engine control NISSAN TEANA 2003 Service Manual

CVT-144
DTC P1723 CVT SPEED SENSOR FUNCTION

Diagnostic ProcedureBCS001L9
1. CHECK STEP MOTOR FUNCTION
Perform the self-diagnosis check. Refer to CVT-47, "
SELF-DIAGNOSTIC RESULT MODE" .
Is a malfunction in the step motor function indicated in the results?
YES >> Repair or replace damaged parts. (Check the step motor function. Refer to CVT-157, "DTC P1778
STEP MOTOR - FUNCTION" .)
NO >> GO TO 2.
2. CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR SYSTEM) AND INPUT SPEED
SENSOR (PRIMARY SPEED SENSOR) SYSTEM
Check secondary speed sensor system and 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 3.
NG >> Repair or replace damaged parts.
3. CHECK ENGINE SPEED SIGNAL SYSTEM
Check engine speed signal system. Refer to CVT-85, "
DTC P0725 ENGINE SPEED SIGNAL" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts. Refer to EC-735, "
IGNITION SIGNAL" .
4. DETECT MALFUNCTIONING ITEM
Check the following:

Power supply and ground circuit for TCM. Refer to CVT-134, "DTC P1701 TRANSMISSION CONTROL
MODULE (POWER SUPPLY)" .

The TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to CVT-143, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> Replace TCM or transaxle assembly. Refer to CVT-9, "
Precautions for TCM and CVT Assembly
Replacement" , CVT-193, "Removal and Installation" .

DTC P1726 ELECTRIC THROTTLE CONTROL SYSTEM
CVT-145
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DTC P1726 ELECTRIC THROTTLE CONTROL SYSTEMPFP:23710
DescriptionBCS001LA
Electric throttle control actuator consists of throttle control motor, accelerator pedal position sensor, throttle
position sensor etc. The actuator sends a signal to the ECM, and ECM sends the signal to TCM with CAN
communication.
On Board Diagnosis LogicBCS001LB
Diagnostic trouble code “P1726 ELEC TH CONTROL” with CONSULT-II is detected when the electronically
controlled throttle for ECM is malfunctioning.
Possible CauseBCS001LC
Harness or connectors
(Sensor circuit is open or shorted.)
DTC Confirmation ProcedureBCS001LD
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.
3. Start engine and let it idle for 5 second.
4. If DTC is detected, go to CVT-146, "
Diagnostic Procedure" .
BCIA0031E

CVT-146
DTC P1726 ELECTRIC THROTTLE CONTROL SYSTEM

Diagnostic ProcedureBCS001LE
1. CHECK DTC WITH ECM
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “ENGINE” with CON-
SULT-II. Refer to EC-427, "
SELF-DIAG RESULTS MODE" .
OK or NG
OK >> GO TO 2.
NG >>

Check the DTC Detected Item. Go to EC-427, "SELF-
DIAG RESULTS MODE" .

If CAN communication line is detected, go to CVT-53,
"DTC U1000 CAN COMMUNICATION LINE" .
2. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to CVT-145, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 3.
3. DETECT MALFUNCTIONING ITEM
Check the following:

The TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace TCM. Refer to CVT-9, "Precautions for TCM and CVT Assembly Replacement" .
NG >> Repair or replace damaged parts.
BCIA0030E

DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUIT
CVT-147
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DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUITPFP:31941
DescriptionBCS001LF

Lock-up select solenoid valve controls lock-up clutch pressure or forward clutch pressure (reverse brake
pressure).

When controlling lock-up clutch, the valve is turned OFF. When controlling forward clutch, it is turned ON.
CONSULT-II Reference ValueBCS001LG
On Board Diagnosis LogicBCS001LH
Diagnostic trouble code “P1740 LU-SLCT SOL/CIRC” with CONSULT-II is detected under the following condi-
tions.

When TCM compares target value with monitor value and detects an irregularity.
Possible CauseBCS001LI

Lock-up select solenoid valve

Harness or connectors
(Solenoid circuit is open or shorted.)
DTC Confirmation ProcedureBCS001LJ
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. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with
CONSULT-II.
3. Start engine and maintain the following conditions for at least 5
consecutive seconds.
RANGE: “D” position and “N” position
(At each time, wait for 5 seconds.)
4. If DTC is detected, go to CVT-149, "
Diagnostic Procedure" .
Item name Condition Display value
LUSEL SOL OUTSelector lever in “P”, “N” positions ON
Wait at least for 5 seconds with the selector
lever in “R”, “D” positionsOFF
BCIA0031E

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
BCIA0031E

DTC P1778 STEP MOTOR - FUNCTION
CVT-157
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DTC P1778 STEP MOTOR - FUNCTIONPFP:31947
DescriptionBCS001M0

The step motor's 4 aspects of ON/OFF change according to the signal from TCM. As a result, the flow of
line pressure to primary pulley is changed and pulley ratio is controlled.

This diagnosis item is detected when electrical system is OK, but mechanical system is NG.

