2006 NISSAN VERSA Workshop Service Repair Manual

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Page 1065 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual CVT-168
DTC P1778 STEP MOTOR - FUNCTION
Revision: June 20062007 Versa
DTC P1778 STEP MOTOR - FUNCTIONPFP:31947
DescriptionUCS0063Q
The step motor is included in the control valve assembly.
The step

CVT-168
DTC P1778 STEP MOTOR - FUNCTION
Revision: June 20062007 Versa
DTC P1778 STEP MOTOR - FUNCTIONPFP:31947
DescriptionUCS0063Q
The step motor is included in the control valve assembly.
The step motor's 4 aspects of ON/OFF change according to the signal from TCM. As a result, the flow of
line pressure to primary pulley is changed and pulley ratio is controlled.
This diagnosis item is detected when electrical system is OK, but mechanical system is NG.
This diagnosis item is detected when the state of the changing the speed mechanism in unit does not
operate normally.
CONSULT-II Reference ValueUCS0063R
Remarks: Specification data are reference values.
On Board Diagnosis LogicUCS0063S
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P1778 STEP MOTR/FNC” with CONSULT-II is detected under the following con-
ditions.
–When not changing the pulley ratio according to the instruction of TCM.
Possible CauseUCS0063T
Step mot or
DTC Confirmation ProcedureUCS0063U
CAUTION:
Always drive vehicle at a safe speed.
Before starting “DTC Confirmation Procedure”, confirm “Hi” or “Mid” or “Low” fixation by “PRI
SPEED” and “VEHICLE SPEED” on “DATA MONITOR MODE”.
If hi-geared fixation occurred, go to CVT-169, "Diagnostic Procedure" .
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. Select “DATA MONITOR” mode for “TRANSMISSION” with
CONSULT-II.
4. Start engine and maintain the following conditions for at least 30
consecutive seconds.
TEST START FROM 0 km/h (0 MPH)
CONSTANT ACCELERATION: Keep 30 sec or more
VEHICLE SPEED: 10 km/h (6 MPH) or more
ACC PEDAL OPEN: More than 1.0/8
RANGE: “D” position
ENG SPEED: 450 rpm or more
5. If DTC is detected, go to CVT-169, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
STM STEP
During driving−20 step - 180 step
GEAR RATIO2.56 - 0.43
BCIA0031E

Page 1066 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual DTC P1778 STEP MOTOR - FUNCTION
CVT-169
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CVT
Revision: June 20062007 Versa
WITH GST
Follow the procedure “WITH CONSULT-II”.
Diagnostic ProcedureUCS0063V
1. CHECK STEP MOTOR

Page 1067 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual CVT-170
OVERDRIVE CONTROL SWITCH
Revision: June 20062007 Versa
OVERDRIVE CONTROL SWITCHPFP:25130
DescriptionUCS006XK
Overdrive control switch is installed to the selector lever.
O/D OFF indicator tu

Page 1068 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual OVERDRIVE CONTROL SWITCH
CVT-171
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CVT
Revision: June 20062007 Versa
Wiring Diagram — CVT — ODSWUCS006KQ
BCWA0686E

Page 1069 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual CVT-172
OVERDRIVE CONTROL SWITCH
Revision: June 20062007 Versa
TCM terminal data are reference values, measured between each terminal and ground.
Diagnostic ProcedureUCS006KR
1. CHECK CAN COMMUNICATIO

Page 1070 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual OVERDRIVE CONTROL SWITCH
CVT-173
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CVT
Revision: June 20062007 Versa
5. CHECK OVERDRIVE CONTROL SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect CVT device connector and

Page 1071 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual CVT-174
OVERDRIVE CONTROL SWITCH
Revision: June 20062007 Versa
Component InspectionUCS006KS
OVERDRIVE CONTROL SWITCH
With Intelligent Key
Check continuity between CVT device harness connector terminal

Page 1072 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual SHIFT POSITION INDICATOR CIRCUIT
CVT-175
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CVT
Revision: June 20062007 Versa
SHIFT POSITION INDICATOR CIRCUITPFP:24810
DescriptionUCS006XJ
TCM sends the switch signals to combinat

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