2009 NISSAN LATIO ignition

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DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
Description INFOID:0000000004305397
• 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 shif t 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 c ontrol valve sticking, improper solenoid valve operation,
malfunctioning oil pump or torque converter clutch, etc.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004305398
Remarks: Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004305399
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0744 A/T TCC S/V FNCTN” wi th CONSULT-III is detected when A/T cannot per-
form lock-up even if electrical circuit is good.
• This diagnosis monitors actual gear position by checki ng 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 pos ition (4th) supposed by TCM, the slip ratio will be much
less than normal. In case the ratio does not reach t he specified value, TCM judges this diagnosis malfunc-
tion.
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 stu ck closed: 1, 2, 2 and 1* positions to each gear position
above
*: “P0744 A/T TCC S/V FNCTN” is detected.
Possible Cause INFOID:0000000004305400
• Line pressure solenoid valve
• Torque converter clutch solenoid valve
• Each clutch
• Hydraulic control circuit
DTC Confirmation Procedure INFOID:0000000004305401
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-III
1. Start engine and select “DATA MONITOR” m ode for “TRANSMISSION” 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 - 1.5 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 & SR T CONFIRMATION” mode for “TRANSMISSION” with
CONSULT-III and touch “START”.
Item name Condition Display value (Approx)
TCC S/V DUTY Lock-up OFF ⇔ Lock-up ON 4% ⇔ 94%

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DTC P0750 SHIFT SOLENOID VALVE A
Description INFOID:0000000004305411
Shift solenoid valves A and B are turned ON or OFF by the TCM in response to signals sent from the PNP
switch, vehicle speed and ECM (throttle opening). G ears will then be shifted to the optimum position.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004305412
On Board Diagnosis Logic INFOID:0000000004305413
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0750 SHIFT SOLENOID/V A” with CONSULT-III or 4th judgement flicker without
CONSULT-III is detected when TCM detects an improper voltage drop when it tries to operate the solenoid
valve.
Possible Cause INFOID:0000000004305414
• Harness or connector (The solenoid circuit is open or shorted.)
• Shift solenoid valve A
DTC Confirmation Procedure INFOID:0000000004305415
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-III
1. Turn ignition switch ON and select “DATA MO NITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Touch “START”.
3. Start engine.
4. Drive vehicle in “D” position and allow the transaxle to shift 1 → 2 (“GEAR”).
5. If the check result is NG, go to AT-141, " Diagnosis Procedure " .
WITH GST
Follow the procedure “WITH CONSULT-III”.
WITHOUT CONSULT-III
1. Start engine.
2. Drive vehicle in D 1→ D 2 position.
3. Perform self-diagnosis. Refer to AT-83, " Diagnosis Procedure without CONSULT-III " .
4. If the check result is NG, go to AT-141, " Diagnosis Procedure " .
Gear position 1 2 3 4
Shift solenoid valve A ON (Closed) OFF (Open) OFF (Open) ON (Closed)
Shift solenoid valve B ON (Closed) ON (Closed) OFF (Open) OFF (Open) Item name Condition Display value
SHIFT S/V A When shift solenoid valve A operates.
(When driving in “D 1 ” or “D 4 ”.) ON
When shift solenoid valve A does not operate.
(When driving in “D 2 ” or “D 3 ”.) OFF

