2008 NISSAN TIIDA PN switch

DTC P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC
PRESSURE SENSOR)
CVT-111
< SERVICE INFORMATION >
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Diagnosis ProcedureINFOID:0000000001703579
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start vehicle and read out the value of “SEC HYDR SEN”.
Without CONSULT-III
1. Start engine.
2. Check voltage between TCM connector terminal and ground.
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 terminals.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK HARNESS BETWEEN TCM AND CVT UNIT HARNESS CONNECTOR (SENSOR POWER AND
SENSOR GROUND)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and CVT unit harness connector.
3. Check continuity between TCM connector terminals and CVT
unit harness connector terminals.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
Item name Condition Display value (Approx.)
SEC HYDR SEN “N” position idle 1.0 V
Name Connector Terminal ConditionVoltage
(Approx.)
Transmission
fluid pressure
sensor A
(Secondary
pressure sen-
sor)E32 37 - Ground “N” position idle 1.0 V
SCIA4508E
Item Connector TerminalData (Ap-
prox.)
TCM connector E32 46 - 42 5.0 V
SCIA2367E
Item Connector Terminal Continuity
TCM E32 42
Ye s
CVT unit harness connector F46 19
TCM E32 46
Ye s
CVT unit harness connector F46 20
SCIA4681E

CVT-112
< SERVICE INFORMATION >
DTC P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC
PRESSURE SENSOR)
OK >> Replace TCM. Refer to CVT-8, "Service After Replacing TCM and Transaxle Assembly" .
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK HARNESS BETWEEN TCM AND TRANSMISSION FLUID PRESSURE SENSOR A (SECOND-
ARY PRESSURE SENSOR)
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 open circuit or short to ground or short to power
in harness or connectors.
5.CHECK DTC
Perform CVT-109, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
6.CHECK TCM
1. Check TCM input/output signals. Refer to CVT-45, "
TCM Terminal and Reference Value" .
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-178, "Removal and Installation" .
NG >> Repair or replace damaged parts.
Item Connector Terminal Continuity
TCM E32 37
Ye s
CVT unit harness connector F46 23
SCIA4690E

DTC P0841 PRESSURE SENSOR FUNCTION
CVT-113
< SERVICE INFORMATION >
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DTC P0841 PRESSURE SENSOR FUNCTION
DescriptionINFOID:0000000001703580
Using the engine load (throttle position), the primary pulley revolution speed, and the secondary pulley revolu-
tion speed as input signal, TCM changes the operating pressure of the primary pulley and the secondary pul-
ley and changes the groove width of the pulley to control the gear ratio.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001703581
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001703582
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0841 PRESS SEN/FNCTN” with CONSULT-III is detected when correlation
between the values of the secondary pressure sensor and the primary pressure sensor is out of specifica-
tion.
Possible CauseINFOID:0000000001703583
• Transmission fluid pressure sensor A (Secondary pressure sensor)
• Transmission fluid pressure sensor B (Primary pressure sensor)
• Harness or connectors
(Sensor circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000001703584
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-III
1. Turn ignition switch ON and select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Start engine and maintain the following conditions for at least 12 consecutive seconds.
VEHICLE SPEED: 40 km/h (25 MPH) More than
RANGE: “D” position
3. If DTC is detected, go to CVT-113, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001703585
1.CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to CVT-47, "
CONSULT-III Function (TRANSMISSION)".
Is any malfunction of the
“U1000 CAN COMM CIRCUIT” indicated?
YES >> Check CAN communication line. Refer to CVT-56.
NO >> GO TO 2.
2.CHECK INPUT SIGNALS
With CONSULT-III
1. Start engine.
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start vehicle and read out the value of “SEC HYDR SEN” and “PRI HYDR SEN”.
Item name Condition Display value (Approx.)
PRI HYDR SEN
“N” position idle0.7 V
SEC HYDR SEN1.0 V

DTC P0845 TRANSMISSION FLUID PRESSURE SENSOR B CIRCUIT (PRI
PRESSURE SENSOR)
CVT-115
< SERVICE INFORMATION >
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DTC P0845 TRANSMISSION FLUID PRESSURE SENSOR B CIRCUIT (PRI
PRESSURE SENSOR)
DescriptionINFOID:0000000001703586
• The transmission fluid pressure sensor B (primary pressure sensor) is included in the control valve assem-
bly.
• The transmission fluid pressure sensor B (primary pressure sensor) detects primary pressure of CVT and
sends TCM the signal.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001703587
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001703588
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0845 TR PRS SENS/B CIRC” with CONSULT-III is detected under the following
conditions.
- When TCM detects an improper voltage drop when it receives the sensor signal.
- When TCM compares target value with monitor value and detects an irregularity.
Possible CauseINFOID:0000000001703589
• Transmission fluid pressure sensor B (Primary pressure sensor)
• Harness or connectors
(Sensor circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000001703590
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-III
1. Turn ignition switch ON and select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Make sure that output voltage of line 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 wait for at least 5 consecutive seconds.
4. If DTC is detected, go to CVT-117, "
Diagnosis Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-III”.
Item name Condition Display value (Approx.)
PRI HYDR SEN “N” position idle 0.7 V

