Nissan Teana J32. Manual - part 394

EC-114

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

• 1st trip freeze frame data

• System readiness test (SRT) codes

• Test  values

ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION

Item

DIAGNOSTIC TEST MODE

WORK 

SUPPORT

SELF-DIAGNOSTIC 

RESULTS

DATA 

MONI-

TOR

ACTIVE 

TEST

DTC & SRT

CONFIRMATION

DTC*

1

FREEZE 

FRAME 

DATA*

2

SRT STA-

TUS

DTC 

WORK 

SUP-

PORT

ENGINE CONTROL COMP

O

N

E

N

T P

A

R

T

S

INPUT

Crankshaft position sensor (POS)

×

×

×

Camshaft position sensor (PHASE)

×

×

×

Mass air flow sensor

×

×

Engine coolant temperature sensor

×

×

×

×

Engine oil temperature sensor

×

Air fuel ratio (A/F) sensor 1

×

×

×

×

Heated oxygen sensor 2

×

×

×

×

Vehicle speed signal

×

×

×

Accelerator pedal position sensor

×

×

Throttle position sensor

×

×

×

Intake air temperature sensor

×

×

Knock sensor

×

Refrigerant pressure sensor

×

Closed throttle position switch (accel-
erator pedal position sensor signal)

×

Air conditioner switch

×

Park/neutral position (PNP) signal

×

×

Stop lamp switch

×

×

Power steering pressure sensor

×

×

Battery voltage

×

Load signal

×

Primary speed sensor

×

×

Battery current sensor

×

×

ASCD steering switch

×

×

ASCD brake switch

×

×

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-115

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

X: Applicable

*1: This item includes 1st trip DTCs.

*2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-III screen in freeze frame data
mode only if a 1st trip DTC or DTC is detected. For details, refer to 

EC-102, "Diagnosis Description"

.

*3: Always “CMPLT” is displayed.

WORK SUPPORT MODE

Work Item

*: This function is not necessary in the usual service procedure.

SELF-DIAG RESULTS MODE

Self Diagnostic Item

Regarding items of DTC and 1st trip DTC, refer to 

EC-389, "DTC Index"

.

ENGINE CONTROL COMPON

E

N

T P

A

R

T

S

OU

T

P

U

T

Fuel injector

×

×

Power transistor (Ignition timing)

×

×

Throttle control motor relay

×

×

Throttle control motor

×

EVAP canister purge volume control 
solenoid valve

×

×

×

×

Air conditioner relay

×

Fuel pump relay

×

×

×

Cooling fan relay

×

×

×

Air fuel ratio (A/F) sensor 1 heater

×

×

×

*

3

Heated oxygen sensor 2 heater

×

×

×

*

3

Intake valve timing control solenoid 
valve

×

×

×

VIAS control solenoid valve 1

×

×

×

VIAS control solenoid valve 2

×

×

×

Electronic controlled engine mount

×

×

Alternator

×

×

Calculated load value

×

×

Item

DIAGNOSTIC TEST MODE

WORK 

SUPPORT

SELF-DIAGNOSTIC 

RESULTS

DATA 

MONI-

TOR

ACTIVE 

TEST

DTC & SRT

CONFIRMATION

DTC*

1

FREEZE 

FRAME 

DATA*

2

SRT STA-

TUS

DTC 

WORK 

SUP-

PORT

WORK ITEM

CONDITION

USAGE

FUEL PRESSURE RELEASE

• FUEL PUMP WILL STOP BY TOUCHING “START” DUR-

ING IDLING.
CRANK A FEW TIMES AFTER ENGINE STALLS.

When releasing fuel pressure from 
fuel line

IDLE AIR VOL LEARN

• THE IDLE AIR VOLUME THAT KEEPS THE ENGINE 

WITHIN THE SPECIFIED RANGE IS MEMORIZED IN 
ECM.

When learning the idle air volume

SELF-LEARNING CONT

• THE COEFFICIENT OF SELF-LEARNING CONTROL 

MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.

When clearing mixture ratio self-
learning value

TARGET IDLE RPM ADJ*

• IDLE CONDITION

When setting target idle speed

TARGET IGN TIM ADJ*

• IDLE CONDITION

When adjusting target ignition tim-
ing

EC-116

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Freeze Frame Data and 1st Trip Freeze Frame Data

*: The items are the same as those of 1st trip freeze frame data.

DATA MONITOR MODE

Monitored Item

×

: Applicable

Freeze frame data item*

Description

DIAG TROUBLE CODE
[PXXXX]

• The engine control component part/control system has a trouble code that is displayed as PXXXX. (Refer 

to 

EC-389, "DTC Index"

.)

FUEL SYS-B1

• “Fuel injection system status” at the moment a malfunction is detected is displayed.
• One of in the following mode is displayed.

Mode2: Open loop due to detected system malfunction
Mode3: Open loop due to driving conditions (power enrichment, deceleration enleanment)
Mode4: Closed loop - using oxygen sensor(s) as feedback for fuel control
Mode5: Open loop - has not yet satisfied condition to go to closed loop

FUEL SYS-B2

CAL/LD VALUE [%]

• The calculated load value at the moment a malfunction is detected is displayed.

COOLANT TEMP [

°

C] or 

[

°

F]

• The engine coolant temperature at the moment a malfunction is detected is displayed.

L-FUEL TRM-B1 [%]

• “Long-term fuel trim” at the moment a malfunction is detected is displayed.
• The long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule 

than short-term fuel trim.

