NISSAN TEANA 2003 Service Manual

DTC P0776 PRESSURE CONTROL SOLENOID B PERFORMANCE (SEC PRES-
SURE SOLENOID VALVE)
CVT-105
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CVT

DTC P0776 PRESSURE CONTROL SOLENOID B PERFORMANCE (SEC PRES-
SURE SOLENOID VALVE)
PFP:31941
DescriptionBCS001J9
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.
CONSULT-II Reference ValueBCS001JA
Remarks: Specification data are reference values.
On Board Diagnosis LogicBCS001JB
Diagnostic trouble code “P0776 PRS CNT SOL/B FCTN” with CONSULT-II is detected when secondary pres-
sure is too high or too low compared with the commanded value while driving.
Possible CauseBCS001JC

Harness or connectors
(Solenoid circuit is open or shorted.)

Pressure control solenoid valve B (Secondary pressure solenoid valve system)

Transmission fluid pressure sensor A (Secondary pressure sensor)

Line pressure control system
DTC Confirmation ProcedureBCS001JD
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 5 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
2. Start engine and maintain the following conditions for at least 30
consecutive seconds.
ATF TEMP SEN: 1.0 - 2.0 V
ACC PEDAL OPEN: More than 1.0/8
RANGE: “D” position
VEHICLE SPEED: 10 km/h (6 MPH) More than
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. If DTC is detected, go to CVT-106, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
SEC PRESS “N” position idle 0.5 MPa
BCIA0031E

CVT-106
DTC P0776 PRESSURE CONTROL SOLENOID B PERFORMANCE (SEC PRES-
SURE SOLENOID VALVE)

Diagnostic ProcedureBCS001JE
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Start engine.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
3. Start vehicle and read out the value of “SEC PRESS”.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2. CHECK LINE PRESSURE
Perform line pressure test. Refer to CVT-33, "
LINE PRESSURE
TEST" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts. Refer to CVT-34,
"Judgement of Line Pressure Test" .
3. DETECT MALFUNCTIONING ITEM
Check the following:

Pressure control solenoid valve B (Secondary pressure solenoid valve). Refer to CVT-112, "Component
Inspection" .

Pressure control solenoid valve A (Line pressure solenoid valve). Refer to CVT-101, "Component Inspec-
tion" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK SECONDARY PRESSURE SENSOR SYSTEM
Check transmission fluid pressure sensor A (secondary pressure sensor) system. Refer to CVT-118, "
DTC
P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC PRESSURE SENSOR)" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5. DETECT MALFUNCTIONING ITEM
Check the following:

Power supply and ground circuit for TCM. Refer to CVT-135, "Wiring Diagram — CVT — POWER" .

The TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
Item name Condition Display value (Approx.)
SEC PRESS “N” position idle 0.5 MPa
SCIA2366E
SAT494G

DTC P0776 PRESSURE CONTROL SOLENOID B PERFORMANCE (SEC PRES-
SURE SOLENOID VALVE)
CVT-107
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CVT

6. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to CVT-105, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> Replace the transaxle assembly. Refer to CVT-193, "
Removal and Installation" .

CVT-108
DTC P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)

DTC P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRESSURE
SOLENOID VALVE)
PFP:31941
DescriptionBCS001JF
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.
CONSULT-II Reference ValueBCS001JG
Remarks: Specification data are reference values.
On Board Diagnosis LogicBCS001JH
Diagnostic trouble code “P0778 PRS CNT SOL/B CIRC” with CONSULT-II is detected under the following con-
ditions.

TCM detects an improper voltage drop when it tries to operate the solenoid valve.

When TCM compares target value with monitor value and detects an irregularity.
Possible CauseBCS001JI

Harness or connectors
(Solenoid circuit is open or shorted.)

Pressure control solenoid valve B (Secondary pressure solenoid valve)
DTC Confirmation ProcedureBCS001JJ
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode for “TRANSMISSION” with
CONSULT-II.
3. Start engine and wait at least 5 seconds.
4. If DTC is detected, go to CVT-110, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
ISOLT3 Secondary pressure low - Secondary pressure high 0.8 - 0.0 A
SOLMON3“N” position idle 0.6 - 0.7 A
When stalled 0.4 - 0.6 A
BCIA0031E

DTC P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)
CVT-109
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CVT

Wiring Diagram — CVT — SECPSVBCS001JK
TCWM0538E

CVT-110
DTC P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)