This diagnosis item is detected when the state of the changing the speed mechanism in unit does not
operate normally.
CONSULT-II Reference ValueBCS001M1
Remarks: Specification data are reference values.
On Board Diagnosis LogicBCS001M2
Diagnostic trouble code “P1778 STEP MOTR/FNC” with CONSULT-II is detected under the following condi-
tions.

When not changing the pulley ratio according to the instruction of TCM.
Possible CauseBCS001M3
Ste p mo to r
DTC Confirmation ProcedureBCS001M4
CAUTION:

Always drive vehicle at a safe speed.

Before starting “DTC Confirmation Procedure”, confirm “Hi” or “Mid” or “Low” fixation by “PRI
SPEED” and “VEHICLE SPEED” on “DATA MONITOR MODE”.

If hi-geared fixation occurred, go to CVT-158, "Diagnostic Procedure" .
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. Select “DATA MONITOR” mode for “TRANSMISSION” with
CONSULT-II.
4. Start engine and maintain the following conditions for at least 30
consecutive seconds.
TEST START FROM 0 km/h (0 MPH)
CONSTANT ACCELERATION: Keep 30 sec or more
VEHICLE SPEED: 10 km/h (6 MPH) or more
ACC PEDAL OPEN: More than 1.0/8
RANGE: “D” position
ENG SPEED: 450 rpm or more
5. If DTC is detected, go to CVT-158, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
STM STEP
During driving−20 step - 190 step
GEAR RATIO2.37 - 0.43
BCIA0031E

CVT INDICATOR CIRCUIT
CVT-159
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CVT INDICATOR CIRCUITPFP:24810
DescriptionBCS001M6
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 CVT indicator.
CONSULT-II Reference ValueBCS001M7
Diagnostic ProcedureBCS001M8
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Start engine.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-II and read
out the value of “M GEAR POS”.
3. Drive vehicle in the manual mode, and confirm that the actual gear position and the meter's indication of
the position mutually coincide when the select lever is shifted to the “+ (up)” or “- (down)” side (1st ⇔ 6th
gear).
OK or NG
OK >>INSPECTION END
NG >> Check the following.
CVT INDICATOR SYMPTOM CHART
Item name Condition Display value
M GEAR POS During driving 1, 2, 3, 4, 5, 6
Items Presumed location of trouble
The actual gear position does not change, or shifting into the
manual mode is not possible (no gear shifting in the manual mode
possible).
The shift position indicator is not indicated.

Manual mode switch
Refer to CVT-113, "
DTC P0826 MANUAL MODE SWITCH
CIRCUIT" .

CVT main system (Fail-safe function actuated)
Refer to CVT-47, "
SELF-DIAGNOSTIC RESULT MODE" .
The actual gear position changes, but the shift position indicator
is not indicated.Perform the self-diagnosis function.
Refer to CVT-47, "
SELF-DIAGNOSTIC RESULT MODE" .
The actual gear position and the indication on the shift position
indicator do not coincide.Perform the self-diagnosis function.
Refer to CVT-47, "
SELF-DIAGNOSTIC RESULT MODE" .
Only a specific position or positions is/are not indicated on the
shift position indicator.Check the meter control unit.
Refer to DI-4, "
COMBINATION METERS" .

SHIFT CONTROL SYSTEM
CVT-179
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Checking of CVT PositionBCS001MO
1. Place selector lever in “P” position, and turn ignition switch ON. (Do not start engine.)
2. Make sure selector lever can be shifted to other than “P” position when brake pedal is depressed. Also
make sure selector lever can be shifted from “P” position only when brake pedal is depressed.
3. Move the selector lever and check for excessive effort, sticking, noise or rattle.
4. Confirm the selector lever stops at each position with the feel of engagement when it is moved through all
the positions. Check whether or not the actual position the selector lever is in matches the position shown
by the shift position indicator and the transaxle body.
5. The method of operating the lever to individual positions cor-
rectly should be as shown in the figure.
6. Confirm the back-up lamps illuminate only when lever is placed
in the “R” position. Confirm the back-up lamps do not illuminate
when the selector lever is pushed toward the “R” position side
with the gear position remained in the “P” or “N” position.
7. Confirm the engine can only be started with the selector lever in
the “P” and “N” positions.
8. Make sure transaxle is locked completely in “P” position.
9. When selector lever is set to manual shift gate, make sure man-
ual mode is displayed on combination meter.
Shift selector lever to “+” and “-” sides, and make sure set shift position changes.
SCIA4595E

CVT-198
SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
General SpecificationsBCS001N1
*1: Refer to MA-14, "Fluids and Lubricants" .
Vehicle Speed at Which Gear Shifting OccursBCS001N2
Numerical value data are reference values.
CAUTION:
Lock-up clutch is engaged when vehicle speed is approximately 18 km/h (11 MPH) to 90 km/h (56 MPH).
Stall SpeedBCS001N3
Line PressureBCS001N4
*1 : Reference values
Solenoid ValvesBCS001N5
Applied modelVQ35DE engine
2WD
CVT modelRE0F09A
CVT assembly Model code number 1XD14
Transmission gear ratioD range Variable
Reverse 1.766
Final drive 5.173
Recommended fluid NISSAN CVT Fluid NS-2*1
Fluid capacity 10.2 liter (9 Imp qt)
CAUTION:

Use only Genuine NISSAN CVT Fluid NS-2. Do not mix with other fluid.

