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p0725 Nissan CVT

This document provides the diagnostic trouble code (DTC) logic and confirmation procedure for a P0846 transmission fluid pressure sensor/switch B circuit range/performance error on a 2012 Nissan Versa Sedan. The DTC is set if the secondary pressure sensor value exceeds the target value by more than 0.675 MPa for over 5 seconds under specific operating conditions. The confirmation procedure involves driving at a constant speed and checking for the DTC, then measuring the voltage input to the transmission control module if no DTC is present. If normal, the procedure checks for intermittent issues; if abnormal, the transaxle assembly should be replaced.

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Tito Jonas Mollo Choque
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646 views2 pages

p0725 Nissan CVT

This document provides the diagnostic trouble code (DTC) logic and confirmation procedure for a P0846 transmission fluid pressure sensor/switch B circuit range/performance error on a 2012 Nissan Versa Sedan. The DTC is set if the secondary pressure sensor value exceeds the target value by more than 0.675 MPa for over 5 seconds under specific operating conditions. The confirmation procedure involves driving at a constant speed and checking for the DTC, then measuring the voltage input to the transmission control module if no DTC is present. If normal, the procedure checks for intermittent issues; if abnormal, the transaxle assembly should be replaced.

Uploaded by

Tito Jonas Mollo Choque
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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5/30/2020 Transaxle & transmission > Cvt: re0f11a > Dtc/circuit diagnosis > P0846 transmission fluid pressure

id pressure sen/sw b • 2012 Nissan Versa Sedan…

P0846 TRANSMISSION FLUID PRESSURE SEN/SW B ↻ Report a problem with this article

DTC Logic INFOID:0000000007208308

DTC DETECTION LOGIC

DTC Trouble diagnosis name DTC detection condition Possible causes


The detection conditions continuously for 5
seconds or more under the following diagno-
sis conditions:
• Diagnosis conditions
- Selector lever: “D” position
- The primary pulley speed experienced 306
rpm or more and the secondary pulley
speed experienced 230 rpm or more at
least once.
- Wheel spin is not being detected.
- The rate of change in pulley ratio: Between
−0.09 and +0.09 inclusive
Transmission Fluid Pressure
- Solenoid valve output current: 750 mA or • Secondary pressure sensor
P0846 Sensor/Switch B Circuit
more • Control valve assembly
Range/Performance
- GND short diagnosis of the solenoid valve
circuit is not satisfied.
- TCM power supply voltage: More than 11 V
• Detection conditions
- After the value of “Actual secondary pres-
sure − Target secondary pressure” exceeds
0.675 MPa:
• The rate of change in vehicle speed [km/h
(MPH)]: Between −49 (−30) and +49 (+30)
inclusive
• The rate of change in accelerator pedal an-
gle: Between −1.3/8 and +1.3/8 inclusive

DTC CONFIRMATION PROCEDURE


CAUTION:
Be careful of the driving speed.
1.PREPARATION BEFORE WORK
If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.

>> GO TO 2.
2.CHECK DTC DETECTION
1. Start the engine.
2. Shift the selector lever to “D” position.
3. Drive the vehicle at a constant velocity of 40 km/h (25 MPH) at lease for 10 seconds.
CAUTION:
At the same time, the accelerator pedal angle must be maintained constant.
4. Stop the vehicle.
5. Check the first trip DTC.
Is “P0846”detected?
YES >> Go to TM-173, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000007208309

1.CHECK TCM INPUT SIGNAL


1. Start the engine.
2. Check voltage between TCM connector terminal and ground.

https://www.motologic.com/car/a39073a0b2c0b39ad9e3f4addc481075/article/34757ba2bc75818731211e8d97029612h75?returnPath=%2Fcar%2Fa3… 1/2
5/30/2020 Transaxle & transmission > Cvt: re0f11a > Dtc/circuit diagnosis > P0846 transmission fluid pressure sen/sw b • 2012 Nissan Versa Sedan…

↻
TCM
Ground Condition Voltage
Connector Terminal
• Selector lever: “N” position
F44 16 Ground Approx. 0.88 – 0.92 V
• At idle
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-38, "Intermittent Incident".
NO >> There is a malfunction of secondary pressure sensor value. Replace transaxle assembly. Refer
to TM-249, "Removal and Installation".

https://www.motologic.com/car/a39073a0b2c0b39ad9e3f4addc481075/article/34757ba2bc75818731211e8d97029612h75?returnPath=%2Fcar%2Fa3… 2/2

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