2009 NISSAN TIIDA Service Repair Manual

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Page 1257 of 4331

NISSAN TIIDA 2009 Service Repair Manual DTC P1777 STEP MOTOR - CIRCUIT
CVT-313
< SERVICE INFORMATION >
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Diagnosis Procedure
INFOID:00000000043057831.
CHECK INPUT SIGNALS
With CONSULT-III
1. Start e

Page 1258 of 4331

NISSAN TIIDA 2009 Service Repair Manual CVT-314< SERVICE INFORMATION >
[RE0F08B]
DTC P1777 STEP MOTOR - CIRCUIT 5.
CHECK TCM
1. Check TCM input/output signals. Refer to CVT-228, " TCM Terminal and Reference Value " .
2. If NG, re-check TC

Page 1259 of 4331

NISSAN TIIDA 2009 Service Repair Manual CVT
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DTC P1778 STEP MOTOR - FUNCTION
Description INFOID:0000000004305785
• The step motor is included in the control valve assembly.
• The step motors 4 aspects of ON/OFF change according to

CVT
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DTC P1778 STEP MOTOR - FUNCTION
Description INFOID:0000000004305785
• 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 oper-
ate normally.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004305786
Remarks: Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004305787
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1778 STEP MOTR/FNC” with CO NSULT-III is detected under the following condi-
tions.
- When not changing the pulley ratio according to the instruction of TCM.
Possible Cause INFOID:0000000004305788
Step motor
DTC Confirmation Procedure INFOID:0000000004305789
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-316, " Diagnosis Procedure " .
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 and select “DATA MO NITOR” mode for “TRANSMISSION” with CONSULT-III.
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 (c ool down the fluid)
3. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
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-316, " Diagnosis Procedure " .
WITH GST
Follow the procedure “WITH CONSULT-III”. Item name Condition Display value (Approx.)
STM STEP During driving−
20 step - 180 step
GEAR RATIO 2.56 - 0.43

Page 1260 of 4331

NISSAN TIIDA 2009 Service Repair Manual CONSULT-III Function (TRANSMISSION) " .
Without CONSULT-III
Inspect the engine speed (rise and descend), vehicle speed, throttle position, and check shift change. Refer to
CVT-357, " Vehicle Speed Wh

Page 1261 of 4331

NISSAN TIIDA 2009 Service Repair Manual CVT
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OVERDRIVE CONTROL SWITCH
Description INFOID:0000000004305791
• Overdrive control switch is installed to the selector lever.
• O/D OFF indicator turns ON, and overdrive driving ac

Page 1262 of 4331

NISSAN TIIDA 2009 Service Repair Manual TCM Terminal and Reference Value " .
Diagnosis Procedure INFOID:0000000004305794 B

Page 1263 of 4331

NISSAN TIIDA 2009 Service Repair Manual OVERDRIVE CONTROL SWITCH
CVT-319
< SERVICE INFORMATION >
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Perform the self-diagnosis check. Refer to
CVT-230, " CONSULT-III Functi
on (TRANSMISSION) " .
Is

Page 1264 of 4331

NISSAN TIIDA 2009 Service Repair Manual CVT-320< SERVICE INFORMATION >
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OVERDRIVE CONTROL SWITCH
4. Check continuity between CVT device harness connector termi- nal and ground.
5. If OK, check harness for short to ground and short

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