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DTC P1760 OVERRUN CLUTCH SOLENOID VALVE
Description INFOID:0000000004305427
The overrun clutch solenoid valve is activated by the TCM in response to signals sent from the PNP switch,
overdrive control switch, vehicle speed and ECM (throt tle opening). The overrun clutch operation will then be
controlled.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004305428
On Board Diagnosis Logic INFOID:0000000004305429
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1760 OVERRUN CLUTCH S/V” wit h CONSULT-III or 6th judgement flicker with-
out CONSULT-III is detected when TCM detects an im proper voltage drop when it tries to operate solenoid
valve.
Possible Cause INFOID:0000000004305430
• Harness or connector (The solenoid circuit is open or shorted.)
• Overrun clutch solenoid valve
DTC Confirmation Procedure INFOID:0000000004305431
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-III
1. Turn ignition switch ON and select “DATA MO NITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Touch “START”.
3. Start engine.
4. Accelerate vehicle to a speed of more than 10 km/h (6 MPH) with “D” position (OD ON).
5. Release accelerator pedal completely with “D” position (OD OFF).
6. If the check result is NG, go to AT-151, " Diagnosis Procedure " .
WITH GST
Follow the procedure “WITH CONSULT-III”.
WITHOUT CONSULT-III
1. Start engine.
2. Drive vehicle under the following conditions: Selector lever position: “D” position (OD ON)
Vehicle speed: Higher than 10 km/h (6 MPH)
3. Perform self-diagnosis. Refer to AT-83, " Diagnosis Procedure without CONSULT-III " .
4. If the check result is NG, go to AT-151, " Diagnosis Procedure " .
Item name Condition Display value
OVERRUN/C S/V When overrun clutch solenoid valve operates. (When
overrun clutch disengaged. Refer to AT-22 .)
ON
When overrun clutch solenoid valve does not operate.
(When overrun clutch engaged. Refer to AT-22 .)
OFF

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DTC BATT/FLUID TEMP SEN (A/T FL
UID TEMP SENSOR CIRCUIT AND
TCM POWER SOURCE)
Description INFOID:0000000004305442
The A/T fluid temperature sensor detects the A/ T fluid temperature and sends a signal to the TCM.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004305443
Remarks: Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004305444
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “BATT/FLUID TEMP SEN” with CONSULT-III or 8th judgement flicker without CON-
SULT-III is detected when TCM receives an exce ssively low or high voltage from the sensor.
Possible Cause INFOID:0000000004305445
• Harness or connector (The sensor circuit is open or shorted.)
• A/T fluid temperature sensor
DTC Confirmation Procedure INFOID:0000000004305446
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-III
1. Start engine.
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Touch “START”.
4. Drive vehicle under the following conditions. SLCT LVR POSI: “D” position
VEHICLE SPEED: Higher than 20 km/h (12 MPH)
5. If the check result is NG, go to AT-159, " Diagnosis Procedure " .
WITHOUT CONSULT-III
1. Start engine.
2. Drive vehicle under the following conditions. Selector lever position: D position
Vehicle speed: higher than 20 km/h (12 MPH)
3. Perform self-diagnosis. Refer to AT-83, " Diagnosis Procedure without CONSULT-III " .
4. If the check result is NG, go to AT-159, " Diagnosis Procedure " .
Item name Condition Display value
FLUID TEMP SE When 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

AT-160< SERVICE INFORMATION >
DTC BATT/FLUID TEMP SEN (A/T FLU
ID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
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-121, " Wiring Diagram " (HR16DE),
EC-627, " Wiring Diagram " (MR Type 1) or
EC-1139, " Wiring
Diagram " (MR Type 2).
OK or NG OK >> GO TO 5.
NG >> Repair or replace damaged parts. 5.
CHECK FLUID TEMPERATURE SENSOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the TCM connector.
3. Check resistance between terminals.
OK or NG OK >> GO TO 9.
NG >> GO TO 6. 6.
CHECK HARNESS BETWEEN TCM AND TERM INAL CORD ASSEMBLY HARNESS CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect terminal cord assembly harness connector and TCM connector.
3. Check continuity between terminal cord assembly harness con-
nector terminal and TCM connector terminal.
4. If OK, check harness for short to ground and short to power.
5. If OK, check continuity bet ween ground and transaxle assembly.
6. Reinstall any part removed.
OK or NG Item
Connec-
tor Terminal Condition Judge-
ment stan-
dard
(Approx.)
A/T fluid
temperature
sensor E32 47 - 42 When 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
Item Connector Terminal
Tempera-
ture °C ( °F) Resistance
(Approx.)
A/T fluid
temperature
sensor E32 47 - 42
AT-379, " A/T Fluid Tempera-
ture Sensor "
SCIA2338E
Item Connector Terminal Continuity
TCM E32 42 Yes
Terminal cord assembly
harness connector F30 7
TCM E32 47 Yes
Terminal cord assembly
harness connector F30 6 SCIA2660E

