Nissan Sentra B18 (2020-2025) Service Manual: P0845-00 Transmission Fluid Pressure Sensor/switch a
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
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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:
Vdc Off Indicator Lamp
Component Function Check
Component Function Check
CHECK VDC OFF INDICATOR LAMP
FUNCTION (1)
Check that VDC OFF indicator lamp in combination
meter turns ON for 1 second after ignition switch is placed
ON.
CAUTION:
...
Bcm, Ipdm E/r
List of Ecu Reference
List of ECU Reference
ECU
Reference
BCM
Values on the Diagnosis Tool
...
Information
Information
Service information
Design of combination
meter
TYPE A
TYPE B
...
