Nissan Frontier D22. Manual — part 393

TROUBLE DIAGNOSIS

EC-675

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

*: Any mode except OFF, ambient air temperature is above 25

°C (77°F).

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

CONSULT-II Function

UBS00DFA

FUNCTION

*: The following emission-related diagnostic information is cleared when the ECM memory is erased.

●

Diagnostic trouble codes

●

1st trip diagnostic trouble codes

●

Freeze frame data

121

BR

Heated oxygen sensor
1 heater (bank 2)

[Engine is running]

●

Engine speed is below 2,800 rpm

Approximately 0.4V

[Engine is running]

●

Engine speed is above 2,800 rpm

BATTERY VOLTAGE
(11 - 14V)

122

R/B

Heated oxygen sensor
2 heater (bank 1)

[Engine is running]

●

Engine speed is below 3,600 rpm after the fol-
lowing conditions are met

–

Warm-up condition

–

Keeping the engine speed between 3,500 and
4,000 rpm for 1 minute and at idle for 1 minute
under no load

0 - 1.0V

[Ignition switch: ON]

●

Engine stopped

[Engine is running]

●

Engine speed is above 3,600 rpm

BATTERY VOLTAGE
(11 - 14V)

123

R/Y

Heated oxygen sensor
2 heater (bank 2)

[Engine is running]

●

Engine speed is below 3,600 rpm after the fol-
lowing conditions are met

–

Warm-up condition

–

Keeping the engine speed between 3,500 and
4,000 rpm for 1 minute and at idle for 1 minute
under no load

0 - 1.0V

[Ignition switch: ON]

●

Engine stopped

[Engine is running]

●

Engine speed is above 3,600 rpm

BATTERY VOLTAGE
(11 - 14V)

124

B/R

ECM ground

[Engine is running]

●

Idle speed

Engine ground

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Diagnostic test mode

Function

Work support

This mode enables a technician to adjust some devices faster and more accurately by following the
indications on the CONSULT-II unit.

Self-diagnostic results

Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data
can be read and erased quickly.*

Data monitor

Input/Output data in the ECM can be read.

Data monitor (SPEC)

Input/Output specification of the basic fuel schedule, AFM, A/F feedback control value and the other
data monitor items can be read.

Active test

Diagnostic Test Mode in which CONSULT-II drives some actuators apart from the ECMs and also
shifts some parameters in a specified range.

DTC & SRT confirmation

The status of system monitoring tests and the self-diagnosis status/result can be confirmed.

Function test

This mode is used to inform customers when their vehicle condition requires periodic maintenance.

ECM part number

ECM part number can be read.

EC-676

[VG33E]

TROUBLE DIAGNOSIS

●

1st trip freeze frame data

●

System readiness test (SRT) codes

●

Test values

●

Others

ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION

Item

DIAGNOSTIC TEST MODE

WORK

SUP-

PORT

SELF-DIAGNOS-

TIC RESULTS

DATA

MONI-

TOR

DATA

MONI-

TOR

(SPEC)

ACTIVE

TEST

DTC & SRT CON-

FIRMATION

DTC*1

FREEZE

FRAME
DATA*2

SRT

STA-

TUS

DTC

WORK

SUP-

PORT

ENGINE

CO

NT
R

O

L

COMPONENT P

ARTS

INPUT

Camshaft position sensor

×

×

×

×

Mass air flow sensor

×

×

×

Engine coolant temperature sensor

×

×

×

×

×

Heated oxygen sensor 1

×

×

×

×

×

Heated oxygen sensor 2

×

×

×

×

×

Vehicle speed sensor

×

×

×

×

Throttle position sensor

×

×

×

×

Fuel tank temperature sensor

×

×

×

×

EVAP control system pressure
sensor

×

×

×

EGR temperature sensor

×

×

×

Intake air temperature sensor

×

×

×

×

Crankshaft position sensor (OBD)

×

Knock sensor

×

Ignition switch (start signal)

×

×

Closed throttle position switch

×

×

×

Closed throttle position switch
(throttle position sensor signal)

×

×

Air conditioner switch

×

×

Park/neutral position (PNP) switch

×

×

×

Power steering oil pressure switch

×

×

Battery voltage

×

×

Ambient air temperature switch

×

×

ENGIN

E

CONTROL COM

P

ONENT P

ARTS

OUTPUT

Injectors

×

×

×

Power transistor (Ignition timing)

×

×

×

×

IACV-AAC valve

×

×

×

×

×

EVAP canister purge volume con-
trol solenoid valve

×

×

×

×

×

Air conditioner relay

×

×

Fuel pump relay

×

×

×

×

EGRC-solenoid valve

×

×

×

×

Heated oxygen sensor 1 heater

×

×

×

×

Heated oxygen sensor 2 heater

×

×

×

×

EVAP canister vent control valve

×

×

×

×

×

Vacuum cut valve bypass valve

×

×

×

×

×

×

Calculated load value

×

×

×

TROUBLE DIAGNOSIS

EC-677

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

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-II screen in freeze frame data
mode only if a 1st trip DTC or DTC is detected. For details, refer to

EC-678, "Freeze Frame Data and 1st Trip Freeze Frame Data"

.

