2009 NISSAN LATIO check engine

Part 1
† AT-188, " Vehicle Cannot Be Started from D .
† AT-190, " A/T Does Not Shift: D .
† AT-192, " A/T Does Not Shift: D .
† AT-193, " A/T Does Not Shift: D .
† AT-194, " A/T Does Not Perform Lock-up " .
† AT-195, " A/T Does Not Hold
Lock-up Condition " .
† AT-196, " Lock-up Is Not Released " .
† AT-197, " Engine Speed Does Not Return to Idle (Light Braking D " .
Part 2 AT-61Vehicle Cannot Be Started from D .
† AT-190, " A/T Does Not Shift: D .
† AT-192, " A/T Does Not Shift: D .
† AT-193, " A/T Does Not Shift: D .
Part 3 AT-62A/T Does Not Shift: D " .
† AT-199, " A/T Does Not Shift: D " .
† AT-200, " A/T Does Not Shift: 2 " .
† AT-202, " Vehicle Does Not Decelerate by Engine Brake " .
† Perform self-diagnosis. Enter checks for detected items. AT-79 ,
AT-83 .
† CAN COMMUNICATION LINE AT-88 .
† PARK/NEUTRAL POSITION (PNP) SWITCH AT-91 .
† A/T FLUID TEMPERATURE SENSOR CIRCUIT AT-96 .
† VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR) AT-101 .
† ENGINE SPEED SIGNAL AT-106 .
† A/T 1ST GEAR FUNCTION AT-110 .
† A/T 3RD GEAR FUNCTION AT-116 .
† A/T 4TH GEAR FUNCTION AT-119 .
† TORQUE CONVERTER CLUTCH SOLENOID VALVE AT-124 .
† A/T TCC S/V FUNCTION (LOCK-UP) AT-129 .
† LINE PRESSURE SOLENOID VALVE AT-134 .
† SHIFT SOLENOID VALVE A AT-139 .
† SHIFT SOLENOID VALVE B AT-144 .
† OVERRUN CLUTCH SOLENOID VALVE AT-149 .
† VEHICLE SPEED SENSOR MTR AT-154 .
† BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POWER SOURCE)
AT-157 .
† TURBINE REVOLUTION SENSOR AT-163 .
† CONTROL UNIT (RAM), CONTROL UNIT (ROM) AT-168 .
† MAIN POWER SUPPLY AND GROUND CIRCUIT AT-169 .
5. † For self-diagnosis NG items, inspect each component. Repair or replace the damaged parts. AT-79 ,
AT-83 6.
† Perform “Road Test”. AT-557.
† Perform the Diagnostic Procedures for all remaining items marked NG. Repair or replace the damaged parts.
Refer to the Symptom Chart when you perform the procedures. (The chart also shows some other possible symp-
toms and the component inspection orders.) AT-658.
† Erase DTC from TCM and ECM memories. AT-39 ,
AT-83

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Inspections Before Trouble Diagnosis
INFOID:0000000004305319
A/T FLUID CHECK
Fluid Leakage and Fluid Level Check Check fluid leakage and check the fluid level. Refer to AT-17, " Checking A/T Fluid " .
Fluid Condition Check Check the A/T fluid condition.
STALL TEST
Stall Test Procedure 1. Check ATF and engine oil levels. If necessary, add ATF and engine oil.
2. Drive vehicle for approximately 10 minutes or until ATF and engine oil reach operating temperature.
3. Set parking brake and block wheels.
4. Install a tachometer where it can be seen by driver during test. •It is good practice to mark the point of specified engine
rpm on indicator.
5. Start engine, apply foot brake, and place selector lever in “D” position.Fluid status Conceivable Cause Required Operation
Varnished (viscous
varnish state) Clutch, brake
scorched Replace the ATF and check the A/T
main unit and the vehicle for mal-
functions (wire harnesses, cooler
pipes, etc.)
Milky white or
cloudy Water in the ATFReplace the ATF and check for plac-
es where water is getting in.
Large amount of
metal powder mixed
in Unusual wear of
sliding parts within
A/T Replace the ATF and check for im-
proper operation of the A/T. SAT775B

