Nissan Murano Z50 (2003 year). Manual — part 68
DTC P0776 PRESSURE CONTROL SOLENOID B PERFOMANCE (SEC PRES-
SURE SOLENOID VALVE)
CVT-129
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
If the check result is NG, go to “Diagnostic Procedure”,
.
WITH GST
Follow the procedure “With CONSULT-II”.
Diagnostic Procedure
ACS002TE
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
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts. Refer to
CVT-58, "Judgement of Line Pressure Test"
3.
DETECT MALFUNCTIONING ITEM
Check the following:
●
Pressure control solenoid valve B (secondary pressure solenoid valve). Refer to
.
●
Pressure control solenoid valve A (line pressure solenoid valve). Refer to
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace damaged parts.
4.
CHECK SECONDARY PRESSURE SENSOR SYSTEM
Check transmission pressure sensor A (secondary pressure sensor) system. Refer to
TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC PRESSURE SENSOR)"
OK or NG
OK
>> GO TO 5.
NG
>> Repair or replace damaged parts.
SCIA5492E
Monitor item
Condition
Specification (Approximately)
SEC PRESS
N position idle
0.5MPa
SCIA2366E
CVT-130
DTC P0776 PRESSURE CONTROL SOLENOID B PERFOMANCE (SEC PRES-
SURE SOLENOID VALVE)
Revision; 2004 April
2003 Murano
5.
DETECT MALFUNCTIONING ITEM
Check the following:
●
Power supply and ground circuit for TCM.
●
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-128, "DTC Confirmation Procedure"
OK or NG
OK
>> INSPECTION END
NG
>> Replace the transaxle assembly. Refer to
DTC P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)
CVT-131
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
DTC P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRESSURE
SOLENOID VALVE)
PFP:31941
Description
ACS002J9
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.
The secondary pressure duty cycle value is not consistent when the closed throttle position signal is
“ON”. To confirm the secondary pressure duty cycle at low-pressure, the accelerator (throttle) should
be open until the closed throttle position signal is “OFF”.
NOTE:
CONSULT-II screen terms are shown differently depending on the version of CONSULT-II card.
CONSULT-II Reference Value
ACS002TF
Remarks: Specification data are reference values.
On Board Diagnosis Logic
ACS002JA
●
This is an OBD-II self-diagnostic item.
●
Diagnostic trouble code “SEC/PRESS SOL/CIRC” with CONSULT-II or P0778 without CONSULT-II is
detected under the following conditions.
–
When 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 Cause
ACS002JB
●
Harness or connectors
(The solenoid circuit is open or shorted.)
●
Pressure control solenoid valve B (secondary pressure solenoid valve)
DTC Confirmation Procedure
ACS002JC
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.
CVT-133, "Diagnostic Procedure"
WITH GST
Follow the procedure “With CONSULT-II”.
Monitor item
Condition
Specification (Approximately)
ISOLT3
N position idle
0.6 - 0.7A
When stalled
0.4 - 0.6A
SOLMON3
N position idle
0.6 - 0.7A
When stalled
0.4 - 0.6A
SCIA2272E
CVT-132
DTC P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)
Revision; 2004 April
2003 Murano
Wiring Diagram — CVT — SECPSV
ACS002TG
TCWA0152E
DTC P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)
CVT-133
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
Remarks: Specification data are reference values.
Diagnostic Procedure
ACS002TH
1.
CHECK VALVE RESISTANCE
1.
Turn ignition switch “OFF”.
2.
Disconnect CVT unit harness connector.
3.
Check resistance between terminal and ground.
OK or NG
OK >> GO
TO
2.
NG
>> Repair or replace damaged parts.
2.
CHECK POWER SOURCE CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect TCM connector and CVT unit harness connector.
3.
Check continuity between CVT unit harness connector and TCM
connector.
4.
If OK, check harness for short to ground and short to power.
5.
Reinstall any part removed.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
CHECK DTC
Check again.
●
Refer to
CVT-131, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 4.
Terminal
No.
Wire color
Item
Condition
Judgement standard
(Approx.)
2
W/B
Pressure control
solenoid valve B
(secondary pres-
sure solenoid valve)
Release your foot from the accelera-
tor pedal.
5.0 - 7.0V
Press the accelerator pedal all the
way down.
3.0 - 4.0V
Solenoid Valve
Connector No.
