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CVT-160
DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUIT
Revision: June 20062007 Versa
TCM terminal data are reference values, measured between each terminal and ground.
Diagnostic ProcedureUCS0063B
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch ON.
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “TRANSMISSION” with CONSULT-II.
3. Read out the value of “LUSEL SOL OUT”.
Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between TCM connector terminal and ground.
3. Turn ignition switch OFF.
4. Disconnect the TCM connector.
5. Check if there is continuity between connector terminal and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
Terminal Wire color Item Condition Data (Approx.)
4BRLock-up select
solenoid valveSelector lever in “P” and “N” posi-
tions Battery voltage
Wait at least for 5 seconds with the
selector lever in “R”, “D” and “L”
positions0 V
Item name Condition Display value
LUSEL SOL OUTSelector lever in “P” and
“N” positions ON
Wait at least for 5 seconds
with the selector lever in
“R”, “D” and “L” positionsOFF
Name Connector Terminal ConditionVoltage
(Approx.)
Lock-up
select sole-
noid valveE31 4 - GroundSelector lever in “P” and
“N” positions Battery
voltage
Wait at least for 5 sec-
onds with the selector
lever in “R”, “D” and “L”
positions0 V
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DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUIT
CVT-161
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2. CHECK LOCK-UP SELECT SOLENOID VALVE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check resistance between TCM connector terminal and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 3.
3. CHECK VALVE RESISTANCE
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector.
3. Check resistance between CVT unit harness connector terminal
and ground.
OK or NG
OK >> GO TO 4.
NG >> Replace the transaxle assembly. Refer to CVT-207,
"Removal and Installation" .
4. CHECK HARNESS BETWEEN TCM AND LOCK-UP SELECT SOLENOID VALVE
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check continuity between TCM connector terminal and CVT unit
harness connector terminal.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK DTC
Perform CVT-158, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
Solenoid valve Connector TerminalResistance
(Approx.)
Lock-up select solenoid
valveE31 4 - Ground 5 - 20 Ω
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Solenoid valve Connector TerminalResistance
(Approx.)
Lock-up select solenoid valve F46 13 - Ground 5 - 20 Ω
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Item Connector Terminal Continuity
TCM E31 4
Ye s
CVT unit harness connector F46 13
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CVT-162
DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUIT
Revision: June 20062007 Versa
6. CHECK TCM
1. Check TCM input/output signals. Refer to CVT-54, "
TCM Input/Output Signal Reference Values" .
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>INSPECTION END
NG >> 1. Repair or replace damaged parts.
2. Replace TCM. Refer to CVT-9, "
Service After Replacing TCM and Transaxle Assembly" .
Component InspectionUCS0063C
LOCK-UP SELECT SOLENOID VALVE
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector.
3. Check resistance between CVT unit harness connector terminal
and ground.
4. If NG, replace the transaxle assembly. Refer to CVT-207,
"Removal and Installation" .
Solenoid valve Connector TerminalResistance
(Approx.)
Lock-up select solenoid valve F46 13 - Ground 5 - 20 Ω
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DTC P1745 LINE PRESSURE CONTROL
CVT-163
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DTC P1745 LINE PRESSURE CONTROLPFP:31036
DescriptionUCS0063D
The pressure control solenoid valve A (line pressure solenoid valve) regulates the oil pump discharge pres-
sure to suit the driving condition in response to a signal sent from the TCM.
On Board Diagnosis LogicUCS0063E
This is not an OBD-II self-diagnostic item.
Diagnostic trouble code “P1745 L/PRESS CONTROL” with CONSULT-II is detected when TCM detects
the unexpected line pressure.
Possible CauseUCS0063F
TCM
DTC Confirmation ProcedureUCS0063G
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESULTS” and then perform the following procedure to con-
firm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
2. Make sure that output voltage of CVT fluid temperature sensor
is within the range below.
ATF TEMP SEN: 1.0 - 2.0 V
If out of range, drive the vehicle to decrease the voltage
(warm up the fluid) or stop engine to increase the voltage
(cool down the fluid)
3. If DTC is detected, go to CVT-163, "
Diagnostic Procedure" .
Diagnostic ProcedureUCS0063H
1. CHECK DTC
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “TRANSMISSION” with CONSULT-II.
3. Erase self-diagnostic results. Refer to CVT-63, "
How to Erase Self-diagnostic Results" .
