Nissan Sentra. Manual - part 890
TM-196
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F11A]
P0848 TRANSMISSION FLUID PRESSURE SEN/SW B
P0848 TRANSMISSION FLUID PRESSURE SEN/SW B
DTC Logic
INFOID:0000000009759436
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PREPARATION BEFORE WORK
If another “DTC CONFIRMATION PROCEDURE” occurs just before, the ignition switch OFF and wait for at
least 10 seconds, then perform the next test.
>> GO TO 2.
2.
CHECK DTC DETECTION
With CONSULT
1. Start the engine.
2. Select “Data Monitor” in “TRANSMISSION”.
3. Select “FLUID TEMP”.
4. Maintain the following conditions for 10 seconds or more.
5. Check the first trip DTC.
With GST
1. Start the engine and wait for at least 10 seconds.
CAUTION:
When the ambient temperature is
−20°C (−4°F) or less and the engine is cold, warm up the engine
for approximately 5 minutes.
2. Check the first trip DTC.
Is “P0848”detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009759437
1.
CHECK SECONDARY PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect CVT unit connector.
3. Turn ignition switch ON.
4. Check voltage between CVT unit harness connector terminal and ground.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
P0848
TRANSMISSION FLUID
PRESSURE SEN/SW B
(Transmission Fluid Pressure
Sensor/Switch B Circuit Low)
The secondary pressure sensor voltage is 4.7
V or more continuously for 5 seconds or more
under the following diagnosis conditions:
• Diagnosis conditions
- CVT fluid temperature: More than
−20°C (−
4
°F)
- Secondary pressure target value: 5.7 MPa
or less
- TCM power supply voltage: More than 11 V
• Harness or connector
(Secondary pressure sensor circuit is
shorted to power supply)
• Secondary pressure sensor
• Control valve assembly
FLUID TEMP
:
−19°C (−2.2°F) or more
+
-
Voltage
(Approx.)
TCM
Connector
Terminal
F46
16
Ground
5.0 V