Nissan Quest E52. Instruction — part 1219
TM-106
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P0841 TRANSMISSION FLUID PRESSURE SEN/SW A
P0841 TRANSMISSION FLUID PRESSURE SEN/SW A
Description
INFOID:0000000009650169
Detects oil sensor function malfunction based on the mutual relation between primary pressure sensor and
secondary pressure sensor.
DTC Logic
INFOID:0000000009650170
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
CHECK DTC DETECTION
With CONSULT
1.
Start the engine.
2.
Drive the vehicle.
3.
Maintain the following conditions for 5 seconds or more.
4.
Stop the vehicle.
5.
Check DTC.
Is “P0841” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009650171
1.
CHECK LINE PRESSURE
Perform line pressure test. Refer to
.
Is the inspection result normal?
YES
>> .GO TO 2.
NO
>> Repair or replace damaged parts. Refer to
.
2.
CHECK PRIMARY PRESSURE SENSOR SYSTEM
Check primary pressure sensor system. Refer to
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
DTC
Trouble diagnosis name
DTC detection condition
Possible cause
P0841
Transmission Fluid Pressure
Sensor/Switch A Circuit
Range/Performance
Primary pressure sensor value and second-
ary pressure sensor value exceed standard
range and keep the status for 5 seconds or
more
• Harness or connectors
(Secondary pressure sensor circuit is
open or shorted.)
• Harness or connectors
(Primary pressure sensor circuit is open
or shorted.)
• Secondary pressure sensor
• Primary pressure sensor
Vehicle speed
: 30 km/h (17 MPH) or more
P0841 TRANSMISSION FLUID PRESSURE SEN/SW A
TM-107
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
3.
CHECK SECONDARY PRESSURE SENSOR SYSTEM
Check secondary pressure sensor system. Refer to
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK LINE PRESSURE SOLENOID VALVE
1.
Turn ignition switch OFF.
2.
Disconnect the CVT unit connector.
3.
Check the line pressure solenoid valve. Refer to
TM-99, "Component Inspection (Line Pressure Solenoid
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace the transaxle assembly due to malfunction in the line pressure solenoid valve. Refer to
TM-174, "Removal and Installation"
5.
CHECK SECONDARY PRESSURE SOLENOID VALVE
Check the secondary pressure solenoid valve. Refer to
TM-103, "Component Inspection (Secondary Pressure
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace the transaxle assembly due to malfunction in the secondary pressure solenoid valve.
TM-174, "Removal and Installation"
.
6.
CHECK STEP MOTOR SYSTEM
Check the step motor system. Refer to
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace damaged parts.
7.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace the transaxle assembly. Refer to
TM-174, "Removal and Installation"
.
NO
>> Repair or replace damaged parts.
Component Inspection (Line Pressure Solenoid Valve)
INFOID:0000000009650172
1.
CHECK LINE PRESSURE SOLENOID VALVE
Check the resistance between CVT unit connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace the transaxle assembly due to malfunction in the line pressure solenoid valve. Refer to
TM-174, "Removal and Installation"
Component Inspection (Secondary Pressure Solenoid Valve)
INFOID:0000000009650173
1.
CHECK SECONDARY PRESSURE SOLENOID VALVE
CVT unit
—
Condition
Resistance (Approx.)
Terminal
2
Ground
CVT fluid temperature: 20
°
C (68
°
F)
5.60 – 6.60
Ω
CVT fluid temperature: 50
°
C (122
°
F)
6.76 – 6.87
Ω
CVT fluid temperature: 80
°
C (176
°
F)
7.47 – 7.59
Ω
TM-108
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P0841 TRANSMISSION FLUID PRESSURE SEN/SW A
Check the resistance between CVT unit connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace the transaxle assembly due to malfunction in the secondary pressure solenoid valve.
TM-174, "Removal and Installation"
.
CVT unit
—
Condition
Resistance (Approx.)
Terminal
3
Ground
CVT fluid temperature: 20
°
C (68
°
F)
5.60 – 6.60
Ω
CVT fluid temperature: 50
°
C (122
°
F)
6.76 – 6.87
Ω
CVT fluid temperature: 80
°
C (176
°
F)
7.47 – 7.59
Ω
P0845 TRANSMISSION FLUID PRESSURE SEN/SW B
TM-109
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
P0845 TRANSMISSION FLUID PRESSURE SEN/SW B
DTC Logic
INFOID:0000000009650174
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
CHECK DTC DETECTION
With CONSULT
1.
Start the engine.
2.
Warm up the engine. [Set the CVT fluid to
−
19
°
C (
−
4
°
F) or more.]
NOTE:
When the ambient temperature is 20
°
C (68
°
F), the CVT fluid usually increases to 50 to 80
°
C (122 to
176
°
F) with driving in an urban area for approximately 10 minutes.
3.
Wait for 5 seconds or more.
4.
Check DTC.
With GST
Follow the procedure “With CONSULT”.
Is “P0845” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009650175
1.
CHECK TCM INPUT SIGNAL
1.
Start the engine.
2.
Check the voltage between TCM connector terminals.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-42, "Intermittent Incident"
.
NO
>> GO TO 2.
2.
CHECK SENSOR POWER AND SENSOR GROUND
1.
Turn ignition switch OFF.
2.
Check the voltage between TCM connector terminals.
DTC
Trouble diagnosis name
DTC detection condition
Possible cause
P0845
Transmission Fluid Pressure
Sensor/Switch “B” Circuit
When below diagnosis conditions are met, second-
ary pressure sensor value is kept 4.7 V or more or
0.09 V or less for 5 seconds or more
• Diagnosis Condition
- CVT fluid temperature: More than
−
20
°
C (
−
4
°
F)
• Harness or connectors
(Primary pressure sensor circuit is
open or shorted.)
• Primary pressure sensor
TCM
Condition
Voltage (Approx.)
Connector
+
-
Terminal
F23
14
25
“N” position idle
0.7 – 3.5 V
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