Terminal No.
Resistance
(Approx.)
Pressure control sole-
noid valve B (secondary
pressure solenoid valve)
F6
3 - Ground
3.0 - 9.0
Ω
SCIA2032E
Item
Connector No.
Terminal No.
(Wire color)
Continuity
TCM connector
F103
2 (W/B)
Yes
CVT unit harness connector
F6
3 (W/B)
SCIA2033E
CVT-134
DTC P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)
Revision; 2004 April
2003 Murano
4.
CHECK TCM INSPECTION
1.
Perform TCM input/output signal inspection.
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-197, "Removal and Installation"
.
Component Inspection
ACS002TI
PRESSURE CONTROL SORENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)
1.
Turn ignition switch “OFF”.
2.
Disconnect CVT unit harness connector.
3.
Check resistance between terminal and ground.
4.
If NG, replace transaxle assembly. Refer to
.
Solenoid Valve
Connector No.
Terminal No.
Resistance
(Approx.)
Pressure control sole-
noid valve B (secondary
pressure solenoid valve)
F6
3 - Ground
3.0 - 9.0
Ω
SCIA2032E
DTC P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC
PRESSURE SENSOR)
CVT-135
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
DTC P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC
PRESSURE SENSOR)
PFP:31936
Description
ACS002JM
The transmission fluid pressure sensor A (secondary pressure sensor) detects secondary pressure of CVT
and sends TCM the signal.
NOTE:
CONSULT-II screen terms are shown differently depending on the version of CONSULT-II card.
CONSULT-II Reference Value
ACS002TJ
Remarks: Specification data are reference values.
On Board Diagnosis Logic
ACS002TK
●
This is an OBD-II self-diagnostic item.
●
Diagnostic trouble code “SEC PRS SEN/CIRC” with CONSULT-II or P0840 without CONSULT-II is
detected when TCM detects an improper voltage drop when it tries to operate the sensor.
Possible Cause
ACS002JO
●
Transmission fluid pressure sensor A (secondary pressure sensor)
●
Harness or connectors
(The switch circuit is open or shorted.)
DTC Confirmation Procedure
ACS002JP
CAUTION:
●
Always drive vehicle at a safe speed.
●
Be careful not to rev engine into the red zone on the tachometer.
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.
Make sure that output voltage of line temperature sensor is
within the range below.
ATF TEMP SEN: 1 - 2V
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 wait for at least 5 consecutive seconds.
If the check result is NG, go to “Diagnostic Procedure”,
.
WITH GST
Follow the procedure “With CONSULT-II”.
Monitor item
Condition
Specification (Approximately)
SEC HYDR SEN
N position idle
0.8V
SEC PRS
During driving [40km/h (25 MPH)]
0.4MPa
SCIA2272E
CVT-136
DTC P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC
PRESSURE SENSOR)
Revision; 2004 April
2003 Murano
Wiring Diagram - CVT - SECPS
ACS002TL
TCWA0155E
DTC P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC
PRESSURE SENSOR)
CVT-137
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
Remarks: Specification data are reference values.
Diagnostic Procedure
ACS002JQ
1.
CHECK INPUT SIGNAL
With CONSULT-II
1.
Start engine.
2.
Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
3.
Start vehicle and read out the value of “SEC HYDR SEN”.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 2.
2.
CHECK SENSOR POWER AND SENSOR GROUND
1.
Turn ignition switch “ON”. (Do not start engine)
2.
Check voltage between TCM connector 46 and 42.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
Terminal
No.
Wire color
Item
Condition
Judgement standard
(Approx.)
37
V/W
Transmission fluid
pressure sensor A
(secondary pressure
sensor)
N position idle
0.8V
SCIA2279E
Item
Connector No.
Terminal No.
(Wire color)
Data (Approx.)
TCM connector
F104
46 (L/O) - 42 (W/R)
5V
SCIA2367E
CVT-138
DTC P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC
PRESSURE SENSOR)
Revision; 2004 April
2003 Murano
3.
CHECK THE HARNESS BETWEEN TCM AND CVT UNIT HARNESS CONNECTOR (SENSOR POWER
AND SENSOR GROUND)
1.
Turn ignition switch “OFF”.
2.
Disconnect the TCM connector and CVT unit harness connector.
3.
Check continuity between TCM connector and CVT unit harness
connector.
