AT-
135, "Wiring Diagram — AT — TCV" .
OK or NG
OK >> GO TO 14.
NG >> Replace solenoid valve assembly.
SCIA7191E
Solenoid valve Connectror Terminal Resistance (Approx.)
Torque converter clutch
solenoid valveF30 5 - Ground 5 - 20 Ω
SCIA2063E
SCIA2066E

AT-144
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
Revision: June 20062007 Versa
14. CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT-293, "
Control Valve Assembly" .
2. Check control valves for sticking.
–Torque converter clutch control valve
–Torque converter clutch relief valve
OK or NG
OK >> GO TO 15.
NG >> Repair control valve.
15. CHECK LOCK-UP
During AT- 6 1 , "
Cruise Test — Part 1" .
A/T perform lock-up at the specified speed?
YES >> GO TO 16.
NO >> Check control valve again. Repair or replace control
valve assembly.
16. CHECK DTC
Perform AT-140, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> Perform “Cruise test — Part 1” again and return to the start point of this test group.
SCIA7191E

DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
AT-173
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2. DETECT MALFUNCTIONING ITEM
Check the following items:

Harness for short or open between ignition switch and TCM terminals 10, 19

Harness for short or open between battery and TCM terminal 28

10A fuse (No.13, located in the fuse block) and 10A fuse (No.49, located in the IPDM E/R)

Ignition switch. Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
3. CHECK INPUT SIGNAL OF A/T FLUID TEMPERATURE SENSOR
With CONSULT-II
1. Start engine.
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Read out the value of “FLUID TEMP SE”.
Without CONSULT-II
1. Start engine.
2. Check voltage TCM connector terminals while warming up A/T.
OK or NG
OK >> GO TO 9.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING ITEM
Check the following items:

Harness for short or open between TCM, ECM and terminal cord assembly

Ground circuit for ECM
Refer to EC-144, "
POWER SUPPLY AND GROUND CIRCUIT" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
Item name Condition Display value
FLUID TEMP
SEWhen A/T fluid temperature is 20°C (68°F). 1.5 V
When A/T fluid temperature is 80°C
(176°F).0.5 V
LCIA0090E
Item Connec-
torTerminal ConditionJudge-
ment stan-
dard
(Approx.)
A/T fluid
temperature
sensor E32 47 - 42When A/T fluid tempera-
ture is 20°C (68°F).1.5 V
When A/T fluid tempera-
ture is 80°C (176°F).0.5 V
SCIA2658E

AT-176
DTC TURBINE REVOLUTION SENSOR
Revision: June 20062007 Versa
DTC TURBINE REVOLUTION SENSORPFP:31935
DescriptionUCS005QO
The turbine revolution sensor (power train revolution sensor) detects forward clutch drum rpm (revolutions per
minute). It is located on the input side of the automatic transaxle. The vehicle speed sensor A/T (Revolution
sensor) is located on the output side of the automatic transaxle. With the two sensors, input and output rpms
are accurately detected. As a result, optimal shift timing during deceleration and shift quality can be improved.
CONSULT-II Reference ValueUCS005QP
Remarks: Specification data are reference values.
On Board Diagnosis LogicUCS005QQ

This is not an OBD-II self-diagnostic item.

Diagnostic trouble code “TURBINE SENSOR” with CONSULT-II or 10th judgement flicker without CON-
SULT-II is detected when TCM does not receive the proper voltage signal from the sensor.
Possible CauseUCS005QR

Harness or connector
(The sensor circuit is open or shorted.)

Turbine revolution sensor (power train revolution sensor)
DTC Confirmation ProcedureUCS005QS
CAUTION:

Always drive vehicle at a safe speed.

Be careful not to rev engine into the red zone on the tachometer.

