2008 NISSAN LATIO cruise control

AT-118
< SERVICE INFORMATION >
DTC P0734 A/T 4TH GEAR FUNCTION
NG >> Repair control valve.
10.CHECK SHIFT-UP (D3 TO D4)
During AT-55, "
Cruise Test - Part 1".
Does A/T shift from D
3 to D4 at the specified speed?
YES >> GO TO 11.
NO >> Check control valve again. Repair or replace control
valve assembly.
11 .CHECK DTC
Perform AT-114, "
DTC Confirmation Procedure".
OK or NG
OK >>INSPECTION END
NG >> Perform AT-55, "
Cruise Test - Part 1" again and return to the start point of this test group.
SCIA7190E

DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
AT-125
< SERVICE INFORMATION >
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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 AT-61, "
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 AT-73, "
CONSULT-III Func-
tion (A/T)".
6. Make sure that “OK” is displayed. (If “NG” is displayed, refer to “DIAGNOSTIC PROCEDURE”.)
Refer to AT-125, "
Diagnosis Procedure".
Refer to AT-61, "
Vehicle Speed at Which Lock-up Occurs/Releases".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID:0000000001703265
1.CHECK SHIFT-UP (D3 TO D4)
During AT-55, "
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-48, "
Inspections Before Trouble Diagnosis".
OK or NG
OK >> GO TO 3.
NG >> GO TO 6.
3.CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT-263, "
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

AT-126
< SERVICE INFORMATION >
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
During AT-55, "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-124, "
DTC Confirmation Procedure".
OK or NG
OK >>INSPECTION END
NG >> GO TO 11. Check for proper lock-up.
6.CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT-216, "
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-130, "
Wiring Diagram -
AT - L P S V".
OK or NG
OK >> GO TO 7.
NG >> Replace solenoid valve assembly.
7.CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT-216, "
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-
130, "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-263, "
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)
SCIA7190E
Solenoid valve Connectror Terminal Resistance (Approx.)
Line pressure solenoid
valveF30 4 - Ground 2.5 - 5 Ω
SCIA3457E
SCIA3275E

DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
AT-127
< SERVICE INFORMATION >
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During AT-55, "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.
10.CHECK DTC
Perform AT-124, "
DTC Confirmation Procedure".
OK or NG
OK >>INSPECTION END
NG >> GO TO 11. Check for proper lock-up.
11 .CHECK LOCK-UP
During AT-55, "
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-216, "
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-120, "
Wiring Diagram -
AT - T C V".
OK or NG
OK >> GO TO 13.
NG >> Replace solenoid valve assembly.
13.CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT-216, "
Control Valve Assembly and Accumulators".
- Torque converter clutch solenoid valve
SCIA7190E
SCIA7191E
Solenoid valve Connectror Terminal Resistance (Approx.)
Torque converter clutch
solenoid valveF30 5 - Ground 5 - 20 Ω
SCIA2063E

AT-128
< SERVICE INFORMATION >
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
2. Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground. Refer to AT-
120, "Wiring Diagram - AT - TCV".
OK or NG
OK >> GO TO 14.
NG >> Replace solenoid valve assembly.
14.CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT-263, "
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-55, "
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-124, "
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.
SCIA2066E
SCIA7191E

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-183
< SERVICE INFORMATION >
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3.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-216, "
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
3. Disassemble A/T. Refer to AT-240, "
Disassembly" .
4. Check the following item:
- Oil pump assembly. Refer to AT-260, "
Oil Pump" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK STALL REVOLUTION
Check stall revolution with selector lever in “D” position. Refer to AT-48, "
Inspections Before Trouble Diagno-
sis" .
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING ITEM
1. Disassemble A/T. Refer to AT-240, "
Disassembly" .
2. Check the following items:
- Oil pump assembly. Refer to AT-260, "
Oil Pump" .
- Forward clutch assembly. Refer to AT-288, "
Forward and Overrun Clutches" .
- Forward one-way clutch. Refer to AT-299, "
Rear Internal Gear and Forward Clutch Hub" .
- Low one-way clutch. Refer to AT-240, "
Disassembly" .
- Torque converter. Refer to AT-240, "
Disassembly" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-230, "
Component" .
2. Check A/T fluid condition. Refer to AT-48, "
Inspections Before Trouble Diagnosis" .
OK or NG
OK >> GO TO 7.
NG >> GO TO 5.
7.CHECK SYMPTOM
Check again. Refer to AT-53, "
Check at Idle" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 8.
8.CHECK TCM
1. Check TCM input/output signals. Refer to AT-71, "
TCM Terminal and Reference Value" .
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 Cannot Be Started from D1INFOID:0000000001703342
SYMPTOM:
Vehicle cannot be started from D1 on “Cruise Test — Part 1”.