4.
If OK, check harness for short to ground and short power.
5.
Reinstall any part removed.
OK or NG
OK
>> Replace the TCM. Refer to
CVT-8, "Precautions for TCM and CVT Assembly Replacement"
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK TRANSMISSION FLUID PRESSURE SENSOR A (SECONDARY PRESSURE SENSOR) CIR-
CUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect TCM connector and CVT unit harness connector.
3.
Check continuity between CVT unit harness connector and TCM
connector.
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.
5.
CHECK DTC
Perform DTC Confirmation Procedure.
●
Refer to
CVT-135, "DTC Confirmation Procedure"
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 5.
Item
Connector No.
Terminal No.
(Wire color)
Continuity
TCM
F104
42 (W/R)
Yes
CVT unit harness connector
F6
19 (W/R)
Item
Connector No.
Terminal No.
(Wire color)
Continuity
TCM
F104
46 (L/O)
Yes
CVT unit harness connector
F6
20 (L/O)
SCIA2340E
Item
Connector No.
Terminal No.
(Wire color)
Continuity
TCM
F104
37 (V/W)
Yes
CVT unit harness connector
F6
23 (V/W)
SCIA2368E
DTC P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC
PRESSURE SENSOR)
CVT-139
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
6.
PERFORM TCM INSPECTION
1.
Perform TCM input/output signal inspection.
2.
If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK
>> Replace the transaxle assembly. Refer to
CVT-197, "Removal and Installation"
.
NG
>> Repair or replace damaged parts.
CVT-140
DTC P0841 PRESSURE SENSOR FUNCTION
Revision; 2004 April
2003 Murano
DTC P0841 PRESSURE SENSOR FUNCTION
PFP:31936
Description
ACS002TM
Using the engine load (throttle position), the primary pulley revolution speed, and the secondary pulley revolu-
tion speed as input signal, change the operating pressure of the primary pulley and the secondary pulley and
change the groove width of the pulley to control the gear ratio.
CONSULT-II Reference Value
ACS002TN
Remarks: Specification data are reference values.
On Board Diagnosis Logic
ACS002JS
●
This is not an OBD-II self-diagnostic item.
●
Diagnostic trouble code “PRESS SEN/FNCTN” with CONSULT-II is detected when correlation between
the values of the secondary pressure sensor and the primary pressure sensor is out of specification.
Possible Cause
ACS002JT
●
Transmission pressure sensor A (secondary pressure sensor)
●
Transmission pressure sensor B (primary pressure sensor)
●
Harness or connectors
(The sensor circuit is open or shorted.)
DTC Confirmation Procedure
ACS002TO
CAUTION:
●
Always drive vehicle at a safe speed.
●
Be careful not to rev engine into the red zone on the tachometer.
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 12
consecutive seconds.
VHCL SPEED: 40 km/h (25 MPH) More than
Selector lever: D position
Monitor item
Condition
Specification (Approximately)
PRI HYDR SEN
N position idle
0.7V - 1.2V
During driving [40km/h (25 MPH)]
1.0V
SEC HYDR SEN
N position idle
0.8V
During driving
0.7V
SCIA2272E
DTC P0841 PRESSURE SENSOR FUNCTION
CVT-141
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
If the check result is NG, go to “Diagnostic Procedure”,
.
Diagnostic Procedure
ACS002TP
1.
CHECK CAN COMMUNICATION CIRCUIT
Perform the self-diagnosis.
Is any malfunction of the “CAN COMM CIRCUIT” indicated?
YES
>> Refer to
CVT-76, "DTC U1000 CAN COMMUNICATION LINE"
NO
>> GO TO 2.
2.
CHECK INPUT SIGNAL (WITH CONSULT-II)
With CONSULT-II
1.
Start engine.
2.
Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
3.
Start vehicle and read out the value of “SEC HYDR SEN” and
“PRI HYDR SEN”.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 4.
3.
CHECK INPUT SIGNAL (WITHOUT CONSULT-II)
Without CONSULT-II
1.
Start engine.
2.
Check voltage between TCM connector and ground.
OK or NG
OK >> GO
TO
7.
NG
>> GO TO 4.
SCIA5492E
Monitor item
Condition
Specification
(Approximately)
PRI HYDR SEN
N position idle
0.7V - 1.2V
During driving [40km/h (25 MPH)]
1.0V
SEC HYDR SEN
N position idle
0.8V
During driving
0.7V
SCIA2277E
Name
Connector
No.