DTC BATT/FLUID TEMP SEN (A/T FLU
ID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
AT-161
< SERVICE INFORMATION >
D
E
F
G H
I
J
K L
M A
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OK >> GO TO 7.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 7.
CHECK A/T FLUID TEMPERATURE SENSOR WITH TERMINAL CORD ASSEMBLY
1. Turn ignition switch OFF.
2. Disconnect terminal cord assembly connector in engine room.
3. Check resistance between terminal cord assembly terminals.
4. Reinstall any part removed.
OK or NG OK >> GO TO 8.
NG >> Repair or replace damaged parts. 8.
DETECT MALFUNCTIONING ITEM
1. Remove oil pan. Refer to AT-221, " Control Valve Assembly and Accumulators " .
2. Check the following items:
- A/T fluid temperature sensor
• Check resistance between terminal cord assembly harness con- nector terminals while changing temperature as shown.
- Harness of terminal cord assembly for short or open
OK or NG OK >> GO TO 9.
NG >> Repair or replace damaged parts. 9.
CHECK DTC
Perform AT-157, " DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> GO TO 10. 10.
CHECK TCM
1. Check TCM input/output signal. Refer to AT-77, " TCM Terminal and Reference Value " .
2. If NG, recheck TCM pin terminals for dam age or loose connection with harness connector.
OK or NG OK >>
INSPECTION END
NG >> Repair or replace damaged parts.
Component Inspection INFOID:0000000004305449
A/T FLUID TEMPERATURE SENSOR Item Connector Terminal
Temperature
[° C ( °F)] Resistance
(Approx.)
A/T fluid tem-
perature sensor F30 6 - 7 AT-379, " A/T Fluid Temperature
Sensor "
SCIA4948E
Item Connector Terminal
Temperature
[° C ( °F)] Resistance
(Approx.)
A/T fluid tem-
perature sensor F30 6 - 7 AT-379, " A/T Fluid Temperature
Sensor "
SCIA7831E

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DTC TURBINE REVOLUTION SENSOR
Description INFOID:0000000004305450
The turbine revolution sensor (power train revolution s ensor) detects forward clutch drum rpm (revolutions per
minute). It is located on the input side of the automat ic 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 resu lt, optimal shift timing during deceleration and shift quality can be improved.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004305451
Remarks: Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004305452
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “TURBINE SENSOR” with CO NSULT-III or 10th judgement flicker without CON-
SULT-III is detected when TCM does not receiv e the proper voltage signal from the sensor.
Possible Cause INFOID:0000000004305453
• Harness or connector (The sensor circuit is open or shorted.)
• Turbine revolution sensor (power train revolution sensor)
DTC Confirmation Procedure INFOID:0000000004305454
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-III
1. Start engine.
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Touch “START”.
4. Drive vehicle under the following conditions for more than 5 seconds. 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 position
5. If the check result is NG, go to AT-165, " Diagnosis Procedure " .
WITHOUT CONSULT-III
1. Start engine.
2. Drive vehicle under the following conditions for more than 5 seconds. Selector lever posi tion: “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-83, " Diagnosis Procedure without CONSULT-III " .
4. If the check result is NG, go to AT-165, " Diagnosis Procedure " .
Item name Condition Display value
TURBINE REV During driving (lock-up ON) Approximately matches the engine speed.

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3. Check continuity between TCM connector terminals and turbine
revolution sensor (power train revolution sensor) harness con-
nector terminal. Refer to AT-50, " Circuit Diagram " and
AT-169, " Wiring Diagram - AT - MAIN " .
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG OK >> 10A fuse (No.49, located in the IPDM
E/R) or ignition switch are malfunctioning.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK HARNESS BETWEEN TCM AND TURBINE R EVOLUTION [(POWER TRAIN REVOLUTION SEN- OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> GO TO 5. Item Connector Terminal Continuity
TCM E31 10 Yes
Turbine revolu tion sensor
(power train revolution sensor) F47 1
TCM E31 19 Yes
Turbine revolu tion sensor
(power train revolution sensor) F47 1