Nissan Teana J32. Manual — part 1185
TM-264
< COMPONENT DIAGNOSIS >
[CVT: RE0F10A]
P1778 STEP MOTOR - FUNCTION
P1778 STEP MOTOR - FUNCTION
Description
INFOID:0000000003806475
• The step motor changes the step by 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.
• This diagnosis item is detected when the electrical system is OK, but the mechanical system is NG.
• This diagnosis item is detected when the state of the changing of the speed mechanism in the unit does not
operate normally.
DTC Logic
INFOID:0000000003806476
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
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”.
• If hi-geared fixation occurred, go to
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
Perform the following procedure to confirm the malfunction is eliminated after the repair.
1.
CHECK DTC DETECTION
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “Data Monitor” mode for “TRANSMISSION”.
3.
Make sure that output voltage of CVT fluid temperature sensor is within the range specified below.
4.
Start engine and maintain the following conditions for at least 30 consecutive seconds.
With GST.
Follow the procedure “With CONSULT-III”.
Is “P1778 STEP MOTR/FNC” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-35, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000003806477
1.
CHECK STEP MOTOR SYSTEM
DTC
Item
(CONSULT-III screen term)
Malfunction is detected when...
Possible cause
P1778
STEP MOTR/FNC
There is a big difference be-
tween the number of steps for
the stepping motor and for the
actual gear ratio.
Step motor
ATF TEMP SEN
: 1.0 – 2.0 V
If it is 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)
Start test 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
P1778 STEP MOTOR - FUNCTION
TM-265
< COMPONENT DIAGNOSIS >
[CVT: RE0F10A]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
Check step motor system. Refer to
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace damaged parts.
2.
CHECK INPUT SPEED SENSOR (PRIMARY SPEED SENSOR) SYSTEM
Check input speed sensor (primary speed sensor) system. Refer to
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM
Check output speed sensor (secondary speed sensor) system. Refer to
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
NO
>> Repair or replace damaged parts.
TM-266
< COMPONENT DIAGNOSIS >
[CVT: RE0F10A]
SHIFT POSITION INDICATOR CIRCUIT
SHIFT POSITION INDICATOR CIRCUIT
Description
INFOID:0000000003806478
TCM sends position indicator signals to combination meter via CAN communication line.
Component Function Check
INFOID:0000000003806479
1.
CHECK SHIFT POSITION INDICATOR
CAUTION:
Always drive vehicle at a safe speed.
1.
Start engine.
2.
Check that correct selector lever position (“P”, “N”, “R”, “D” or “L”) is displayed as selector lever is moved
into each position.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000003806480
1.
CHECK INPUT SIGNALS
With CONSULT-III
1.
Start engine.
2.
Select “RANGE” on “Data Monitor” mode for “TRANSMISSION” and read out the value.
3.
Check that correct selector lever position (“P”, “N”, “R”, “D” or “L”) is displayed as selector lever is moved
into each position.
Is the inspection result normal?
YES
>> INSPECTION END
NO-1 [The actual gear position does not change, or shifting into the manual mode is not possible (no gear
shifting in the manual mode possible). Or the shift position indicator is not indicated.]>>Check the following.
• Check sport mode switch. Refer to
• Check CVT main system (Fail-safe function actuated).
- Check “Self Diagnostic Results” mode for “TRANSMISSION”.
NO-2 (The actual gear position changes, but the shift position indicator is not indicated.)>>
• Check “Self Diagnostic Results” mode for “TRANSMISSION”.
NO-3 (The actual gear position and the indication on the shift position indicator do not coincide.)>>
• Check “Self Diagnostic Results” mode for “TRANSMISSION”.
NO-4 (Only a specific position or positions is/are not indicated on the shift position indicator.)>>
• Check the combination meter. Refer to
MWI-33, "CONSULT-III Function (METER/M&A)"
.
SHIFT LOCK SYSTEM
TM-267
< COMPONENT DIAGNOSIS >
[CVT: RE0F10A]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
SHIFT LOCK SYSTEM
Description
INFOID:0000000003806481
Wiring Diagram - CVT SHIFT LOCK SYSTEM -
INFOID:0000000003806482
Component
Function
Shift lock solenoid
It operates according to the signal from the stop lamp switch and
moves the lock lever.
Lock lever
It moves according to the operation of the shift lock solenoid and
performs the release of the shift lock.
Detent rod
It links with the selector button and restricts the selector lever
movement.
Park position switch
It detects that the selector lever is in P position.
Key interlock cable and key interlock rod
It transmits the lock lever operation to the slider in the key cylinder.
Shift lock release button
It moves the lock lever forcibly.
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