Nissan Sentra B18 (2020-2025) Service Manual: P0845-00 Transmission Fluid Pressure Sensor/switch a
Dtc Description
DTC Description
DTC DETECTION LOGIC
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DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition |
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P0845 |
00 |
FLUID PRESS SEN/SW A (Transmission Fluid Pressure Sensor/Switch "A" Circuit) |
Diagnosis condition |
Diagnosis is permitted when all of the following conditions are satisfied: a) CVT fluid temperature: 60 °C (140 °F) - 120 °C (248 °F) b) Except N and P range c) Nissan Sentra Vehicle speed ≦ 3 km/h (2 MPH) |
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Signal |
Secondary pressure sensor signal |
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Threshold |
DTC is detected when one of the following conditions "a" and "b" are satisfied: a) Fluid pressure drop judgement "a-1" or "a-2" a-1) Secondary pressure sensor voltage < 0.367 V a-2) Secondary pressure sensor voltage > 0.633 V b) Ignition switch: OFF |
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Diagnosis detection time |
0.5 second |
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POSSIBLE CAUSE
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Harness or connector
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Secondary pressure sensor
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Control valve
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Secondary pressure solenoid valve
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TCM
FAIL-SAFE
Stop/start system prohibited
DTC CONFIRMATION PROCEDURE
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PREPARATION BEFORE WORK
If another "DTC CONFIRMATION PROCEDURE" occurs just before, ignition switch OFF and wait for at least 10 seconds, then perform the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V.
>>GO TO 2.
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CHECK DTC DETECTION
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Start the engine.
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Warm up the CVT fluid temperature.
CVT fluid temperature
: 40 °C (104 °F) - 120 °C (248 °F)
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Ignition switch OFF and wait for at least 10 second.
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Ignition switch ON.
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Check the DTC.
Is "P0845-00" detected?
YES >>Proceed to Diagnosis Procedure.
NO-1>>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO-2>>Confirmation after repair: INSPECTION END
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Diagnosis Procedure
Diagnosis Procedure
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INSPECT CVT STEEL BELT
Inspect the CVT steel belt. Refer to Component Inspection.
Is CVT steel belt OK?
YES >>GO TO 2.
NO >>GO TO 4.
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CHECK CIRCUIT FOR SECONDARY PRESSURE SENSOR AND SECONDARY PRESSURE SOLENOID VALVE - 1
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Disconnect TCM harness connector.
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Disconnect CVT unit harness connector.
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Check resistance between TCM harness connector terminal and CVT unit harness connector terminal.
Circuit
TCM
CVT unit
Resistance
Connector
Terminal
Connector
Terminal
Secondary pressure sensor
F23
16
F46
14
1 Ω or less
Secondary pressure solenoid valve
39
3
Is the inspection result normal?
YES >>GO TO 3.
NO >>Repair harness or connector.
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REPLACE CONTROL VALVE
Replace control valve. Refer to Removal and Installation.
>>GO TO 6.
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CHECK CIRCUIT FOR SECONDARY PRESSURE SENSOR AND SECONDARY PRESSURE SOLENOID VALVE - 2
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Disconnect TCM harness connector.
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Disconnect CVT unit harness connector.
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Check resistance between TCM harness connector terminal and CVT unit harness connector terminal.
Circuit
TCM
CVT unit
Resistance
Connector
Terminal
Connector
Terminal
Secondary pressure sensor
F23
16
F46
14
1 Ω or less
Secondary pressure solenoid valve
39
3
Is the inspection result normal?
YES >>GO TO 5.
NO-1>>Repair harness or connector.
NO-2>>GO TO 5.
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REPLACE BELT AND PULLEYS
Replace belt and pulleys. Refer to Disassembly and Assembly.
>>GO TO 6.
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CHECK DTC DETECTION
Perform DTC confirmation procedure. Refer to DTC Description.
Is "P0845-00" detected again?
YES >>Replace TCM. Refer to Removal and Installation.
NO >>INSPECTION END
Other materials:
Steering wheel
WARNING
Do not adjust the steering wheel while driving. Doing so may cause you
to lose control of your Nissan Sentra and could result in an accident.
Do not position the steering wheel closer to you than necessary for proper
steering control and driving comfort.
The driver’s air bag ...
Active Grille Shutter
Component Inspection
Component Inspection
CHECK ACTIVE GRILLE SHUTTER
With CONSULT
Start the engine.
Select “ACTIVE GRILLE
SHUTTER” in “ACTIVE TEST” mode of
“ENGINE” using CONSULT.
...
Sunload Sensor
Diagnosis Procedure
Diagnosis Procedure
CHECK SUNLOAD SENSOR SIGNAL
Ignition switch ON.
Check voltage between A/C auto amp. harness connector.
...