Nissan Versa Sedan. Instruction - part 868

TM-378

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

P0848 TRANSMISSION FLUID PRESSURE SEN/SW B

P0848 TRANSMISSION FLUID PRESSURE SEN/SW B

DTC Logic

INFOID:0000000009268183

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 

TM-378, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009268184

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.

Is the inspection result normal?

YES 

>> GO TO 2.

DTC

Trouble diagnosis name

DTC detection condition

Possible causes

P0848

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: 

−20°C (−4°F) or 

more

- 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

CVT unit

Ground

Voltage

Connector

Terminal

F46

16

Ground

Approx. 5.0 V

P0848 TRANSMISSION FLUID PRESSURE SEN/SW B

TM-379

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

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 harness connector terminal and ground. 

Is the inspection result normal?

YES 

>> Check intermittent incident. Refer to 

GI-45, "Intermittent Incident"

.

NO

>> There is a malfunction of  secondary pressure sensor. Replace  transaxle assembly. Refer to 

TM-

452, "Removal and Installation"

.

TCM

Continuity

Connector

Terminal

F46

16

Other than 16

Not existed

TCM

Ground

Condition

Voltage

Connector

Terminal

F46

16

Ground

• Selector lever: “N” position
• At idle

Approx. 0.88 – 0.92 V

TM-380

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

P0863 TCM COMMUNICATION

P0863 TCM COMMUNICATION

DTC Logic

INFOID:0000000009268185

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

With CONSULT

1. Turn ignition switch ON.

2. Check the DTC.
Is “P0863” detected?

YES

>> Go to 

TM-380, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009268186

1.

CHECK INTERMITTENT INCIDNT

Refer to 

GI-45, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace  TCM. Refer to 

TM-437, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning parts.

DTC

Trouble diagnosis name

DTC detection condition

Possible causes

P0863

TCM Communication Circuit

An error is detected at the initial CAN diagno-
sis of TCM. 

TCM

P0890 TCM

TM-381

< 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:0000000009268187

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 

TM-381, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009268188

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 

>> Check intermittent incident. Refer to 

GI-45, "Intermittent Incident"

.

NO

>> GO TO 2.

2.

DETECT MALFUNCTIONING ITEMS

Check the following items:

• Open or short circuit of  harness between battery positive terminal and TCM connectors terminals 45 and 46.

• 10A fuse (No.25, fuse and fusible link block). Refer to 

PG-61, "Terminal Arrangement"

.

Is the inspection result normal?

YES 

>> Check intermittent incident. Refer to 

GI-45, "Intermittent Incident"

.

NO

>> Repair or replace  malfunctioning parts.

DTC

Trouble diagnosis name

DTC detection condition

Possible causes

P0890

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

Ground

Voltage

Connector

Terminal

F44

45

Ground

10 – 16 V

46