2003 NISSAN TEANA Power

CVT-82
DTC P0720 VEHICLE SPEED SENSOR CVT (SECONDARY SPEED SENSOR)

3. CHECK POWER AND SENSOR GROUND
1. Turn ignition switch OFF.
2. Disconnect the output speed sensor (secondary speed sensor) harness connector.
3. Turn ignition switch ON.
4. Check voltage between output speed sensor (secondary speed
sensor) harness connector terminals.
5. Check voltage between output speed sensor (secondary speed
sensor) harness connector terminal and ground.
6. If OK, check harness for short to ground and short to power.
7. Reinstall any part removed.
OK or NG
OK >> GO TO 4.
NG - 1 >> Battery voltage is not supplied between terminals 1 and
3, terminals 1 and ground.: GO TO 6.
NG - 2 >> Battery voltage is not supplied between terminals 1 and 3 only.: GO TO 7.
4. CHECK HARNESS BETWEEN TCM AND OUTPUT SPEED SENSOR (SECONDARY SPEED SEN-
SOR)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and output speed sensor (secondary speed sensor) harness connector.
3. Check continuity between TCM connector terminal and output
speed sensor (secondary speed sensor) harness connector ter-
minal.
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 open circuit or short to ground or short to power in harness or connectors.
Item Connector Terminal Data (Approx.)
Output speed sensor (Sec-
ondary speed sensor) F48 1 - 3 Battery voltage
SCIA2345E
Item Connector Terminal Data (Approx.)
Output speed sensor (Sec-
ondary speed sensor) F48 3 - ground Battery voltage
SCIA2346E
Item Connector Terminal Continuity
TCM F107 29
Ye s
Output speed sensor (Sec-
ondary speed sensor) F48 2
SCIA1967E

DTC P0720 VEHICLE SPEED SENSOR CVT (SECONDARY SPEED SENSOR)
CVT-83
D
E
F
G
H
I
J
K
L
MA
B
CVT

5. CHECK THE TCM SHORT
Replace same type TCM, perform self-diagnosis check. Erase self-diagnostic results and them drive the vehi-
cle [more than 40 km/h (25 MPH)], perform self-diagnosis check. Refer to CVT-79, "
DTC Confirmation Proce-
dure" .
Is
“P0720 VEH SPD SEN/CIR AT” detected again?
YES >> Replace the transaxle assembly. Refer to CVT-193, "Removal and Installation" .
NO >> Replace TCM. Refer to CVT-9, "
Precautions for TCM and CVT Assembly Replacement" .
6. CHECK HARNESS BETWEEN TCM AND OUTPUT SPEED SENSOR (SECONDARY SPEED SEN-
SOR) (POWER)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and output speed sensor (secondary speed sensor) harness connector.
3. Check continuity between TCM connector terminals and output
speed sensor (secondary speed sensor) harness connector ter-
minal. Refer to CVT-31, "
Circuit Diagram" .
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK >> 10A fuse (No. 83, located in the IPDM E/R) or ignition switch are malfunctioning.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK HARNESS BETWEEN TCM AND OUTPUT SPEED SENSOR (SECONDARY SPEED SEN-
SOR) (SENSOR GROUND)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and output speed sensor (secondary speed sensor) harness connector.
3. Check continuity between TCM connector terminal and output
speed sensor (secondary speed sensor) harness connector ter-
minal.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
Item Connector Terminal Continuity
TCM F106 10
Ye s
Output speed sensor
(Secondary speed sensor) F48 3
TCM F106 19
Ye s
Output speed sensor
(Secondary speed sensor) F48 3
SCIA2369E
Item Connector Terminal Continuity
TCM F107 42
Ye s
Output speed sensor
(Secondary speed sensor) F48 1
SCIA2347E

CVT-92
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE

3. CHECK HARNESS BETWEEN TCM AND TORQUE CONVERTER CLUTCH 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. If OK, check continuity between ground and CVT assembly.
6. Reinstall any part removed.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. 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 5.
NG >> Repair or replace damaged parts.
5. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to CVT-89, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
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 >> Repair or replace damaged parts.
Item Connector Terminal Continuity
TCM F106 3
Ye s
CVT unit harness connector F49 12
SCIA4683E
Solenoid Valve Connector Terminal Resistance
(Approx.)
Torque converter clutch
solenoid valveF49 12 - Ground 3 - 9 Ω
SCIA4684E

CVT-100
DTC P0745 LINE PRESSURE SOLENOID VALVE

2. CHECK PRESSURE CONTROL SOLENOID VALVE A (LINE 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 >> Replace the transaxle assembly. Refer to CVT-193,
"Removal and Installation" .
4. CHECK HARNESS BETWEEN TCM AND PRESSURE CONTROL SOLENOID VALVE A (LINE PRES-
SURE SOLENOID VALVE)
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector and TCM 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. If OK, check continuity between ground and CVT assembly.
6. Reinstall any part removed.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
Solenoid valve Connector TerminalResistance
(Approx.)
Pressure control solenoid
valve A (Line pressure
solenoid valve) F106 1 - ground 3 - 9 Ω
SCIA4685E
Solenoid valve Connector TerminalResistance
(Approx.)
Pressure control sole-
noid valve A (Line pres-
sure solenoid valve) F49 2 - Ground 3 - 9 Ω
SCIA4686E
Item Connector Terminal Continuity
TCM F106 1
Ye s
CVT unit harness connector F49 2
SCIA4687E

CVT-104
DTC P0746 PRESSURE CONTROL SOLENOID A PERFORMANCE (LINE PRES-
SURE SOLENOID VALVE)

4. CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM AND INPUT SPEED
SENSOR (PRIMARY SPEED SENSOR) SYSTEM
Check output speed sensor (secondary speed sensor) system and input speed sensor (primary speed sensor)
system. Refer to CVT-79, "
DTC P0720 VEHICLE SPEED SENSOR CVT (SECONDARY SPEED SENSOR)" ,
CVT-74, "
DTC P0715 INPUT SPEED SENSOR CIRCUIT (PRI SPEED 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.
6. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to CVT-102, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> Replace the transaxle assembly or TCM. Refer to CVT-193, "
Removal and Installation" .

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 P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)
CVT-111
D
E
F
G
H
I
J
K
L
MA
B
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-116
DTC P0826 MANUAL MODE SWITCH CIRCUIT

5. CHECK SELF-DIAGNOSTIC RESULTS (COMBINATION METER)
Perform self-diagnosis check. Refer to DI-13, "
Self-Diagnosis Mode of Combination Meter" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 6.
6. CHECK MANUAL MODE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect CVT device connector and unified meter and A/C amp connector.
3. Check continuity between CVT device harness connector termi-
nals and unified meter and A/C amp harness connector termi-
nals.
4. Check continuity between CVT device harness connector termi-
nal and ground.
5. If OK, check harness for short to ground and short to power.
6. Reinstall any part removed.
OK or NG
OK >> GO TO 7.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
7. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to CVT-113, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 8.
8. 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 >> Repair or replace damaged parts.
Item Connector Terminal Continuity
CVT device harness connector M92 3
Ye s
Unified meter and A/C amp
harness connectorM41 3
CVT device harness connector M92 7
Ye s
Unified meter and A/C amp
harness connectorM41 14
CVT device harness connector M92 8
Ye s
Unified meter and A/C amp
harness connectorM41 4
CVT device harness connector M92 12
Ye s
Unified meter and A/C amp
harness connectorM41 13
SCIA4589E
Item Connector Terminal Continuity
CVT device harness connector M92 11 Yes
SCIA4590E