INSPECTION PROCEDURE

1.

Turn ignition switch OFF.

2.

Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector which is located under LH dash panel near the
fuse box cover.

3.

Turn ignition switch ON.

4.

Touch “START (NISSAN BASED VHCL)”.

5.

Touch “ENGINE”.
If “ENGINE” is not indicated, go to

GI-36, "CONSULT-II Data

Link Connector (DLC) Circuit"

.

6.

Perform each diagnostic test mode according to each service
procedure.

For further information, see the CONSULT-II Operation Manual.

LEC104A

MBIB0233E

SEF948Y

SEF949Y

EC-678

[VG33E]

TROUBLE DIAGNOSIS

WORK SUPPORT MODE
Work Item

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

SELF-DIAGNOSTIC MODE
Self Diagnostic Item

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

EC-584, "INDEX FOR DTC"

.

Freeze Frame Data and 1st Trip Freeze Frame Data

WORK ITEM

CONDITION

USAGE

TP SW/TP SEN IDLE POSI ADJ

●

FOLLOW THE BASIC INSPECTION INSTRUCTION IN
THE SERVICE MANUAL.

When adjusting the idle throttle
position

IGNITION TIMING ADJ

●

IGNITION TIMING FEEDBACK CONTROL WILL BE
HELD BY TOUCHING “START”. AFTER DOING SO,
ADJUST IGNITION TIMING WITH A TIMING LIGHT BY
TURNING THE CAMSHAFT POSITION SENSOR.

When adjusting target ignition tim-
ing
After adjustment, confirm target
ignition timing with a timing light
by turning the distributor.

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

SELF-LEARNING CONT

●

THE COEFFICIENT OF SELF-LEARNING CONTROL
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.

When clean the coefficient of self-
learning control valve

EVAP SYSTEM CLOSE

OPEN THE VACUUM CUT VALVE BYPASS VALVE AND
CLOSE THE EVAP CANISTER VENT CONTROL VALVE IN
ORDER TO MAKE EVAP SYSTEM CLOSE UNDER THE
FOLLOWING CONDITIONS.

●

IGN SW ON

●

ENGINE NOT RUNNING

●

AMBIENT TEMPERATURE IS ABOVE 0

°C (32°F).

●

NO VACUUM AND NO HIGH PRESSURE IN EVAP SYS-
TEM

●

FUEL TANK TEMP. IS MORE THAN 0

°C (32°F).

●

WITHIN 10 MINUTES AFTER STARTING “EVAP SYS-
TEM CLOSE”

●

WHEN TRYING TO EXECUTE “EVAP SYSTEM CLOSE”
UNDER THE CONDITION EXCEPT ABOVE, CONSULT-
II WILL DISCONTINUE IT AND DISPLAY APPROPRIATE
INSTRUCTION.

NOTE:
WHEN STARTING ENGINE, CONSULT-II MAY DISPLAY
“BATTERY VOLTAGE IS LOW. CHARGE BATTERY”,
EVEN IN USING CHARGED BATTERY.

When detecting EVAP vapor leak
point of EVAP system

TARGET IDLE RPM ADJ*

SET ENGINE SPEED AT THE SPECIFIED VALUE UNDER
THE FOLLOWING CONDITIONS.

●

ENGINE WARMED UP

●

NO LOAD

When adjusting initial ignition tim-
ing and idle speed

Freeze frame data

item *

Description

DIAG TROUBLE
CODE
[PXXXX]

●

The engine control component part/control system has a trouble code, it is displayed as “PXXXX”. (Refer
to

EC-584, "INDEX FOR DTC"

.)

FUEL SYS-B1 *

●

“Fuel injection system status” at the moment a malfunction is detected is displayed.

●

One mode in the following is displayed.
Mode 2: Open loop due to detected system malfunction
Mode 3: Open loop due to driving conditions (power enrichment, deceleration enleanment)
Mode 4: Closed loop - using oxygen sensor(s) as feedback for fuel control
Mode 5: Open loop - has not yet satisfied condition to go to closed loop

FUEL SYS-B2 *