2003 NISSAN TEANA fuel pressure

A/T CONTROL SYSTEM
AT-29
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AT LOW FLUID TEMPERATURE

A/T fluid viscosity and frictional characteristics of the clutch facing change with A/T fluid temperature.
Clutch engaging or band-contacting pressure is compensated for, according to A/T fluid temperature, to
stabilize shifting quality.

The line pressure is reduced below 60°C (140°F) to prevent
shifting shock due to low viscosity of A/T fluid when temperature
is low.

Line pressure is increased to a maximum irrespective of the
throttle opening when A/T fluid temperature drops to −10°C
(14°F). This pressure rise is adopted to prevent a delay in clutch
and brake operation due to extreme drop of A/T fluid viscosity at
low temperature.
Shift ControlBCS000ZT
The shift is regulated entirely by electronic control to accommodate vehicle speed and varying engine opera-
tions. This is accomplished by electrical signals transmitted by the revolution sensor and the ECM (accelerator
pedal position sensor). This results in improved acceleration performance and fuel economy.
CONTROL OF SHIFT SOLENOID VALVES A AND B
The TCM activates shift solenoid valves A and B according to sig-
nals from the accelerator pedal position sensor and revolution sen-
sor to select the optimum gear position on the basis of the shift
schedule memorized in the TCM.
The shift solenoid valve performs simple ON-OFF operation. When
set to “ON”, the drain circuit closes and pilot pressure is applied to
the shift valve.
RELATION BETWEEN SHIFT SOLENOID VALVES A AND B AND GEAR POSITIONS
SCIA4829E
SCIA4830E
SAT008J
Gear position 1 2 3 4
Shift solenoid valve A ON (Closed) OFF (Open) OFF (Open) ON (Closed)
Shift solenoid valve B ON (Closed) ON (Closed) OFF (Open) OFF (Open)

SYSTEM DESCRIPTION
BRC-41
[VDC/TCS/ABS]
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SYSTEM DESCRIPTIONPFP:00000
System DiagramBFS000DP
FunctionsBFS000DQ
VDC

In addition to the TCS/ABS function, the steering amount and brake operation amount are detected from
the steering angle sensor and brake switch, and the driving condition (amount of under-steering/over-
steering) is determined from information from the yaw rate/side/decel G sensor, vehicle speed sensor, etc.
This information is used to improve vehicle stability by controlling the braking and engine power to all four
wheels.

The SLIP indicator lamp flashes to inform the driver of VDC operation.

During VDC operation, the body and brake pedal lightly vibrate and mechanical noises may be heard.
This is normal.

ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp might turn on when the vehicle is
subject to strong shaking or large vibration, such as when the vehicle is on a turn table or a ship while
engine is running. In this case, restart engine on a normal road, and if ABS warning lamp, VDC OFF indi-
cator lamp, and SLIP indicator lamp turn off, there is no malfunction.
TCS

Speed signals for 4 wheels control engine output and transaxle conditions so that slip rate of the drive
wheels is optimum. ABS actuator and electric unit (control unit) detects wheelspin. Output from the control
unit controls brake fluid pressure to both LH and RH drive wheels while cutting fuel to the engine and clos-
ing the throttle valve to reduce engine torque when wheelspin is detected. Throttle position is continuously
controlled to ensure the appropriate engine torque at all times.

Depending on road conditions, the driver may have a sluggish feel. This is normal, because the optimum
traction has the highest priority by TCS operation.

TCS may be activated momentarily the vehicle suddenly accelerates, suddenly downshifts, or is driven on
a road with a varying surface friction coefficient.