If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait
at least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Touch “START”.
4. Drive vehicle under the following conditions for more than 5 sec-
onds.
SLCT LVR POSI: “D” position
VEHICLE SPEED: Higher than 40 km/h (25 MPH)
ENGINE SPEED: Higher than 1,500 rpm
THROTTLE POSI: Greater than 1.0/8 of the full throttle posi-
tion
5. If the check result is NG, go to AT-178, "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Start engine.
2. Drive vehicle under the following conditions for more than 5 seconds.
Selector lever position: “D” position
Vehicle speed: Higher than 40 km/h (25 MPH)
Engine speed: Higher than 1,500 rpm
Throttle position: 1.0/8 of the full throttle position
3. Perform self-diagnosis. Refer to AT-90, "
Diagnostic Procedure Without CONSULT-II" .
4. If the check result is NG, go to AT-178, "
Diagnostic Procedure" .
Item name Condition Display value
TURBINE REV During driving (lock-up ON) Approximately matches the engine speed.
BCIA0031E

AT-178
DTC TURBINE REVOLUTION SENSOR
Revision: June 20062007 Versa
TCM terminal data are reference values, measured between each terminal and ground.
Diagnostic ProcedureUCS005QU
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Start engine.
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Read out the value of “TURBINE REV” while driving. Check the
value changes according to driving speed.
OK or NG
OK >> GO TO 8.
NG >> GO TO 2.
2. CHECK TURBINE REVOLUTION SENSOR (POWER TRAIN REVOLUTION SENSOR)
With CONSULT-II
1. Start engine.
2. Check power supply to turbine revolution sensor (power train revolution sensor) by voltage between TCM
connector terminals. Refer to AT- 1 8 3 , "
Wiring Diagram — AT — MAIN" and AT-177, "Wiring Diagram —
AT — PT/SEN" .
3. If OK, check the pulse when vehicle cruises.
OK or NG
OK >> GO TO 8.
NG >> GO TO 3.
Terminal Wire color Item ConditionJudgement standard
(Approx.)
38 GTurbine revolution sen-
sor (power train revolu-
tion sensor)When driving at 20 km/h (12 MPH). 360 Hz
42 B Sensor ground Always 0 V
Item name Condition Display value
TURBINE REV During driving (lock-up
ON)Approximately matches
the engine speed.
SCIA4730E
Item Connector TerminalJudgement stan-
dard (Approx.)
TCM E31, E3210 - 42
Battery voltage
19 - 42
Name Condition
Turbine revolution
sensor (power train
revolution sensor)When driving at 20 km/h (12 MPH), use the CONSULT-II
pulse frequency measuring function.*1
CAUTION:
Connect the diagnosis data link cable to the vehicle
diagnosis connector.
*1: A circuit tester cannot be used to test this item.
Item Connector Terminal Name Judgement
standard
(Approx.)
TCM E32 38Turbine revolution sensor
(power train revolution sensor)360 Hz
SCIA2769E

AT-184
MAIN POWER SUPPLY AND GROUND CIRCUIT
Revision: June 20062007 Versa
TCM terminal data are reference values, measured between each terminal and ground.
Diagnostic ProcedureUCS005R5
1. CHECK TCM POWER SOURCE
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between TCM connector terminals and ground.
3. Turn ignition switch OFF.
4. Check voltage between TCM connector terminals and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. DETECT MALFUNCTIONING ITEM
Check the following items:

Harness for short or open between ignition switch and TCM terminals 10, 19

Harness for short or open between battery and TCM terminal 28

10A fuse (No.13, located in the fuse block) and 10A fuse (No.49, located in the IPDM E/R)

Ignition switch. Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
Terminal Wire color Item ConditionJudgement stan-
dard
(Approx.)
10 R Power supply
or When turning ignition switch to “ON”. Battery voltage
When turning ignition switch to “OFF”. 0 V
19 R Power supplyWhen turning ignition switch to “ON”. Battery voltage
When turning ignition switch to “OFF”. 0 V
25 B Ground Always 0 V
28 GRPower supply
(memory back-up)Always Battery voltage
48 B Ground Always 0 V
ItemConnec-
torTerminal Judgement standard (Approx.)
Power supply E3110 Battery voltage
19 Battery voltage
Power supply
(memory back-up)E32 28 Battery voltage
SCIA2656E
ItemConnec-
torTerminal Judgement standard (Approx.)
Power supply E3110 0 V
19 0 V
Power supply
(memory back-up)E32 28 Battery voltage
SCIA2657E