Terminal
No.
Condition
Voltage
(Approx.)
Transmission pressure
sensor B (primary pres-
sure sensor)
F104
41 (V/O) -
ground
“ N” position
idle
0.7 - 1.2V
Transmission pressure
sensor A (secondary
pressure sensor)
37 (V/W) -
ground
0.8V
SCIA1943E
CVT-142
DTC P0841 PRESSURE SENSOR FUNCTION
Revision; 2004 April
2003 Murano
4.
CHECK LINE PRESSURE
Perform line pressure test. Refer to
OK or NG
OK
>> GO TO 5.
NG
>> Repair or replace damaged parts. Refer to
CVT-58, "Judgement of Line Pressure Test"
5.
CHECK TRANSMISSION PRESSORE SENSOR A (SECONDARY PRESSURE SENSOR) SYSTEM
AND TRANSMISSION PRESSURE SENSOR B (PRIMARY PRESSURE SENSOR) SYSTEM
Check secondary pressure sensor system and primary pressure sensor system. Refer to
P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC PRESSURE SENSOR)"
"DTC P0845 TRANSMISSION FLUID PRESSURE SENSOR B CIRCUIT (PRI PRESSURE SENSOR)"
OK or NG
OK
>> GO TO 6.
NG
>> Repair or replace damaged parts.
6.
DETECT MALFUNCTIONING ITEM
Check the following:
●
Line pressure solenoid valve. Refer to
CVT-124, "Component Inspection"
.
●
Secondary pressure solenoid valve. Refer to
CVT-134, "Component Inspection"
●
Step motor. Refer to
CVT-172, "Component Inspection"
OK or NG
OK
>> GO TO 7.
NG
>> Repair or replace damaged parts.
7.
CHECK DTC
Perform DTC Confirmation Procedure.
●
Refer to
CVT-140, "DTC Confirmation Procedure"
OK or NG
OK
>> INSPECTION END
NG
>> Replace the TCM or transaxle assembly. Refer to
DTC P0845 TRANSMISSION FLUID PRESSURE SENSOR B CIRCUIT (PRI
PRESSURE SENSOR)
CVT-143
D
E
F
G
H
I
J
K
L
M
A
B
CVT
Revision; 2004 April
2003 Murano
DTC P0845 TRANSMISSION FLUID PRESSURE SENSOR B CIRCUIT (PRI PRES-
SURE SENSOR)
PFP:31936
Description
ACS002TQ
The primary pressure sensor detects primary pressure of CVT and sends TCM the signal.
NOTE:
CONSULT-II screen terms are shown differently depending on the version of CONSULT-II card.
CONSULT-II Reference Value
ACS002TR
Remarks: Specification data are reference values.
On Board Diagnosis Logic
ACS002TS
●
This is an OBD-II self-diagnostic item.
●
Diagnostic trouble code “PRI PRS SEN/CIRC” with CONSULT-II or P0845 without CONSULT-II is
detected under the following conditions.
–
When TCM detects an improper voltage drop when it tries to operate the sensor.
–
When TCM compares target value with monitor value and detects an irregularity.
Possible Cause
ACS002TT
●
Transmission fluid pressure sensor B (primary pressure sensor)
●
Harness or connectors
(The sensor circuit is open or shorted.)
DTC Confirmation Procedure
ACS002TU
CAUTION:
●
Always drive vehicle at a safe speed.
●
Be careful not to rev engine into the red zone on the tachometer.
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.
Make sure that output voltage of line temperature sensor is
within the range below.
ATF TEMP SEN: 1 - 2V
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 wait for at least 5 consecutive seconds.
If the check result is NG, go to “Diagnostic Procedure”,
.
WITH GST
Follow the procedure “With CONSULT-II”.
Monitor item
Condition
Specification (Approximately)
PRI HYDR SEN
N position idle
0.7 - 1.2V
During driving [40 km/h (25 MPH)]
1.0V
SCIA2272E
CVT-144
DTC P0845 TRANSMISSION FLUID PRESSURE SENSOR B CIRCUIT (PRI
PRESSURE SENSOR)
Revision; 2004 April
2003 Murano
Wiring Diagram - CVT - PRIPS
ACS002TV
TCWA0157E
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