AT-54< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Location of line pressure test ports are shown in the figure.
• Always replace pressure plugs as they are self-sealing bolts.
Line Pressure Test Procedure
1. Check ATF and engine oil levels. If necessary, add ATF or engine oil.
2. Drive vehicle for approx. 10 minutes or until engine oil and ATF reach operating temperature.
3. Install oil pressure gauge to corresponding line pressure test port.
4. Set parking brake and block wheels.
5. Start engine and measure line pressure at idle and stall speed. CAUTION:
• Keep the brake pedal pressed all the way down during
measurement.
• When measuring the line pressure at the stall speed, refer to "STALL TEST". SCIA7187E
ATF operating temperature: 50 - 80
°C (122 -176 °F) SAT647B
SCIA6528J
SAT513G
SAT493G

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Line Pressure
Judgement of Line Pressure Test
Road Test INFOID:0000000004305320
DESCRIPTION • The purpose of the test is to det ermine overall performance of A/T
and analyze causes of malfunctions.
• The road test consists of the following three parts:
1. Check before engine is started. Refer to AT-56 .
2. Check at idle. Refer to AT-56 .
3. Cruise test • Inspection all the item from Part 1 to Part 3. Refer to AT-58 ,
AT-61 and
AT-62 .
Engine speed
Line pressure [kPa (kg/cm
2
, psi)]
D, 2nd and 1st positions R position
Idle speed AT-373, " Line Pressure "
Stall speed
Judgement Suspected parts
At idle Line pressure is low in all positions. • Oil pump wear
• Control piston damage
• Pressure regulator valve or plug sticking
• Spring for pressure regulator valve damaged
• Fluid pressure leakage between oil strainer and pressure regulator valve
• Clogged strainer
Line pressure is low in particular posi-
tion. • Fluid pressure leakage between manual valve and particular clutch
• For example, line pressure is: − Low in “R” and “1 ” positions, but
− Normal in “D”, and “2” positions.
Therefore, fluid leakage exists at or around low and reverse brake circuit.
Refer to AT-22, " Shift Mechanism " .
Line pressure is high. • Accelerator pedal position signal malfunction • A/T fluid temperature sensor damaged
• Line pressure solenoid valve sticking
• Short circuit of line pressure solenoid valve circuit
• Pressure modifier valve sticking
• Pressure regulator valve or plug sticking
• Open in dropping resistor circuit
At stall
speed Line pressure is low. • Accelerator pedal position signal malfunction
• Line pressure solenoid valve sticking
• Short circuit of line pressure solenoid valve circuit
• Pressure regulator valve or plug sticking
• Pressure modifier valve sticking
• Pilot valve sticking

). Per-
form a diagnosis of the NG items after the completion of all the
road tests.
Check Before Engine Is Started INFOID:0000000004305321YES >> 1. Turn ignition switch OFF.
2. Perform self-diagnosis and note NG items.Refer to AT-79, " CONSULT-III Function (TRANS-
MISSION) " ,
AT-83, " Diagnosis Procedure without
CONSULT-III " .
3. Go to AT-56, " Check at Idle " .
NO >> Stop “Road Test”. Go to AT-181, " OD OFF Indicator
Lamp Does Not Come On " .
Check at Idle INFOID:0000000004305322YES >> GO TO 2.
NO >> • Stop “Road Test”. Mark the box on the “Diagnostic
Worksheet Chart”.
• Go to AT-183, " Engine Cannot Be Started in "P" and
"N" Position " . SAT772B
SAT769B