Using CVT fluid other than Genuine NISSAN CVT Fluid NS-2 will deteriorate in driveability and CVT durability, and may
damage the CVT, which is not covered by the warranty.
Engine type Throttle position Shift patternEngine speed (rpm)
At 40 km/h (25 MPH) At 60 km/h (37 MPH)
VQ35DE8/8 “D” position 3,100 - 4,200 4,200 - 5,300
2/8 “D” position 1,200 - 2,000 1,300 - 2,100
Stall speed 2,700 - 3,250 rpm
Engine Engine speedLine pressure kPa (bar, kg/cm2 , psi)
“R”, “D” positions
VQ35DEAt idle speed 750 (7.50, 7.65, 108.8)
At stall speed
5,700 (57.00, 58.14, 826.5)*
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Name Resistance (Approx.) Terminal
Pressure control solenoid valve B (Secondary
pressure solenoid valve)
3 - 9 Ω3
Pressure control solenoid valve A (Line pressure
solenoid valve)2
Torque converter clutch solenoid valve12
Lock-up select solenoid valve 6 - 19 Ω13

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
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SECTION DI
A
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DI

DRIVER INFORMATION SYSTEM
PRECAUTION ............................................................ 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
COMBINATION METERS ........................................... 4
System Description .................................................. 4
UNIFIED METER CONTROL UNIT ...................... 4
UNIFIED METER AND A/C AMP. ......................... 4
FAIL-SAFE ............................................................ 5
HOW TO CHANGE THE DISPLAY FOR ODO/
TRIP METER ........................................................ 6
POWER SUPPLY AND GROUND CIRCUIT ........ 6
SPEEDOMETER ................................................... 7
TACHOMETER ..................................................... 7
LOW WATER TEMPERATURE INDICATOR
LAMP, HIGH WATER TEMPERATURE WARN-
ING LAMP ............................................................. 7
FUEL GAUGE ....................................................... 7
Component Parts and Harness Connector Location ..... 7
Arrangement of Combination Meter ......................... 8
Internal Circuit .......................................................... 9
Wiring Diagram — METER — ................................ 10
Terminals and Reference Value for Combination
Meter ...................................................................... 12
Terminals and Reference Value for Unified Meter
and A/C Amp. ......................................................... 13
Self-Diagnosis Mode of Combination Meter ........... 13
SELF-DIAGNOSIS MODE FUNCTION ............... 13
OPERATION PROCEDURE ............................... 13
CONSULT-II Function ............................................ 14
Trouble Diagnosis .................................................. 14
HOW TO PROCEED WITH TROUBLE DIAGNO-
SIS ...................................................................... 14
PRELIMINARY CHECK ...................................... 15
SYMPTOM CHART 1 .......................................... 17
SYMPTOM CHART 2 .......................................... 17
Power Supply and Ground Circuit Inspection ........ 18
Vehicle Speed Signal Inspection ............................ 20
Engine Speed Signal Inspection ............................ 21
Engine Coolant Temperature Signal Inspection ..... 21Fuel Level Sensor Signal Inspection ...................... 22
Fuel Gauge Does Not Move to FULL position ........ 23
Electrical Components Inspection .......................... 24
CHECK FUEL LEVEL SENSOR UNIT ................ 24
Removal and Installation of Combination Meter ..... 25
REMOVAL ........................................................... 25
INSTALLATION ................................................... 25
Disassembly and Assembly of Combination Meter ... 25
DISASSEMBLY ................................................... 26
ASSEMBLY ......................................................... 26
UNIFIED METER AND A/C AMP .............................. 27
System Description ................................................. 27
INPUT/OUTPUT SIGNALS ................................. 27
Schematic ............................................................... 28
CONSULT-II Function (METER A/C AMP) ............. 29
CONSULT-II BASIC OPERATION ....................... 29
SELF-DIAGNOSTIC RESULTS ........................... 29
DATA MONITOR ................................................. 30
DTC [U1000] CAN Communication Circuit ............. 32
DTC [B2202] Meter Communication Circuit ........... 32
DTC [B2205] Vehicle Speed Circuit ........................ 34
Removal and Installation of Unified Meter and A/C
Amp. ....................................................................... 34
REMOVAL ........................................................... 34
INSTALLATION ................................................... 34
WARNING LAMPS .................................................... 35
System Description ................................................. 35
OIL PRESSURE WARNING LAMP ..................... 35
Schematic ............................................................... 36
Wiring Diagram — WARN — .................................. 37
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) ............................................................. 45
Oil Pressure Warning Lamp Does Not Turn Off (Oil
Pressure Is Normal) ................................................ 46
Electrical Component Inspection ............................ 47
OIL PRESSURE SWITCH ................................... 47
A/T INDICATOR ........................................................ 48
Wiring Diagram — AT/IND — ................................. 48
A/T Indicator Is Malfunction .................................... 50
CVT INDICATOR ....................................................... 52