During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.
SFIA3329E

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
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SECTION DI
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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

COMBINATION METERS
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FA I L - S A F E
Solution When Communication Error Between the Unified Meter and A/C Amp. and the Com-
bination Meter
Function Specifications
SpeedometerReturn to zero when discontinuing communication or receiv-
ing irregular data.
Tachometer
Reset to zero by suspending communication.
Fuel gauge
Illumination control Combination meter illumination When suspending communication, change to nighttime mode.
Odo/trip meter Integrate in response to 8-pulse input.
Shift indicator The display turns off by suspending communication.
Warning buzzer The warning buzzer turns off by suspending communication.
Warning lamp/indicator lampLow water temperature indicator lamp
The lamp turns on by suspending communication. VDC OFF indicator (With VDC)
SLIP indicator (With VDC)
Brake warning lamp
ABS warning lamp
ASCD CRUISE indicator lamp
The lamp turns off by suspending communication. ASCD SET indicator lamp
Turn signal indicator lamp
High-beam indicator lamp
Front fog indicator lamp
Rear fog indicator lamp
Oil pressure warning lamp
Door warning lamp
High water temperature warning lamp
Malfunction indicator lamp
A/T CHECK warning lamp
CVT indicator lamp
KEY warning lamp
LOCK warning lamp

COMBINATION METERS
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PRELIMINARY CHECK
1. CHECK SELF-DIAGNOSIS RESULT OF UNIFIED METER AND A/C AMP.
1. Start engine.
2. Select “METER A/C AMP” on COSULT-II, and perform self-diagnosis of unified meter and A/C amp. Refer
to DI-29, "
CONSULT-II Function (METER A/C AMP)"
3. After erasing the self-diagnosis result, perform self-diagnosis again.
Self-diagnosis results content
No malfunction detected >> GO TO 2.
Malfuction detected >> GO TO DI-17, "
SYMPTOM CHART 2" .
2. CHECK WARNING LAMP ILLUMINATION
1. Turn ignition switch ON.
2. Make sure warninig lamps (such as malfunction indicator lamp and oil pressure warning lamp) illuminate.
Do warninig lamps illuminate?
OK >> GO TO 3.
NG >> Check ignition power supply system of combination meter.
3. CHECK SELF-DIAGNOSIS OPERATION OF COMBINATION METER
Perform combination meter self-diagnosis. Refer to DI-13, "
OPERATION PROCEDURE" .
Does self-diagnosis function operate?
OK >> GO TO 4.
NG >> Check battery power supply of combinatiom meter and ground circuit.
4. CHECK COMBINATION METER CIRCUIT
Check indication of each meter/gauge in self-diagnosis mode.
OK or NG
OK >> GO TO 5
NG >> Replace combination meter.
5. CHECK LOW-FUEL WARNING LAMP ILLUMINATION
While checking low-fuel warning lamp check, confirm illumination of low-fuel warning lamp.
Does low
-fuel warning lamp illuminate (while not pushing odo/trip meter switch)?
YES >> GO TO 6.
NO >> Replace combination meter.
Condition of odo/trip meter switch Low-fuel warning lamp
Pressed Does not illuminate.
Released Illuminates.

UNIFIED METER AND A/C AMP
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UNIFIED METER AND A/C AMPPFP:27760
System DescriptionBKS001SK

For the unified meter and A/C amp., the signal required for con-
trolling the combination meter are integrated in the A/C auto
amp.

Unified meter and A/C amp. controls each operation for A/C
auto amp. For information regarding A/C control, refer to AT C -
24, "AIR CONDITIONER CONTROL" .

Unified meter and A/C amp. inputs necessary information for
combination meter from each unit by CAN communication and
so on.

And unified meter and A/C amp. outputs these signals using
communication line (TX, RX) between unified meter and A/C
amp. and combination meter.

The signals required for the distance to empty (DTE) display are centralized in the unified meter and A/C
amp., converted into data, and sent to the display unit (with display unit) using CAN communication.

Other input signals are also sent to the ECM, TCM, BCM and display unit (with display unit) using CAN
communication.