TROUBLE DIAGNOSIS
AT-61
< SERVICE INFORMATION >
D
E
F
G H
I
J
K L
M A
B AT
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• Continue “Road Test”. 8.
CHECK SHIFT-DOWN (D 4 TO D 3 )
Decelerate vehicle by applying foot brake lightly. Read gear position and engine speed. Refer to AT-79, " CON-
SULT-III Functi
on (TRANSMISSION) " .
Does engine speed return to idle smoothly when A/T is shifted from D 4 to D 3 ?
YES >> 1. Stop vehicle.
2. Go to AT-61, " Cruise Test - Part 2 " .
NO >> • Mark the box on the “D iagnostic Worksheet Chart”.
• Go to AT-197, " Engine Speed Does Not Return to Idle
(Light Braking D 4 → D 3 ) " .
• Continue “Road Test”.
Cruise Test - Part 2 INFOID:00000000043053241.
CHECK STARTING GEAR (D 1 ) POSITION
1. Push overdrive control switch. (OD OFF indicator lamp is off.)
2. Move selector lever to “D” position.
3. Accelerate vehicle by half throttle again.
Read gear position. Refer to AT-79, " CONSULT-III Func-
tion (TRANSMISSION) " .
Does vehicle start from D 1 ?
YES >> GO TO 2.
NO >> • Mark the box on the “D iagnostic Worksheet Chart”.
• Go to AT-188, " Vehicle Cannot Be Started from D 1 " .
• Continue “Road Test”. 2.
CHECK SHIFT-UP AND SHIFT-DOWN (D 3 TO D 4 TO D 2 )
1. Accelerate vehicle to 80 km/h (50 MPH) as shown in the figure.
2. Release accelerator pedal and then quickly depress it fully.
Read gear position and th rottle opening. Refer to AT-79," CONSULT-III Function (TRANSMISSION) " .
Does A/T shift from D 4 to D 2 as soon as accelerator pedal is
depressed fully?
YES >> GO TO 3.
NO >> • Mark the box on the “D iagnostic Worksheet Chart”.
• Go to AT-190, " A/T Does Not Shift: D 1 → D 2 or Does
Not Kickdown: D 4 → D 2 " .
• Continue “Road Test”. 3.
CHECK SHIFT-UP (D 2 TO D 3 )
Check shift-up (D 2 to D 3 )
Specified speed when shifting from D 2 to D 3 . Refer to AT-64, " Vehicle Speed at Which Gear Shifting Occurs " .SAT959I
SAT495G
SCIA7192E

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*1
: These terminals are connected to the data link connector.
*2 : These terminals are connected to the ECM.
CONSULT-III Function (TRANSMISSION) INFOID:0000000004305330
CONSULT-III can display each diagnostic item using the diagnostic test models shown following.
FUNCTION
CONSULT-III REFERENCE VALUE NOTICE:
1. The CONSULT-III electrically displays shift timi ng and lock-up timing (that is, operation timing of each
solenoid).
Check for time difference between actual shift timi ng and the CONSULT-III display. If the difference is
noticeable, mechanical parts (except solenoids, sens ors, etc.) may be malfunctioning. Check mechanical
parts using applicable diagnostic procedures.
2. Shift schedule (which implies gear position) display ed on CONSULT-III and that indicated in Service Man-
ual may differ slightly. This occurs because of the following reasons:
- Actual shift schedule has more or less tolerance or allowance,
- Shift schedule indicated in Service Manual re fers to the point where shifts start, and
- Gear position displayed on CONSULT-III indicates the point where shifts are completed.
3. Shift solenoid valve “A” or “B” is displayed on CONSUL T-III at the start of shifting. Gear position is dis-
played upon completion of shifting (which is computed by TCM).
39
*2
L Engine speed signal
and Refer to
EC-461 (HR16DE),
EC-597 (MR Type 1) or
EC- 1109 (MR Type 2).
40 O Vehicle speed sensor When driving vehicle at 2 to 3 km/h (1 to
2 MPH) for 1 m (3 ft) or more. Voltage varies
between less
than 0 V and
more than 4.5 V
42 B Sensor ground Always 0 V
47 BR A/T fluid temperature
sensor and 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
48 B Ground Always 0 V
Terminal
Wire
color Item Condition Judgement stan-
dard (Approx.) Diagnostic test mode Function
Work Support This mode enables a technician to adjust some devices faster and more accuratelyI.
Self Diagnostic Results Retrieve DTC from ECU and display diagnostic items.
Data Monitor Monitor the input/output signal of the control unit in real time.
CAN Diagnosis Support Monitor It monitors the status of CAN communication.
Function Test This mode can show results of self-diagnosis of ECU with either “OK” or “NG”. For engine, more
practical tests regarding sensors/switches and/or actuators are available.
DTC & SRT confirmation The status of system monitoring tests and the self-diagnosis status/result can be confirmed.
ECU Identification Display the ECU identification number (part number etc.) of the selected system. Item name Condition Display value (Approx.)
VHCL/S SE-A/T During driving Approximately matches the speedometer
reading.
VHCL/S SE-MTR
THROTTLE POSI Released accelerator pedal. 0.0/8
Fully depressed accelerator pedal. 8.0/8

