ESP NISSAN TEANA 2003 Workshop Manual

CVT-52
TROUBLE DIAGNOSIS

CAN DIAGNOSTIC SUPPORT MONITOR MODE
Operation Procedure
1. Touch “CAN DAIG SUPPORT MNTR” on “SELECT DIAG
MODE” screen. Refer to LAN-44, "
CAN Diagnostic Support
Monitor" .
SPORT MODE IND (ON/OFF) — — Not mounted but displayed.
MMODE IND (ON/OFF) — —
SMCOIL D (ON/OFF) — — Step motor coil “D” energizing status
SMCOIL C (ON/OFF) — — Step motor coil “C” energizing status
SMCOIL B (ON/OFF) — — Step motor coil “B” energizing status
SMCOIL A (ON/OFF) — — Step motor coil “A” energizing status
LUSEL SOL OUT (ON/OFF) — —
REV LAMP (ON/OFF) — X
STRTR RLY OUT (ON/OFF) — — Starter relay
LUSEL SOL MON (ON/OFF) — —
STRTR RLY MON (ON/OFF) — — Starter relay
VDC ON (ON/OFF) X — ESP (Electronic Stability Program)
TCS ON (ON/OFF) X —
ABS ON (ON/OFF) X —
ACC ON (ON/OFF) X — Not mounted but displayed
RANGE — XIndicates position is recognized by TCM. Indi-
cates a specific value required for control when
fail-safe function is activated
M GEAR POS — X
Voltage (V) — —Displays the value measured by the voltage
probe
Frequency (Hz) — —
The value measured by the pulse probe is dis-
played DUTY-HI (high) (%) — —
DUTY-LOW (low) (%) — —
PLS WIDTH-HI (ms) — —
PLS WIDTH-LOW (ms) — —Monitored item (Unit)Monitor item selection
Remarks ECU
INPUT
SIGNALSMAIN SIG-
NALSSELEC-
TION
FROM
MENU
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CVT-86
DTC P0725 ENGINE SPEED SIGNAL

2. CHECK DTC WITH TCM
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “TRANSMISSION” with CONSULT-II. Refer to CVT-47, "
SELF-
DIAGNOSTIC RESULT MODE" .
OK or NG
OK >> GO TO 3.
NG >> Check the DTC detected item. Refer to CVT-47, "
SELF-DIAGNOSTIC RESULT MODE" .

If DTC of CAN communication line is detected, go to CVT-53, "DTC U1000 CAN COMMUNICA-
TION LINE" .
3. CHECK INPUT SIGNALS
With CONSULT-II
1. Start engine.
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
3. While monitoring “ENG SPEED SIG”, check for engine speed
change corresponding to “ACC PEDAL OPEN”.
OK or NG
OK >> GO TO 4.
NG >> Check ignition signal circuit. Refer to EC-735, "
IGNITION SIGNAL" .
4. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to CVT-85, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 5.
5. 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 name Condition Display value
ENG SPEED SIG Engine runningClosely matches the
tachometer reading
ACC PEDAL OPENReleased accelerator
pedal - Fully depressed
accelerator pedal0.0/8 - 8.0/8
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DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
CVT-89
D
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CVT

DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVEPFP:31940
DescriptionBCS001IH

The torque converter clutch solenoid valve is activated by the TCM in response to signals sent from the
vehicle speed and accelerator pedal position sensors. Lock-up piston operation will then be controlled.

Lock-up operation, however, is prohibited when CVT fluid temperature is too low.

When the accelerator pedal is depressed (less than 2/8) in lock-up condition, the engine speed should not
change abruptly. If there is a big jump in engine speed, there is no lock-up.
CONSULT-II Reference ValueBCS001II
Remarks: Specification data are reference values.
On Board Diagnosis LogicBCS001IJ
Diagnostic trouble code “P0740 TCC SOLENOID/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.
Possible CauseBCS001IK

Torque converter clutch solenoid valve

Harness or connectors
(Solenoid circuit is open or shorted.)
DTC Confirmation ProcedureBCS001IL
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, touch “ERASE” on “SELF-DIAG RESULTS” and then perform the following procedure to con-
firm 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 and wait at least 10 consecutive seconds.
3. If DTC is detected, go to CVT-91, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
ISOLT1Lock-up “OFF” 0.0 A
Lock-up “ON” 0.7 A
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DTC P0745 LINE PRESSURE SOLENOID VALVE
CVT-97
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CVT

DTC P0745 LINE PRESSURE SOLENOID VALVEPFP:31940
DescriptionBCS001IV
The pressure control solenoid valve A (line pressure solenoid valve) regulates the oil pump discharge pres-
sure to suit the driving condition in response to a signal sent from the TCM.
CONSULT-II Reference ValueBCS001IW
Remarks: Specification data are reference values.
On Board Diagnosis LogicBCS001IX
Diagnostic trouble code “P0745 L/PRESS SOL/CIRC” with CONSULT-II is detected under the following condi-
tions.

