Nissan Altima 2007-2012 Service Manual: P0845 transmission fluid pressure sensor B (pri pressure sensor)
Description
The transmission fluid pressure sensor B (primary pressure sensor) detects primary pressure of CVT and sends TCM the signal.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
NOTE: If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
1.CHECK DTC DETECTION
1. Turn ignition switch ON.
2. Select “DATA MONITOR”.
3. Make sure that output voltage of line temperature sensor is within the range below.
ATF TEMP SEN : 1.0 – 2.0 V
If out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to increase the voltage (cool down the fluid)
4. Start engine and wait for at least 5 consecutive seconds.
Follow the procedure “With CONSULT-III”.
Is “P0845 TR PRS SENS/B CIRC” detected? YES >> Go to TM-166, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".
Diagnosis Procedure
1.CHECK INPUT SIGNAL
1. Start engine.
2. Check voltage between TCM harness connector F16 terminal 14 and ground.
3. Turn ignition switch OFF.
Is the inspection result normal? YES >> GO TO 8.
NO >> GO TO 2.
2.CHECK SENSOR POWER AND SENSOR GROUND
1. Turn ignition switch ON.
2. Check voltage between TCM harness connector F16 terminal 25 and 26.
Is the inspection result normal? YES >> GO TO 3.
NO >> GO TO 5.
3.CHECK HARNESS BETWEEN TCM AND CVT UNIT [TRANSMISSION FLUID PRESSURE SENSOR B (PRIMARY PRESSURE SENSOR)] (PART 1)
1. Turn ignition switch OFF.
2. Disconnect TCM harness connector and CVT unit harness connector.
3. Check continuity between TCM harness connector F16 (A) terminal 14 and CVT unit harness connector F46 (B) terminal 25.
Is the inspection result normal? YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK HARNESS BETWEEN TCM AND CVT UNIT [TRANSMISSION FLUID PRESSURE SENSOR B (PRIMARY PRESSURE SENSOR)] (PART 2)
Check continuity between TCM harness connector F16 terminal 14 and ground.
Is the inspection result normal? YES >> GO TO 7.
NO >> Repair or replace damaged parts.
5.CHECK HARNESS BETWEEN TCM AND CVT UNIT (SENSOR POWER AND SENSOR GROUND) (PART 1)
1. Turn ignition switch OFF.
2. Disconnect TCM harness connector and CVT unit harness connector.
3. Check continuity between TCM harness connector F16 (A) terminal 25, 26 and CVT unit harness connector F46 (B) terminal 19, 20.
Is the inspection result normal? YES >> GO TO 6.
NO >> Repair or replace damaged parts.
6.CHECK HARNESS BETWEEN TCM AND CVT UNIT (SENSOR POWER AND SENSOR GROUND) (PART 2)
Check continuity between TCM harness connector F16 terminal 25, 26 and ground.
Is the inspection result normal? YES >> GO TO 7.
NO >> Repair or replace damaged parts.
7.CHECK TCM
1. Replace same type TCM. Refer to TM-254, "Exploded View".
2. Connect each connector.
3. Perform “DTC CONFIRMATION PROCEDURE”. Refer to TM-166, "DTC Logic".
Is “P0840 TR PRS SENS/A CIRC” detected? YES >> Replace transaxle assembly. Refer to TM-259, "Exploded View".
NO >> Replace TCM. Refer to TM-254, "Exploded View".
8.DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal? YES >> Replace TCM. Refer to TM-254, "Exploded View".
NO >> Repair or replace damaged parts.
P0841 pressure sensor function
Description
Using the engine load (throttle position), the primary pulley revolution
speed, and the secondary pulley revolution
speed as input signal, TCM changes the operating pressure of the pr ...
P0868 secondary pressure down
Description
The pressure control solenoid valve B (secondary pressure solenoid valve)
regulates the secondary pressure
to suit the driving condition in response to a signal sent from the TCM.
DT ...
Other materials:
Audio antenna (sedan)
Location of Antenna
1. In-line connectors M87, M501
2. Audio unit harness
3. Audio unit
4. Satellite antenna
5. Audio antenna feeder
6. Satellite radio antenna feeder
7. Window Antenna
8. Antenna amp.
9. Satellite radio tuner
Window Antenna Repair
ELEMENT CHECK
1. Attach probe circuit ...
Control buttons
The control buttons for the Bluetooth® Hands-
Free Phone System are located on the steering
wheel.
PHONE/SEND
Press the button to initiate
a VR session or answer an incoming
call.
You can also use the button
to interrupt the system feedback
and give a command at once. See
“List ...
Bluetooth® Hands-Free Phone System with Navigation System (if so equipped)
WARNING
● Use a phone after stopping your vehicle
in a safe location. If you have to use a
phone while driving, exercise extreme
caution at all times so full attention may
be given to vehicle operation.
● If you are unable to devote full attention
to vehicle operation while talkin ...