Nissan Maxima. Manual — part 1156
TM-88
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P0841 TRANSMISSION FLUID PRESSURE SEN/SW A
P0841 TRANSMISSION FLUID PRESSURE SEN/SW A
Description
INFOID:0000000010113646
Using the engine load (throttle position), the primary pulley revolution speed, and the secondary pulley revolu-
tion speed as input signals, TCM changes the operating pressure of the primary pulley and the secondary pul-
ley and changes the groove width of the pulley to control the gear ratio.
DTC Logic
INFOID:0000000010113647
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. Turn ignition switch ON.
2. Select “Data Monitor” in “TRANSMISSION”.
3. Start engine and maintain the following conditions for at least 12 consecutive seconds.
Is “P0841” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000010113648
1.
CHECK LINE PRESSURE
Perform line pressure test. Refer to
TM-162, "Inspection and Judgment"
.
Is the inspection result normal?
YES
>> .GO TO 2.
NO
>> Repair or replace damaged parts. Refer to
TM-162, "Inspection and Judgment"
.
2.
CHECK SECONDARY PRESSURE SENSOR SYSTEM
Check secondary pressure sensor system. Refer to
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK PRIMARY PRESSURE SENSOR SYSTEM
Check primary pressure sensor system. Refer to
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0841
Transmission Fluid Pressure
Sensor/Switch A Circuit
Range/Performance
Correlation between the values of the trans-
mission fluid pressure sensor A (secondary
pressure sensor) and the transmission fluid
pressure sensor B (primary pressure sen-
sor) is out of specification.
• Harness or connectors
(Sensor circuit is open or shorted.)
• Secondary pressure sensor
• Primary pressure sensor
VEHICLE SPEED
: 40 km/h (25 MPH) or more
RANGE
: “D” position
P0841 TRANSMISSION FLUID PRESSURE SEN/SW A
TM-89
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
4.
CHECK LINE PRESSURE SOLENOID VALVE
1. Turn ignition switch OFF.
2. Disconnect CVT unit connector.
3. Check line pressure solenoid valve. Refer to
TM-89, "Component Inspection (Line Pressure Solenoid
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace damaged parts.
5.
CHECK SECONDARY PRESSURE SOLENOID VALVE
Check secondary pressure solenoid valve. Refer to
TM-89, "Component Inspection (Secondary Pressure
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace damaged parts.
6.
CHECK STEP MOTOR SYSTEM
Check step motor system. Refer to
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace damaged parts.
7.
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.
Component Inspection (Line Pressure Solenoid Valve)
INFOID:0000000010113649
1.
CHECK LINE PRESSURE SOLENOID VALVE
Check resistance between CVT unit connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace transaxle assembly. Refer to
Component Inspection (Secondary Pressure Solenoid Valve)
INFOID:0000000010113650
1.
CHECK SECONDARY PRESSURE SOLENOID VALVE
Check resistance between CVT unit connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace transaxle assembly. Refer to
CVT unit connector
Ground
Resistance
(Approx.)
Connector
Terminal
F46
2
3.0 – 9.0
Ω
SCIA4686E
CVT unit connector
Ground
Resistance
(Approx.)
Connector
Terminal
F46
3
3.0 – 9.0
Ω
AWDIA0123ZZ
TM-90
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P0845 TRANSMISSION FLUID PRESSURE SEN/SW B
P0845 TRANSMISSION FLUID PRESSURE SEN/SW B
Description
INFOID:0000000010113651
The primary pressure sensor detects primary pressure of CVT and sends a signal to the TCM.
DTC Logic
INFOID:0000000010113652
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 line temperature sensor is within the range below.
4. Start engine and wait for at least 5 consecutive seconds.
With GST
Follow the procedure “With CONSULT”.
Is “P0845” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000010113653
Regarding Wiring Diagram information, refer to
.
1.
CHECK INPUT SIGNAL
1. Start engine.
2. Check voltage between TCM connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 2.
2.
CHECK SENSOR POWER AND SENSOR GROUND
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0845
Transmission Fluid Pressure
Sensor/Switch B Circuit
Signal voltage of the primary pressure sen-
sor is too high or too low while driving.
• Harness or connectors
(Sensor circuit is open or shorted.)
• Primary pressure sensor
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)
TCM connector
Ground
Condition
Voltage
(Approx.)
Connector
Terminal
F15
14
“N” position
idle
0.5 – 0.8 V
AWDIA0137ZZ
P0845 TRANSMISSION FLUID PRESSURE SEN/SW B
TM-91
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
Check voltage between TCM connector terminals.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 5.
3.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (PRIMARY PRESSURE SENSOR) (PART 1)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and CVT unit connector.
3. Check continuity between TCM vehicle side harness connector
terminal and CVT unit vehicle side harness connector terminal.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (PRIMARY PRESSURE SENSOR) (PART 2)
Check continuity between TCM vehicle side harness connector ter-
minal and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace damaged parts.
5.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (SENSOR POWER AND SENSOR GROUND) (PART
1)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and CVT unit connector.
3. Check continuity between TCM vehicle side harness connector
terminal and CVT unit vehicle side harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace damaged parts.
6.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (SENSOR POWER AND SENSOR GROUND) (PART
TCM connector
Voltage
(Approx.)
Connector
Terminal
F15
25
26
4.75 – 5.25 V
AWDIA0132ZZ
TCM vehicle side harness
connector
CVT unit vehicle side harness
connector
Continuity
Connector
Terminal
Connector
Terminal
F15 (A)
14
F46 (B)
25
Existed
AWDIA0138ZZ
TCM vehicle side harness connector
Ground
Continuity
Connector
Terminal
F15
14
Not existed
AWDIA0139ZZ
TCM vehicle side harness con-
nector
CVT unit vehicle side harness
connector
Continuity
Connector
Terminal
Connector
Terminal
F15 (A)
25
F46 (B)
19
Existed
26
20
AWDIA0135ZZ
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