TCM terminal data are reference values, measured between each terminal and ground.
Diagnostic ProcedureBCS001JL
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Start engine.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
3. Read out the value of “ISOLT3”.
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM connector terminal and ground.
3. Turn ignition switch OFF.
4. Disconnect TCM connector.
5. Check if there is continuity between connector terminal and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
Terminal Wire color Item Condition Data (Approx.)
2W/BPressure control
solenoid valve B
(Secondary pres-
sure solenoid
valve)andRelease your foot from the accelerator pedal. 5.0 - 7.0 V
Press the accelerator pedal all the way down. 3.0 - 4.0 V
Item name Condition Display value (Approx.)
ISOLT3Secondary pressure low -
Secondary pressure high0.8 - 0.0 A
SCIA2349E
Name Connector Terminal ConditionVoltage
(Approx.)
Pressure
control
solenoid
valve B
(Second-
ary pres-
sure
solenoid
valve)F106 2 - groundRelease your foot from
the accelerator pedal.5.0 - 7.0 V
Press the accelerator
pedal all the way down.3.0 - 4.0 V
SCIA4506E

DTC P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)
CVT-111
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CVT

2. CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)
CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check resistance between TCM connector terminal and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 3.
3. CHECK VALVE RESISTANCE
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector.
3. Check resistance between CVT unit harness connector terminal
and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK HARNESS BETWEEN TCM AND PRESSURE CONTROL SOLENOID VALVE B (SECONDARY
PRESSURE SOLENOID VALVE)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and CVT unit harness connector.
3. Check continuity between TCM connector terminal and CVT unit
harness connector terminal.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to CVT-108, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
Solenoid valve Connector TerminalResistance
(Approx.)
Pressure control solenoid
valve B (Secondary pres-
sure solenoid valve)F106 2 - Ground 3 - 9 Ω
SCIA4507E
Solenoid valve Connector TerminalResistance
(Approx.)
Pressure control sole-
noid valve B (Secondary
pressure solenoid valve) F49 3 - Ground 3 - 9 Ω
SCIA4688E
Item Connector Terminal Continuity
TCM connector F106 2
Ye s
CVT unit harness connector F49 3
SCIA4689E

CVT-112
DTC P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)

6. CHECK TCM
1. Check TCM input/output signal. Refer to CVT-40, "
TCM Input/Output Signal Reference Values" .
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>INSPECTION END
NG >> 1. Repair or replace damaged parts.
2. Replace the transaxle assembly. Refer to CVT-193, "
Removal and Installation" .
Component InspectionBCS001JM
PRESSURE CONTROL SORENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector.
3. Check resistance between CVT unit harness connector terminal
and ground.
4. If NG, replace the transaxle assembly. Refer to CVT-193,
"Removal and Installation" .
Solenoid Valve Connector TerminalResistance
(Approx.)
Pressure control sole-
noid valve B (Secondary
pressure solenoid valve) F49 3 - Ground 3 - 9 Ω
SCIA4688E

DTC P0826 MANUAL MODE SWITCH CIRCUIT
CVT-113
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CVT

DTC P0826 MANUAL MODE SWITCH CIRCUITPFP:34901
DescriptionBCS001JN
Manual mode switch is installed in CVT control device. The manual mode switch sends shift up and shift down
switch signals to TCM.
TCM sends the switch signals to unified meter and A/C amp via CAN communication line. Then manual mode
switch position is indicated on the shift position indicator. For inspection, refer to CVT-159, "
Diagnostic Proce-
dure" .
CONSULT-II Reference ValueBCS001JO
On Board Diagnosis LogicBCS001JP
Diagnostic trouble code “P0826 MANUAL MODE SWITCH” with CONSULT-II is detected when TCM monitors
Manual mode, Non manual mode, Up or Down switch signal, and then detects irregular with impossible input
pattern for 1 second or more.
Possible CauseBCS001JQ

Harness or connectors
(These switches circuit is open or shorted.)
(TCM, and unified meter and A/C amp circuit are open or shorted.)
(CAN communication line is open or shorted.)

Manual mode select switch (Built into CVT control device)

Manual mode position select switch (Built into CVT control device)
DTC Confirmation ProcedureBCS001JR
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with
CONSULT-II.
3. Start engine.
4. Move selector lever to “M” position.
5. Drive vehicle for at least 2 consecutive seconds.
6. If DTC is detected, go to CVT-115, "
Diagnostic Procedure" .
Item name Condition Display value
MMODEManual shift gate position (neutral) ON
Other than the above OFF
NON MMODEManual shift gate position (neutral, +side, -side) OFF
Other than the above ON
UPLVRSelector lever: + side ON
Other than the above OFF
DOWNLVRSelector lever: - side ON
Other than the above OFF
BCIA0031E

CVT-114
DTC P0826 MANUAL MODE SWITCH CIRCUIT

Wiring Diagram — CVT — MMSWBCS001JS
TCWM0539E