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 CauseBCS001IY

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

Pressure control solenoid valve A (Line pressure solenoid valve)
DTC Confirmation ProcedureBCS001IZ
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 and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
2. Start engine and wait at least 5 seconds.
3. If DTC is detected, go to CVT-99, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
ISOLT2 Release your foot from the accelerator pedal 0.8 A
Press the accelerator pedal all the way down 0.0 A
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CVT-102
DTC P0746 PRESSURE CONTROL SOLENOID A PERFORMANCE (LINE PRES-
SURE SOLENOID VALVE)

DTC P0746 PRESSURE CONTROL SOLENOID A PERFORMANCE (LINE PRES-
SURE SOLENOID VALVE)
PFP:31941
DescriptionBCS001J3
The pressure control solenoid valve A (line pressure solenoid valve) regulates the oil pump discharge pres-
sure to suit the driving condition in response to a signal sent from the TCM.
CONSULT-II Reference ValueBCS001J4
Remarks: Specification data are reference values.
On Board Diagnosis LogicBCS001J5
Diagnostic trouble code “P0746 PRS CNT SOL/A FCTN” with CONSULT-II is detected under the following
conditions.

Unexpected gear ratio was detected in the LOW side due to excessively low line pressure.
Possible CauseBCS001J6

Line pressure control system

Output speed sensor (Secondary speed sensor)

Input speed sensor (Primary speed sensor)
DTC Confirmation ProcedureBCS001J7
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 10 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESULTS” and then perform the following procedure to con-
firm 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 10
consecutive seconds. Test start from 0 km/h (0 MPH).
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-103, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
PRI PRESS “N” position idle 0.3 - 0.7 MPa
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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
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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
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DTC P0868 SECONDARY PRESSURE DOWN
CVT-131
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CVT

DTC P0868 SECONDARY PRESSURE DOWNPFP:31941
DescriptionBCS001KG
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 ValueBCS001KH
Remarks: Specification data are reference values.
On Board Diagnosis LogicBCS001KI
Diagnostic trouble code “P0868 SEC/PRESS DOWN” with CONSULT-II is detected when secondary fluid
pressure is too low compared with the commanded value while driving.
Possible CauseBCS001KJ

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 ProcedureBCS001KK
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 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 and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
2. Make sure that output voltage of CVT fluid 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)
3. Start engine and maintain the following conditions for at least 10
consecutive seconds.
VEHICLE SPEED (accelerate slowly): 0 → 50 km/h (31 MPH)
ACC PEDAL OPEN: 0.5/8 - 1.0/8
RANGE: “D” position
4. If DTC is detected, go to CVT-132, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
SEC PRESS “N” position idle 0.5 MPa
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CVT-152
DTC P1745 LINE PRESSURE CONTROL

DTC P1745 LINE PRESSURE CONTROLPFP:31036
DescriptionBCS001LN
The pressure control solenoid valve A (line pressure solenoid valve) regulates the oil pump discharge pres-
sure to suit the driving condition in response to a signal sent from the TCM.
On Board Diagnosis LogicBCS001LO
Diagnostic trouble code “P1745 L/PRESS CONTROL” with CONSULT-II is detected when TCM detects the
unexpected line pressure.
Possible CauseBCS001LP
TCM
DTC Confirmation ProcedureBCS001LQ
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, touch “ERASE” on “SELF-DIAG RESULTS” and then perform the following procedure to con-
firm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
2. Make sure that output voltage of CVT fluid 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)
3. If DTC is detected, go to CVT-152, "
Diagnostic Procedure" .
Diagnostic ProcedureBCS001LR
1. CHECK DTC
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “TRANSMISSION” with CONSULT-II.
3. Erase self-diagnostic results. Refer to CVT-49, "
How to Erase Self-diagnostic Results" .
4. Turn ignition switch OFF, and wait for 5 seconds or more.
5. Start engine.
6. Confirm self-diagnostic results again. Refer to CVT-47, "
SELF-DIAGNOSTIC RESULT MODE" .
Is the
“P1745 L/PRESS CONTROL” displayed?
YES >> Replace TCM. Refer to CVT-9, "Precautions for TCM and CVT Assembly Replacement" .
NO >>INSPECTION END
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DTC P1777 STEP MOTOR - CIRCUIT
CVT-153
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CVT

DTC P1777 STEP MOTOR - CIRCUITPFP:31020
DescriptionBCS001LS
The step motor changes the step with turning 4 coils ON/OFF according to the signal from TCM. As a result,
the flow of line pressure to primary pulley is changed and pulley ratio is controlled.
CONSULT-II Reference ValueBCS001LT
Remarks: Specification data are reference values.
On Board Diagnosis LogicBCS001LU
Diagnostic trouble code “P1777 STEP MOTR CIRC” with CONSULT-II is detected under the following condi-
tions.

When operating step motor ON and OFF, there is no proper change in the voltage of TCM terminal which
corresponds to it.
Possible CauseBCS001LV

Step motor

Harness or connectors
(Step motor circuit is open or shorted.)
DTC Confirmation ProcedureBCS001LW
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 10 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESULTS” and then perform the following procedure to con-
firm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
2. Drive vehicle for at least 5 consecutive seconds.
3. If DTC is detected, go to CVT-155, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
STM STEP
During driving−20 step - 190 step
SMCOIL A
Changes ON⇔OFF SMCOIL B
SMCOIL C
SMCOIL D
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