Nissan Altima 2007-2012 Service Manual: P0778 pressure control solenoid B electrical (sec pressure solenoid valve)
Description
The pressure control solenoid valve B (secondary pressure solenoid valve) regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the TCM.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION: Always drive vehicle at a safe speed. 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. Start engine.
2. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
3. Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.
Follow the procedure “With CONSULT-III”.
Is “P0778 PRS CNT SOL/B CIRC” detected? YES >> Go to TM-336, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".
Diagnosis Procedure
1.CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TCM harness connector.
3. Check resistance between TCM harness connector F16 terminal 39 and ground.
Is the inspection result normal? YES >> GO TO 5.
NO >> GO TO 2.
2.CHECK HARNESS BETWEEN TCM AND CVT UNIT [PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)] (PART 1)
1. Disconnect CVT unit harness connector.
2. Check continuity between TCM harness connector F16 (A) terminal 39 and CVT unit harness connector F46 (B) terminal 3.
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK HARNESS BETWEEN TCM AND CVT UNIT [PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)] (PART 2)
Check continuity between TCM harness connector F16 terminal 39 and ground.
Is the inspection result normal? YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)
Check pressure control solenoid valve B (secondary pressure solenoid valve). Refer to TM-337, "Component Inspection [Pressure Control Solenoid Valve B (Secondary Pressure Solenoid Valve)]".
Is the inspection result normal? YES >> GO TO 5.
NO >> Replace transaxle assembly. Refer to TM-447, "Exploded View".
5.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-430, "Exploded View".
NO >> Repair or replace damaged parts.
Component Inspection [Pressure Control Solenoid Valve B (Secondary Pressure Solenoid Valve)]
1.CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)
Check resistance between CVT unit terminal 3 and ground.
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace transaxle assembly. Refer to TM-447, "Exploded View".
P0776 pressure control solenoid B
performance (sec pressure solenoid
valve)
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.
DTC ...
P0826 manual mode switch
Description
Manual mode switch is installed in shift control device. The manual mode
switch sends shift up and shift down
switch signals to TCM with CAN communication.
TCM sends the switch sig ...
Other materials:
Transaxle assembly
Exploded View
CASE AND HOUSING
1. Differential side oil seal
2. Clutch housing
3. Input shaft oil seal
4. Oil channel
5. Oil gutter A
6. Back-up lamp switch
7. Plunger
8. Gasket
9. Plug
10. Bore plug
11. Striking rod oil seal
12. Transaxle case
13. Oil gutter B
14. Air breather tube ...
Heater operation
Heating
This mode is used to direct heated air to the foot
outlets. Some air also flows from the defrost
outlets and the side vent outlets.
1. Press the button to the OFF
position
for normal heating.
2. Press the air flow control
button.
3. Turn the fan control dial to the desired ...
Daytime running light system (Canada only)
The headlights automatically illuminate at a reduced
intensity when the engine is started with
the parking brake released. The daytime running
lights operate with the headlight switch in the
OFF position or in the position.
Turn the
headlight switch to the position
for full
illumination ...