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CAN DIAGNOSTIC SUPPORT MONITOR MODE
Refer to LAN-14, " CAN Diagnostic Support Monitor " .
DTC & SRT CONFIRMATION
Display Items List
Diagnosis Procedure without CONSULT-III INFOID:0000000004305331
TCM SELF-DIAGNOSTIC PROCEDURE
THROTTLE POSI (0.0/8) — X
Degree of opening for accelerator recog-
nized by the TCM
For fail-safe operation, the specific value
used for control is displayed.
LINE PRES DTY (%) — X
TCC S/V DUTY (%) — X
SHIFT S/V A (ON/OFF) — X
SHIFT S/V B (ON/OFF) — X
OVERRUN/C S/V (ON/OFF) — X
SELF-D DP LMP (ON/OFF) — X
TC SLIP RATIO (0.000) — —
TC SLIP SPEED (rpm) — — Difference between engine speed and
torque converter input shaft speed
Monitored item (Unit)
Monitor Item Selection
Remarks
TCM INPUT
SIGNALS MAIN SIG-
NALS SELEC-
TION FROM
MENU DTC work support item Description Check item
1ST GR FNCTN P0731 Following items for “A/T 1st gear function (P0731)” can be con-
firmed.
• Self-diagnosis status (whether the diagnosis is being performed or not)
• Self-diagnostic results (OK or NG) • Shift solenoid valve A
• Shift solenoid valve B
• Each clutch
• Hydraulic control circuit
2ND GR FNCTN P0732 Following items for “A/T 2nd gear function (P0732)” can be con-
firmed.
• Self-diagnosis status (whether the diagnosis is being performed or not)
• Self-diagnostic results (OK or NG) • Shift solenoid valve B
• Each clutch
• Hydraulic control circuit
3RD GR FNCTN P0733 Following items for “A/T 3rd gear function (P0733)” can be con-
firmed.
• Self-diagnosis status (whether the diagnosis is being performed
or not)
• Self-diagnostic results (OK or NG) • Shift solenoid valve A
• Each clutch
• Hydraulic control circuit
4TH GR FNCTN P0734 Following items for “A/T 4th gear function (P0734)” can be con-
firmed.
• Self-diagnosis status (whether the diagnosis is being performed or not)
• Self-diagnostic results (OK or NG) • Shift solenoid valve A
• Shift solenoid valve B
• Overrun clutch solenoid valve
• Line pressure solenoid valve
• Each clutch
• Hydraulic control circuit
TCC S/V FNCTN P0744 Following items for “A/T TCC S/V
function (lock-up) (P0744)” can
be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed or not)
• Self-diagnostic results (OK or NG) • Torque converter clutch sole-
noid valve
• Each clutch
• Hydraulic control circuit