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-185
< SERVICE INFORMATION >
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1. Remove control valve assembly. Refer to AT-216, "Control Valve Assembly and Accumulators" .
2. Check the following items:
- Shift valve A
- Shift valve B
- Shift solenoid valve A
- Shift solenoid valve B
- Pilot valve
- Pilot filter
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damage parts.
8.CHECK SYMPTOM
Check again. Refer to AT-55, "
Cruise Test - Part 1" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 9.
9.CHECK TCM
1. Check TCM input/output signals. Refer to AT-71, "
TCM Terminal and Reference Value" .
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.
A/T Does Not Shift: D1→ D2or Does Not Kickdown: D4→ D2INFOID:0000000001703343
SYMPTOM:
•A/T does not shift from D1 to D2 at the specified speed on “Cruise Test — Part 1”.
•A/T does not shift from D
4 to D2 when depressing accelerator pedal fully at the specified speed on
“Cruise Test — Part 2”.
DIAGNOSTIC PROCEDURE
1.CHECK SYMPTOM
Check symptom . Refer to AT-53, "
Check at Idle" and AT-55, "Cruise Test - Part 1" .
Are
“Vehicle Dose Not Creep Forward in “D”, “2” or “1” Position” and “Vehicle Cannot Be Started from D1 ”
OK?
YES >> GO TO 2.
NO >> Go to AT-182, "
Vehicle Does Not Creep Forward in "D", "2" or "1" Position" and AT-183, "Vehicle
Cannot Be Started from D1" .
2.CHECK A/T POSITION
Check A/T position. Refer to AT-207, "
Checking of A/T Position" .
OK or NG
OK >> GO TO 3.
NG >> Adjust A/T position. Refer to AT-207, "
Adjustment of A/T Position" .
3.CHECK VEHICLE SPEED SENSOR·A/T AND VEHICLE SPEED SENSOR·MTR CIRCUIT
Check vehicle speed sensor·A/T (revolution sensor) and vehicle speed sensor·MTR circuit. Refer to AT- 9 6
and AT-149 .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace vehicle speed sensor·A/T (revolution sensor) and vehicle speed sensor·MTR
circuits.
4.CHECK ACCELERATOR PEDAL POSITION SENSOR
Check accelerator pedal position sensor. Refer to EC-493
.

AT-186
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
OK or NG
OK >> GO TO 5.
NG >> Repair or replace accelerator pedal position sensor.
5.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-230, "
Component" .
2. Check A/T fluid condition. Refer to AT-48, "
Inspections Before Trouble Diagnosis" .
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6.DETECT MALFUNCTIONING ITEM
1. Remove control valve. Refer to AT-216, "
Control Valve Assembly and Accumulators" .
2. Check the following items:
- Shift valve A
- Shift valve B
- Shift solenoid valve A
- Shift solenoid valve B
- Pilot valve
- Pilot filter
3. Disassemble A/T. Refer to AT-240, "
Disassembly" .
4. Check the following items:
- Servo piston assembly
- Brake band
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
7.DETECT MALFUNCTIONING ITEM
1. Remove control valve. Refer to AT-216, "
Control Valve Assembly and Accumulators" .
2. Check the following items:
- Shift valve A
- Shift valve B
- Shift solenoid valve A
- Shift solenoid valve B
- Pilot valve
- Pilot filter
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
8.CHECK SYMPTOM
Check again. Refer to AT-55, "
Cruise Test - Part 1" and AT-58, "Cruise Test - Part 2" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 9.
9.CHECK TCM
1. Check TCM input/output signals. Refer to AT-71, "
TCM Terminal and Reference Value" .
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.
A/T Does Not Shift: D2→ D3INFOID:0000000001703344
SYMPTOM: