Nissan Murano Z51. Instruction — part 1432
P0845 TRANSMISSION FLUID PRESSURE SEN/SW B
TM-79
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
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P0845 TRANSMISSION FLUID PRESSURE SEN/SW B
Description
INFOID:0000000005514026
The primary pressure sensor detects primary pressure of CVT and sends a signal to the TCM.
DTC Logic
INFOID:0000000005514027
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-III
1.
Turn ignition switch ON.
2.
Select “Data Monitor” in “TRANSMISSION”.
3.
Make sure 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-III”.
Is “P0845” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-39, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000005514028
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
Check voltage between TCM connector terminals.
Is the inspection result normal?
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0845
Transmission Fluid Pressure
Sensor/Switch B Circuit
Signal voltage of the transmission fluid pres-
sure sensor B (primary pressure sensor) 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
F23
14
“N” position idle
0.5 – 0.8 V
TCM connector
Voltage (Approx.)
Connector
Terminal
F23
25
26
4.75 – 5.25 V
TM-80
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P0845 TRANSMISSION FLUID PRESSURE SEN/SW B
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 har-
ness 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 terminal 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 har-
ness 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
2)
Check continuity between TCM vehicle side harness connector terminals and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace damaged parts.
7.
CHECK TCM
TCM vehicle side harness connector
CVT unit vehicle side harness connector
Continuity
Connector
Terminal
Connector
Terminal
F23
14
F24
25
Existed
TCM vehicle side harness connector
Ground
Continuity
Connector
Terminal
F23
14
Not existed
TCM vehicle side harness connector
CVT unit vehicle side harness connector
Continuity
Connector
Terminal
Connector
Terminal
F23
25
F24
19
Existed
26
20
TCM vehicle side harness connector
Ground
Continuity
Connector
Terminal
F23
25
Not existed
26
P0845 TRANSMISSION FLUID PRESSURE SEN/SW B
TM-81
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
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H
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K
L
M
A
B
TM
N
O
P
1.
Replace with the same type of TCM. Refer to
.
2.
Connect each connector.
3.
Perform “DTC CONFIRMATION PROCEDURE”. Refer to
.
Is “P0845” detected?
YES
>> Replace transaxle assembly. Refer to
NO
8.
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-82
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P0868 TRANSMISSION FLUID PRESSURE
P0868 TRANSMISSION FLUID PRESSURE
Description
INFOID:0000000005514029
The secondary pressure solenoid valve regulates the secondary pressure to suit the driving condition in
response to a signal sent from the TCM.
DTC Logic
INFOID:0000000005514030
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-III
1.
Turn ignition switch ON.
2.
Select “Data Monitor” in “TRANSMISSION”.
3.
Make sure that output voltage of CVT fluid temperature sensor is within the range below.
4.
Start engine and maintain the following conditions for at least 10 consecutive seconds.
Is “P0868” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-39, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000005514031
1.
CHECK LINE PRESSURE
Perform line pressure test. Refer to
TM-153, "Inspection and Judgment"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace damaged parts. Refer to
TM-153, "Inspection and Judgment"
.
2.
CHECK SECONDARY PRESSURE SOLENOID VALVE
1.
Turn ignition switch OFF.
2.
Disconnect CVT unit connector.
3.
Check secondary pressure solenoid valve. Refer to
TM-83, "Component Inspection (Secondary Pressure
.
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0868
Transmission Fluid Pressure
Low
Secondary fluid pressure is too low com-
pared with the commanded value while driv-
ing.
• Harness or connectors
(Solenoid circuit is open or shorted.)
• Secondary pressure solenoid valve sys-
tem
• Secondary pressure sensor
• Line pressure control system
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)
VEHICLE SPEED (accelerate slow-
ly)
: 0
→
50 km/h (31 MPH)
ACC PEDAL OPEN
: 0.5/8 – 1.0/8
RANGE
: “D” position
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