L-FUEL TRM-B2 [%]

S-FUEL TRM-B1 [%]

• “Short-term fuel trim” at the moment a malfunction is detected is displayed.
• The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel 

schedule.

S-FUEL TRM-B2 [%]

ENGINE SPEED [rpm]

• The engine speed at the moment a malfunction is detected is displayed.

VEHICL SPEED
[km/h] or [mph]

• The vehicle speed at the moment a malfunction is detected is displayed.

ABSOL TH·P/S [%]

• The throttle valve opening angle at the moment a malfunction is detected is displayed.

B/FUEL SCHDL [msec]

• The base fuel schedule at the moment a malfunction is detected is displayed.

INT/A TEMP SE [

°

C] or 

[

°

F]

• The intake air temperature at the moment a malfunction is detected is displayed.

INT MANI PRES [kPa] 

• These items are displayed but are not applicable to this model.

COMBUST CONDITION

Monitored item

Unit

Description

Remarks

ENG SPEED

rpm

• Indicates the engine speed computed from the 

signal of the crankshaft position sensor (POS) 
and camshaft position sensor (PHASE).

• Accuracy becomes poor if engine 

speed drops below the idle rpm.

• If the signal is interrupted while the 

engine is running, an abnormal value 
may be indicated.

MAS A/F SE-B1

V

• The signal voltage of the mass air flow sensor is 

displayed.

• When the engine is stopped, a certain 

value is indicated.

• When engine is running, specification 

range is indicated in “SPEC”.

B/FUEL SCHDL

msec

• “Base fuel schedule” indicates the fuel injection 

pulse width programmed into ECM, prior to any 
learned on board correction.

• When engine is running, specification 

range is indicated in “SPEC”.

A/F ALPHA-B1

%

• The mean value of the air-fuel ratio feedback cor-

rection factor per cycle is indicated.

• When the engine is stopped, a certain 

value is indicated.

• This data also includes the data for 

the air-fuel ratio learning control.

• When engine is running, specification 

range is indicated in “SPEC”.

A/F ALPHA-B2

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-117

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

COOLAN TEMP/S

°

C or 

°

F

• The engine coolant temperature (determined by 

the signal voltage of the engine coolant tempera-
ture sensor) is displayed.

• When the engine coolant temperature 

sensor is open or short-circuited, 
ECM enters fail-safe mode. The en-
gine coolant temperature determined 
by the ECM is displayed.

A/F SEN1 (B1)

V

• The A/F signal computed from the input signal of 

the air fuel ratio (A/F) sensor 1 is displayed.

A/F SEN1 (B2)

HO2S2 (B1)

V

• The signal voltage of the heated oxygen sensor 2 

is displayed.

HO2S2 (B2)

HO2S2 MNTR(B1)

RICH/LEAN

• Display of heated oxygen sensor 2 signal:

RICH: means the amount of oxygen after three 
way catalyst is relatively small.
LEAN: means the amount of oxygen after three 
way catalyst is relatively large.

• When the engine is stopped, a certain 

value is indicated.

HO2S2 MNTR(B2)

VHCL SPEED SE

km/h or mph

• The vehicle speed computed from the vehicle 

speed signal sent from combination meter is dis-
played.

BATTERY VOLT

V

• The power supply voltage of ECM is displayed.

ACCEL SEN 1

V

• The accelerator pedal position sensor signal volt-

age is displayed.

• ACCEL SEN 2 signal is converted by 

ECM internally. Thus, it differs from 
ECM terminal voltage signal.

ACCEL SEN 2

TP SEN 1-B1

V

• The throttle position sensor signal voltage is dis-

played.

• TP SEN 2-B1 signal is converted by 

ECM internally. Thus, it differs from 
ECM terminal voltage signal.

TP SEN 2-B1

INT/A TEMP SE

°

C or 

°

F

• The intake air temperature (determined by the 

signal voltage of the intake air temperature sen-
sor) is indicated.

START SIGNAL

ON/OFF

• Indicates start signal status [ON/OFF] computed 

by the ECM according to the signals of engine 
speed and battery voltage.

• After starting the engine, [OFF] is dis-

played regardless of the starter sig-
nal.

CLSD THL POS

ON/OFF

• Indicates idle position [ON/OFF] computed by 

ECM according to the accelerator pedal position 
sensor signal.

AIR COND SIG

ON/OFF

• Indicates [ON/OFF] condition of the air condition-

er switch as determined by the air conditioner sig-
nal.

P/N POSI SW

ON/OFF

• Indicates [ON/OFF] condition from the park/neu-

tral position (PNP) signal.

PW/ST SIGNAL

ON/OFF

• [ON/OFF] condition of the power steering system 

(determined by the signal voltage of the power 
steering pressure sensor) is indicated.

LOAD SIGNAL

ON/OFF

• Indicates [ON/OFF] condition from the electrical 

load signal.
ON: Rear window defogger switch is ON and/or 
lighting switch is in 2nd position.
OFF: Both rear window defogger switch and light-
ing switch are OFF.

IGNITION SW

ON/OFF

• Indicates [ON/OFF] condition from ignition switch 

signal.

HEATER FAN SW

ON/OFF

• Indicates [ON/OFF] condition from the heater fan 

switch signal.

BRAKE SW

ON/OFF

• Indicates [ON/OFF] condition from the stop lamp 

switch signal.

INJ PULSE-B1

msec

• Indicates the actual fuel injection pulse width 

compensated by ECM according to the input sig-
nals.

• When the engine is stopped, a certain 

computed value is indicated.

INJ PULSE-B2

Monitored item

Unit

Description

Remarks