Nissan Maxima. Instruction — part 1161
TM-108
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P1745 LINE PRESSURE CONTROL
P1745 LINE PRESSURE CONTROL
Description
INFOID:0000000010113681
The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in
response to a signal sent from the TCM.
DTC Logic
INFOID:0000000010113682
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
1.
CHECK DTC DETECTION
With CONSULT
1. Turn ignition switch ON
2. Select “Data Monitor” in “TRANSMISSION”.
3. Check that output voltage of CVT fluid temperature sensor is within the range below.
Is “P1745” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000010113683
1.
CHECK DTC
With CONSULT
1. Start engine.
2. Perform “Self Diagnostic Results” in “TRANSMISSION”.
Is “P1745” detected?
YES
>> Replace TCM. Refer to
NO
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P1745
Line Pressure Control Circuit TCM detects the unexpected line pressure.
TCM
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)
P1777 STEP MOTOR
TM-109
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
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P1777 STEP MOTOR
Description
INFOID:0000000010113684
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.
DTC Logic
INFOID:0000000010113685
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
1.
CHECK DTC DETECTION
With CONSULT
1. Start engine.
2. Drive vehicle for at least 5 consecutive seconds.
3. Perform “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT”.
Is “P1777” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000010113686
Regarding Wiring Diagram information, refer to
.
1.
CHECK STEP MOTOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check resistance between TCM vehicle side harness connector
terminals.
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P1777
Step Motor Circuit
Each coil of the step motor is not energized
properly due to an open or a short.
• Harness or connectors
(Step motor circuit is open or shorted.)
• Step motor
TCM vehicle side harness connector
Resistance
(Approx.)
Connector
Terminal
F15
27
28
30.0
Ω
29
30
AWDIA0148ZZ
TM-110
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P1777 STEP MOTOR
4. Check resistance between TCM vehicle side harness connector
terminals and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 2.
2.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (STEP MOTOR) (PART 1)
1. Disconnect CVT unit connector.
2. Check continuity between TCM vehicle side harness connector
terminals and CVT unit vehicle side harness connector termi-
nals.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (STEP MOTOR) (PART 2)
Check continuity between TCM vehicle side harness connector ter-
minals and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK STEP MOTOR
Check step motor. Refer to
TM-111, "Component Inspection (Step Motor)"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace transaxle assembly. Refer to
5.
DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
TCM vehicle side harness connector
Ground
Resistance
(Approx.)
Connector
Terminal
F15
27
15.0
Ω
28
29
30
AWDIA0149ZZ
TCM vehicle side harness
connector
CVT unit vehicle side harness
connector
Continuity
Connector
Terminal
Connector
Terminal
F15 (A)
27
F46 (B)
9
Existed
28
8
29
7
30
6
AWDIA0150ZZ
TCM vehicle side harness connector
Ground
Continuity
Connector
Terminal
F15
27
Not existed
28
29
30
AWDIA0149ZZ
P1777 STEP MOTOR
TM-111
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
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Is the inspection result normal?
YES
NO
>> Repair or replace damaged parts.
Component Inspection (Step Motor)
INFOID:0000000010113687
1.
CHECK STEP MOTOR
1. Check resistance between CVT unit connector terminals.
2. Check resistance between CVT unit connector terminals and
ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace transaxle assembly. Refer to
CVT unit connector
Resistance
(Approx.)
Connector
Terminals
F46
6
7
30.0
Ω
8
9
AWDIA0151ZZ
CVT unit connector
Ground
Resistance
(Approx.)
Connector
terminal
F46
6
15.0
Ω
7
8
9
AWDIA0152ZZ
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