2009 NISSAN LATIO wiring

CVT-34< SERVICE INFORMATION >
[RE0F08A]
TROUBLE DIAGNOSIS
If an unexpected signal is sent from the solenoid to t he TCM, the CVT lock-up select solenoid is turned OFF to
cancel the lock-up.
TCM Power Supply (Memory Back-up)
Transaxle assembly is protected by limiting the engine torque when the memory back-up power supply (for
controlling) from the battery is not supplied to TCM. Normal statues is restored when turning the ignition switch
OFF to ON after the normal power supply.
How to Perform Trouble Diagnosis for Quick and Accurate Repair INFOID:0000000004666882
INTRODUCTION
The TCM receives a signal from the vehicle speed sensor, PNP switch and provides shift control or lock-up
control via CVT solenoid valves.
The TCM also communicates with the ECM by means of a signal
sent from sensing elements used wit h the OBD-related parts of the
CVT system for malfunction-diagnostic purposes. The TCM is capa-
ble of diagnosing malfunctioning parts while the ECM can store mal-
functions in its memory.
Input and output signals must always be correct and stable in the
operation of the CVT system. The CVT system must be in good
operating condition and be free of valve seizure, solenoid valve mal-
function, etc.
It is much more difficult to diagnose an error that occurs intermit-
tently rather than continuously. Mo st intermittent errors are caused
by poor electric connections or improper wiring. In this case, careful
checking of suspected circuits ma y help prevent the replacement of
good parts.
A visual check only may not find the cause of the errors. A road test
with CONSULT-III (or GST) or a circuit tester connected should be
performed. Follow the "WORK FLOW" .
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such errors, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A “DIAGNOSTIC WORKSHEET” as
shown on the example (Refer to "Diagnostic Worksheet Chart" )
should be used.
Start your diagnosis by looking for “conventional” errors first. This will
help troubleshoot driveability errors on an electronically controlled
engine vehicle.
Also check related Service bulletins.
WORK FLOW
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malf unction. It is important to fully understand the symp-
toms or conditions for a customer complaint.
Make good use of the two sheets provided, "Informati on From Customer" and "Diagnostic Worksheet Chart" ,
to perform the best troubleshooting possible.
Work Flow Chart SAT631IB
SAT632I
SEF234G

CVT
N
O P
Wiring Diagram - CVT - CAN
INFOID:0000000004666898
TCM TERMINALS AND REFERENCE VALUES Refer to CVT-49, " TCM Terminal and Reference Value " .

CVT
N
O P
DTC U1010 TRANSMISSION
CONTROL MODULE (CAN)
Description INFOID:0000000004666900
CAN (Controller Area Network) is a serial communication li ne for real time application. It is an on-vehicle mul-
tiplex communication line with high data communica tion speed and excellent malfunction detection ability.
Many electronic control units are equipped onto a vehicl e, and each control unit shares information and links
with other control units during operation (not independent ). In CAN communication, control units are con-
nected with 2 communication lines (CAN-H line, CAN-L li ne) allowing a high rate of information transmission
with less wiring. Each control unit transmits/recei ves data but selectively reads required data only.
On Board Diagnosis Logic INFOID:0000000004666901
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “U1010 CONTROL UNIT(CAN)” with CONSULT-III is detected when TCM cannot
communicate to other control units.
Possible Cause INFOID:0000000004666902
Harness or connectors
(CAN communication line is open or shorted.)
DTC Confirmation Procedure INFOID:0000000004666903
NOTE:
If “DTC Confirmation Procedure” has been previously performed, alw ays turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESU LTS” and then perform the following procedure to con-
firm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine and wait for at least 6 seconds.
4. If DTC is detected, go to CVT-63, " Diagnosis Procedure " .
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis Procedure INFOID:0000000004666904DTC Confirmation Procedure " .
Is any malfunction of the “ U1010 CONTROL UNIT(CAN) ” indicated?
YES >> Replace the TCM. Refer to
CVT-170, " Removal and Installation " .
NO >> INSPECTION END

CVT
N
O P
Wiring Diagram - CVT - STSIG
INFOID:0000000004666910
TCM TERMINALS AND REFERENCE VALUES Refer to CVT-49, " TCM Terminal and Reference Value " .

OK >> GO TO 3.
NG >> GO TO 2. .
• Open or short-circuit in the harness between TCM and the starter relay. Refer to CVT-65, " Wiring Diagram -
CVT - STSIG " .
• Ground circuit for the starter relay. Refer to SC-11, " Wiring Diagram - START - " .
OK or NG OK >> GO TO 3.
NG >> Repair or replace damaged parts. DTC Confirmation Procedure " .
OK or NG OK >>
INSPECTION END
NG >> GO TO 4. TCM Terminal and Reference Value " .
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG OK >>
INSPECTION END
NG >> Repair or replace damaged parts.
Item name Condition Display value
STRTR RLY OUT Selector lever in “P” and
“N” positions ON
Selector lever in other po-
sitions OFF
STRTR RLY MON Selector lever in “P” and
“N” positions ON
Selector lever in other po-
sitions OFFTerminal Item Condition Data (Approx.)
24 Starter
relay Selector lever in “N” and “P”
positions Battery voltage
Selector lever in other posi-
tions 0 V

OK >>
INSPECTION END
NG >> GO TO 3. Wiring Diagram - CVT - NON-
DTC " .
Check stop lamp switch after adjusting brake pedal — refer to
BR-6 .
OK or NG OK >> Check the following. If NG, repair or replace damaged parts.
• Harness for short or open between battery and stop lamp switch.
• Harness for short or open between stop lamp switch and combination meter.
NG >> Repair or replace the stop lamp switch.
Item name Condition Display value
BRAKE SW Depressed brake pedal ON
Released brake pedal OFF Condition Continuity
When brake pedal is depressed Yes
When brake pedal is released No

CVT
N
O P
Wiring Diagram - CVT - PNP/SW
INFOID:0000000004666923
TCM TERMINALS AND REFERENCE VALUES Refer to CVT-49, " TCM Terminal and Reference Value " .

CVT
N
O P
Wiring Diagram - CVT - PRSCVT
INFOID:0000000004666939
TCM TERMINALS AND REFERENCE VALUES Refer to CVT-49, " TCM Terminal and Reference Value " .