DTC P0845 TRANSMISSION FLUID PRESSURE SENSOR B CIRCUIT (PRI
PRESSURE SENSOR)
CVT-117
< SERVICE INFORMATION >
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Diagnosis ProcedureINFOID:0000000001703592
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start vehicle and read out the value of “PRI HYDR SEN”.
Without CONSULT-III
1. Start engine.
2. Check voltage between TCM connector terminal and ground.
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 terminals.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK HARNESS BETWEEN TCM AND CVT UNIT HARNESS CONNECTOR (SENSOR POWER AND
SENSOR GROUND)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and CVT unit harness connector.
3. Check continuity between TCM connector terminals and CVT
unit harness connector terminals.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
Item name Condition Display value (Approx.)
PRI HYDR SEN “N” position idle 0.7 V
Name Connector Terminal ConditionVoltage
(Approx.)
Transmis-
sion fluid
pressure
sensor B
(Primary
pressure
sensor)E32 41 - Ground “N” position idle 0.7 V
SCIA4509E
Item Connector TerminalData (Ap-
prox.)
TCM connector E32 46 - 42 5.0 V
SCIA2367E
Item Connector Terminal Continuity
TCM E32 42
Ye s
CVT unit harness connector F46 19
TCM E32 46
Ye s
CVT unit harness connector F46 20
SCIA4681E

CVT-118
< SERVICE INFORMATION >
DTC P0845 TRANSMISSION FLUID PRESSURE SENSOR B CIRCUIT (PRI
PRESSURE SENSOR)
OK or NG
OK >> Replace TCM. Refer to CVT-8, "Service After Replacing TCM and Transaxle Assembly" .
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK HARNESS BETWEEN TCM AND TRANSMISSION FLUID PRESSURE SENSOR B (PRIMARY
PRESSURE SENSOR)
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 open circuit or short to ground or short to power
in harness or connectors.
5.CHECK DTC
Perform CVT-115, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
6.CHECK TCM
1. Check TCM input/output signals. Refer to CVT-45, "
TCM Terminal and Reference Value" .
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-178, "Removal and Installation" .
NG >> Repair or replace damaged parts.
Item Connector Terminal Continuity
TCM E32 41
Ye s
CVT unit harness connector F46 25
SCIA4691E

DTC P0868 SECONDARY PRESSURE DOWN
CVT-119
< SERVICE INFORMATION >
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DTC P0868 SECONDARY PRESSURE DOWN
DescriptionINFOID:0000000001703593
• The pressure control solenoid valve B (secondary pressure solenoid valve) is included in the control valve
assembly.
• The pressure control solenoid valve B (secondary pressure solenoid valve) regulates the secondary pres-
sure to suit the driving condition in response to a signal sent from the TCM.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001703594
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001703595
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0868 SEC/PRESS DOWN” with CONSULT-III is detected when secondary fluid
pressure is too low compared with the commanded value while driving.
Possible CauseINFOID:0000000001703596
• 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 ProcedureINFOID:0000000001703597
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-III
1. Turn ignition switch ON and select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
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-119, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001703598
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start vehicle and read out the value of “SEC PRESS”.
Item name Condition Display value (Approx.)
SEC PRESS “N” position idle 0.8 MPa
Item name Condition Display value (Approx.)
SEC PRESS “N” position idle 0.8 MPa

DTC P1701 TRANSMISSION CONTROL MODULE (POWER SUPPLY)
CVT-121
< SERVICE INFORMATION >
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DTC P1701 TRANSMISSION CONTROL MODULE (POWER SUPPLY)
DescriptionINFOID:0000000001703599
When the power supply to the TCM is cut OFF, for example because the battery is removed, and the self-diag-
nosis memory function stops, malfunction is detected.
NOTE:
Since “P1701 TCM-POWER SUPPLY” will be indicated when replacing TCM, perform diagnosis after
erasing “SELF-DIAG RESULTS”
On Board Diagnosis LogicINFOID:0000000001703600
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1701 TCM-POWER SUPPLY” with CONSULT-III is detected when TCM does not
receive the voltage signal from the battery power supply.
• This is not a malfunction message. (Whenever shutting OFF a power supply to the TCM, this message
appears on the screen.)
Possible CauseINFOID:0000000001703601
Harness or connectors
(Battery or ignition switch and TCM circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000001703602
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-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Wait for at least 2 consecutive seconds.
4. If DTC is detected, go to CVT-123, "
Diagnosis Procedure" .