The unified meter and A/C amp. correspond a CONSULT-II function (self-diagnostic results, CAN diag-
nostic support monitor and data monitor).
INPUT/OUTPUT SIGNALS
Between Unified Meter and A/C amp. and Combination Meter
SKIB0778E
Unit Input Output
Unified meter and A/C amp.

Seat belt buckle switch signal (Driver's side)

Parking brake signal

Illumination control nighttime required signal

Refuel status signal

Low-fuel warning lamp condition signal

Combination meter receive error signal

Delivery destination data signal

Combination meter specifications signal

Vehicle speed signal (8-pulse)

Engine speed signal

Engine coolant temperature signal

Fuel level sensor signal (resistance value)

Malfunction indicator lamp signal

ABS warning lamp signal

Brake warning lamp signal

KEY warning lamp signal (With Intelligent Key)

LOCK warning lamp signal (With Intelligent Key)

High-beam request signal

Turn indicator signal

VDC OFF indicator lamp signal (With VDC)

SLIP indicator lamp signal (With VDC)

ASCD CRUISE indicator lamp signal

ASCD SET indicator lamp signal

A/T position indicator signal

A/T CHECK warning lamp signal

CVT indicator lamp signal

CVT position indicator signal

Door switch signal

Oil pressure switch signal

Position lights request signal

Front fog light request signal

Rear fog light request signal

Buzzer output signal

DI-30
UNIFIED METER AND A/C AMP

DATA MONITOR
Operation Procedure
1. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
2. Touch either “MAIN SIGNALS” or “SELECTION FROM MENU” on the “DATA MONITOR” screen.
3. When “SELECTION FROM MENU” is selected, touch individual
items to be monitored. When “MAIN SIGNALS” is selected,
main items will be monitored.
4. Touch “START”.
5. Touch “RECORD” while monitoring, then the status of the moni-
tored item can be recorded. To stop recording, touch “STOP”.
Display Item List
MAIN SIGNALS Monitors main signals.
SELECTION FROM MENU Selects and monitors individual signal.
SKIA8739E
Monitor item [Unit] MAIN SIGNALSSELECTION
FROM MENUContents
SPEED METER [km/h] or [mph] X XThis is the angle correction value after the speed signal from
the ABS actuator and electric unit (control unit) is converted
into the vehicle speed.
SPEED OUTPUT [km/h] or [mph] X XThis is the angle correction value before the speed signal
from the ABS actuator and electric unit (control unit) is con-
verted into the vehicle speed.
TACHO METER [rpm] X XThis is the converted value for the engine speed signal from
the ECM.
W TEMP METER [°C] or [°F] X XThis is the converted value for the engine coolant tempera-
ture signal from the ECM.
FUEL METER [lit.] X XThis is the processed value for the signal (resistance value)
from the fuel gauge.
DISTANCE [km] or [mile] X XThis is the calculated value for the speed signal from the
ABS actuator and electric unit (control unit), the signal
(resistance signal) from the fuel gauge and fuel consumption
signal from ECM.
FUEL W/L [ON/OFF] X X Indicates [ON/OFF] condition of low-fuel warning lamp.
MIL [ON/OFF] X Indicates [ON/OFF] condition of malfunction indicator lamp.
BUZZER [ON/OFF] X X Indicates [ON/OFF] condition of buzzer.
DOOR W/L [ON/OFF] X Indicates [ON/OFF] condition of door warning lamp.
HI-BEAM IND [ON/OFF] X Indicates [ON/OFF] condition of high-beam indicator.
TURN IND [ON/OFF] X Indicates [ON/OFF] condition of turn indicator.
FR FOG IND X Indicates [ON/OFF] condition of front fog lamp indicator.
RR FOG IND X Indicates [ON/OFF] condition of rear fog lamp.
OIL W/L [ON/OFF] X Indicates [ON/OFF] condition of oil pressure warning lamp.
LIGHT IND [ON/OFF] X Indicates [ON/OFF] condition of light indicator lamp.
VDC/TCS IND [ON/OFF] X Indicates [ON/OFF] condition of VDC OFF indicator lamp.
ABS W/L [ON/OFF] X Indicates [ON/OFF] condition of ABS warning lamp.
SLIP IND [ON/OFF] X Indicates [ON/OFF] condition of SLIP indicator lamp.
BRAKE W/L [ON/OFF] X Indicates [ON/OFF] condition of brake warning lamp.*
KEY G W/L [ON/OFF] X Indicates [ON/OFF] condition of key warning lamp (green).

EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
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SECTION EC
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ENGINE CONTROL SYSTEM
QR
INDEX FOR DTC ...................................................... 10
DTC No. Index ....................................................... 10
Alphabetical Index .................................................. 12
PRECAUTIONS ........................................................ 14
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................ 14
On Board Diagnostic (OBD) System of Engine ...... 14
Precaution .............................................................. 14
PREPARATION ......................................................... 18
Special Service Tools ............................................. 18
Commercial Service Tools ...................................... 19
ENGINE CONTROL SYSTEM .................................. 20
System Diagram ..................................................... 20
Multiport Fuel Injection (MFI) System .................... 21
Electronic Ignition (EI) System ............................... 23
Fuel Cut Control (At No Load and High Engine
Speed) .................................................................... 24
AIR CONDITIONING CUT CONTROL ..................... 25
Input/Output Signal Chart ....................................... 25
CAN COMMUNICATION .......................................... 26
System Description ................................................ 26
EVAPORATIVE EMISSION SYSTEM ....................... 27
Description ............................................................. 27
Component Inspection ........................................... 29
POSITIVE CRANKCASE VENTILATION ................. 30
Description ............................................................. 30
Component Inspection ........................................... 30
NATS (NISSAN ANTI-THEFT SYSTEM) .................. 32
Description ............................................................. 32
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 33
Introduction ............................................................ 33
Two Trip Detection Logic ........................................ 33
Emission-related Diagnostic Information ................ 33
Malfunction Indicator (MI) ....................................... 36
BASIC SERVICE PROCEDURE .............................. 40
Basic Inspection ..................................................... 40
Idle Speed and Ignition Timing Check .................... 45
Procedure After Replacing ECM ............................ 47Accelerator Pedal Released Position Learning ...... 47
Throttle Valve Closed Position Learning ................. 47
Idle Air Volume Learning ........................................ 47
Fuel Pressure Check .............................................. 49
TROUBLE DIAGNOSIS ............................................ 52
Trouble Diagnosis Introduction ............................... 52
DTC Inspection Priority Chart ................................. 58
Fail-Safe Chart ....................................................... 59
Symptom Matrix Chart ............................................ 60
Engine Control Component Parts Location ............ 64
Vacuum Hose Drawing ........................................... 69
Circuit Diagram ....................................................... 70
ECM Harness Connector Terminal Layout ............. 72
ECM Terminals and Reference Value ..................... 72
CONSULT-II Function (ENGINE) ............................ 80
CONSULT-II Reference Value in Data Monitor Mode
... 90
Major Sensor Reference Graph in Data Monitor
Mode ....................................................................... 93
TROUBLE DIAGNOSIS - SPECIFICATION VALUE ... 95
Description .............................................................. 95
Testing Condition .................................................... 95
Inspection Procedure .............................................. 95
Diagnostic Procedure ............................................. 96
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................105
Description ............................................................105
Diagnostic Procedure ...........................................105
POWER SUPPLY AND GROUND CIRCUIT ...........106
Wiring Diagram .....................................................106
Diagnostic Procedure ...........................................107
Ground Inspection .................................................111
DTC U1000, U1001 CAN COMMUNICATION LINE .113
Description ............................................................113
On Board Diagnosis Logic ....................................113
DTC Confirmation Procedure ...............................113
Wiring Diagram .....................................................114
Diagnostic Procedure ...........................................115
DTC P0011 IVT CONTROL .....................................116
Description ............................................................116