Nissan Sentra. Instruction — 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
P0848 TRANSMISSION FLUID PRESSURE SEN/SW B
TM-197
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F11A]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning parts.
2.
CHECK SECONDARY PRESSURE SENSOR SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check continuity between TCM harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning parts.
3.
CHECK TCM INPUT SIGNALS
1. Connect all connectors removed.
2. Start the engine.
3. Check voltage between TCM connector terminal and ground.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-39, "Intermittent Incident"
.
NO
>> There is a malfunction of secondary pressure sensor. Replace transaxle assembly. Refer to
283, "Removal and Installation"
TCM
Continuity
Connector
Terminal
F23
16
Other than 16
Not existed
+
-
Condition
Voltage
TCM
Connector
Terminal
F23
16
Ground
• Selector lever: “N” position
• At idle
0.88 – 0.92 V
TM-198
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F11A]
P0863 TCM COMMUNICATION
P0863 TCM COMMUNICATION
DTC Logic
INFOID:0000000009759438
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
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. Turn ignition switch ON.
2. Check the DTC.
Is “P0863” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009759439
1.
CHECK INTERMITTENT INCIDNT
GI-39, "Intermittent Incident"
Is the inspection result normal?
YES
TM-263, "Removal and Installation"
.
NO
>> Repair or replace malfunctioning parts.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
P0863
TCM COMMUNICATION
(TCM Communication Circuit)
An error is detected at the initial CAN diagnosis of TCM.
TCM
P0890 TCM
TM-199
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F11A]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
P0890 TCM
DTC Logic
INFOID:0000000009759440
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
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 and wait for 5 seconds or more.
2. Check the DTC.
Is “P0890” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009759441
1.
CHECK TCM POWER SUPPLY (BACK-UP) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check voltage between TCM harness connector terminals and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
CHECK INTERMITTENT INCIDENT
GI-39, "Intermittent Incident"
.
Is the inspection result normal?
YES
TM-263, "Removal and Installation"
.
NO
>> Repair or replace malfunctioning parts.
3.
DETECT MALFUNCTIONING ITEMS
Check the following items:
• Open or short circuit of harness between battery positive terminal and TCM connector terminals 45 and 46.
PG-8, "Wiring Diagram — Battery Power Supply —"
.
• 10A fuse (No.25, fuse and fusible link block). Refer to
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
P0890
TCM
(Transmission Control Module
Power Relay Sense Circuit
Low)
The battery voltage supplied to the TCM is
less than 8.4 V continuously for 200 msec or
more under the following diagnosis condition:
• Diagnosis condition
- TCM power supply voltage: More than 11 V
• Harness or connector
(TCM power supply (back-up) circuit is
open or shorted.)
• TCM
+
-
Voltage
TCM
Connector
Terminal
F23
45
Ground
10 – 16 V
46
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