4. Turn ignition switch OFF, and wait for 10 seconds or more.
5. Start engine.
6. Confirm self-diagnostic results again. Refer to CVT-60, "
SELF-DIAGNOSTIC RESULT MODE" .
Is the
“P1745 L/PRESS CONTROL” displayed?
YES >> Replace TCM. Refer to CVT-9, "Service After Replacing TCM and Transaxle Assembly" .
NO >>INSPECTION END
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CVT-164
DTC P1777 STEP MOTOR - CIRCUIT
Revision: June 20062007 Versa
DTC P1777 STEP MOTOR - CIRCUITPFP:31020
DescriptionUCS0063I
The step motor is included in the control valve assembly.
The step motor changes the step with turning 4 coils ON/OFF according to the signal from TCM. As a
result, the flow of line pressure to primary pulley is changed and pulley ratio is controlled
CONSULT-II Reference ValueUCS0063J
Remarks: Specification data are reference values.
On Board Diagnosis LogicUCS0063K
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P1777 STEP MOTR CIRC” with CONSULT-II is detected under the following
conditions.
–When operating step motor ON and OFF, there is no proper change in the voltage of TCM terminal which
corresponds to it.
Possible CauseUCS0063L
Step motor
Harness or connectors
(Step motor circuit is open or shorted.)
DTC Confirmation ProcedureUCS0063M
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESULTS” and then perform the following procedure to con-
firm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
2. Drive vehicle for at least 5 consecutive seconds.
3. If DTC is detected, go to CVT-166, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value (Approx.)
STM STEP
During driving−20 step - 180 step
SMCOIL A
Changes ON⇔OFF. SMCOIL B
SMCOIL C
SMCOIL D
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DTC P1777 STEP MOTOR - CIRCUIT
CVT-165
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Revision: June 20062007 Versa
Wiring Diagram — CVT — STMUCS0063N
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Page 1063 of 2896

CVT-166
DTC P1777 STEP MOTOR - CIRCUIT
Revision: June 20062007 Versa
TCM terminals data are reference values, measured between each terminal and ground.
Diagnostic ProcedureUCS0063O
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start engine.
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “TRANSMISSION” with CONSULT-II.
3. Start vehicle and read out the value of “STM STEP”, “SMCOIL
A”, “SMCOIL B”, “SMCOIL C”, and “SMCOIL D”.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK HARNESS BETWEEN TCM AND STEP MOTOR
1. Turn ignition switch OFF.
2. Disconnect CVT unit connector and TCM connector.
3. Check continuity between TCM connector terminals and CVT
unit harness connector terminals.
4. If OK, check harness for short to ground and short to power.
5. If OK, check continuity between body ground and CVT assembly.
6. Reinstall any part removed.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
Terminal Wire color Item Condition Data (Approx.)
11 L Step motor A Within 2 seconds after ignition switch ON, the time measure-
ment by using the pulse width measurement function (Hi level)
of CONSULT-II.*1
CAUTION:
Connect the diagnosis data link cable to the vehicle diag-
nosis connector.
*1: A circuit tester cannot be used to test this item.30.0 msec
12 Y Step motor B10.0 msec
20 W Step motor C30.0 msec
21 P Step motor D10.0 msec
Item name Condition Display value (Approx.)
STM STEP
During driving−20 step - 180 step
SMCOIL A
Changes ON⇔OFF. SMCOIL B
SMCOIL C
SMCOIL D
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Item Connector Terminal Continuity
TCM E31 11
Ye s
CVT unit harness connector F46 6
TCM E31 12
Ye s
CVT unit harness connector F46 7
TCM E31 20
Ye s
CVT unit harness connector F46 8
TCM E31 21
Ye s
CVT unit harness connector F46 9
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DTC P1777 STEP MOTOR - CIRCUIT
CVT-167
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3. CHECK STEP MOTOR
Check step motor. Refer to CVT-167, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK DTC
Perform CVT-164, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 5.
5. CHECK TCM
1. Check TCM input/output signals. Refer to CVT-54, "
TCM Input/Output Signal Reference Values" .
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.
Component InspectionUCS0063P
STEP MOTOR
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector.
3. Check resistance between CVT unit harness connector termi-
nals and ground.
4. If NG, replace the transaxle assembly. Refer to CVT-207, "
Removal and Installation" .
Name Connector TerminalResistance
(Approx.)
Step motor F466 - 7
30 Ω
8 - 9
6 - Ground
15 Ω 7 - Ground
8 - Ground
9 - Ground
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