1998 NISSAN PICK-UP ECO mode

HOW TO SWITCH DIAGNOSTIC TEST MODES (LHD models)
Turn ignition switch ``ON''.
(Do not start engine.)
c
Diagnostic Test Mode I Ð BULB
CHECK. Refer to previous page.
MIL should come on.
OK
cNGCheck MIL circuit.
(See EC-173.)
OK
cNG
Repair harness or
connectors.
b
cG
Start engine.
cDiagnostic Test
Mode I
Ð MALFUNC-
TION WARN-
ING.
Refer to previ-
ous page.
Data link connector for CONSULT
(Connect CHK and IGN terminals with a
suitable harness.)
MIL should go off.
OK
cNG
Check MIL circuit and data link connector for
CONSULT circuit. (See EC-173.)
OK NG
Check ECM fail-
safe.
(See EC-61.)
Repair harness or
connectors.
OK
Wait at least 2 seconds.
b
Data link connector for CONSULT
(Disconnect the suitable harness
between CHK and IGN terminals.)
DIAGNOSTIC TEST MODE II
Ð SELF-DIAGNOSTIC RESULTScG
Start engine.
cDiagnostic Test
Mode II
Ð HEATED
OXYGEN
SENSOR
MONITOR
VBVA
.
.
..
.
.
.
.
.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONKA
Malfunction Indicator Lamp (MIL) (Cont'd)
EC-39

VBmVA
.
Data link connector for CONSULT
(Connect CHK and IGN terminals with a
suitable harness.)
Wait at least 2 seconds.
*1
Data link connector for CONSULT
(Disconnect the suitable harness
between CHK and IGN terminals.)
lSwitching the modes is not possible when the
engine is running.
lWhen ignition switch is turned OFF during
diagnosis, power to ECM will drop after
approx. 5 seconds.
The diagnosis will automatically return to
Diagnostic Test Mode I.
*1: If the suitable harness is disconnected at this time, the
diagnostic trouble code will be erased from the backup
memory in the ECM..
.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONKA
Malfunction Indicator Lamp (MIL) (Cont'd)
EC-40

HOW TO SWITCH DIAGNOSTIC TEST MODES (RHD models)
Turn ignition switch ``ON''. (Do not
start engine.)
cDiagnostic Test Mode I Ð BULB CHECK.
Refer to previous page.
MIL should come on.
OK
cNGCheck MIL cir-
cuit.
(See EC-174.)
OK
cNG
Repair harness
or connectors.
bYes
Check whether
ECM test mode
selector can be
turned counter-
clockwise.cNo
Repair or
replace ECM
test mode
selector.
cG
Start engine.
cDiagnostic Test
Mode I
Ð MALFUNC-
TION
WARNING.
Refer to pre-
vious page.
Data link connector for CONSULT
(Connect CHK and IGN terminals
with a suitable harness.)
MIL should go off. (Turn diagnostic test mode
selector on ECM fully clockwise.)
MIL should go off.or
OK
cNG
Check MIL circuit and data link connector
for CONSULT circuit. (See EC-174.)
OK NG
Check ECM
fail-safe.
(See EC-61.)
OKRepair harness
or connectors.OK
Wait at least 2 seconds.
b
Data link connector for CONSULT
(Disconnect the suitable harness
between CHK and IGN terminals.) (Turn diagnostic test mode
selector fully counterclockwise.)or
DIAGNOSTIC TEST MODE II
Ð SELF-DIAGNOSTIC RESULTS
VBVA
.
.
.
..
.
.
.
.
.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONKA
Malfunction Indicator Lamp (MIL) (Cont'd)
EC-41

VBmVA
Data link connector for CONSULT
(Connect CHK and IGN terminals
with a suitable harness.) (Turn diagnostic test mode
selector on ECM fully clockwise.)
MIL should go off.or
Wait at least 2 seconds.
*1
Data link connector for CONSULT
(Disconnect the suitable harness
between CHK and IGN terminals.) (Turn diagnostic test mode
selector fully counterclockwise.)or
lSwitching the modes is not possible
when the engine is running.
lWhen ignition switch is turned off
during diagnosis, power to ECM will
drop after approx. 5 seconds.
The diagnosis will automatically
return to Diagnostic Test Mode I.
lTurn back diagnostic test mode
selector to the fully counterclock-
wise position whenever vehicle is in
use.
*1: If the selector is turned fully counterclock-
wise or suitable harness is disconnected at
this time, the diagnostic trouble code will be
erased from the backup memory in the ECM.
.
.
.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONKA
Malfunction Indicator Lamp (MIL) (Cont'd)
EC-42

DIAGNOSTIC TEST MODE IÐBULB CHECK
In this mode, the MALFUNCTION INDICATOR LAMP on the instrument panel should stay ON. If it remains
OFF, check the bulb. (See the WARNING LAMPS AND CHIME in the EL section. Or see EC-173, 174.)
DIAGNOSTIC TEST MODE IÐMALFUNCTION WARNING
MALFUNCTION
INDICATOR LAMPCondition
ON When the malfunction is detected (Refer to EC-1.) or the ECM's CPU is malfunctioning.
OFF No malfunction
lThese Diagnostic Trouble Code Numbers are clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC
RESULTS).
DIAGNOSTIC TEST MODE IIÐSELF-DIAGNOSTIC RESULTS
In this mode, a diagnostic trouble code is indicated by the number of blinks of the MALFUNCTION INDICA-
TOR LAMP as shown below.
Long (0.6 second) blinking indicates the number of ten digits, and short (0.3 second) blinking indicates the
number of single digits. For example, the malfunction indicator lamp blinks 4 times for about 5 seconds (0.6
sec x 8 times) and then it blinks three times for about 1 second (0.3 sec x 3 times). This indicates the DTC
``43'' and refers to the malfunction of the throttle position sensor.
In this way, all the detected malfunctions are classified by their diagnostic trouble code numbers. The DTC
``55'' refers to no malfunction. (See DIAGNOSTIC TROUBLE CODE INDEX, refer to page EC-1.)
How to erase diagnostic test mode II (Self-diagnostic results)
The diagnostic trouble code can be erased from the backup memory in the ECM when the diagnostic test
mode is changed from Diagnostic Test Mode II to Diagnostic Test Mode I. (Refer to ``HOW TO SWITCH
DIAGNOSTIC TEST MODES''.)
lIf the battery terminal is disconnected, the diagnostic trouble code will be lost from the backup
memory within 24 hours.
lBe careful not to erase the stored memory before starting trouble diagnoses.
lIf the MIL blinks or ``NATS MALFUNCTION'' is displayed
on ``SELF-DIAG RESULTS'' screen, perform self-diag-
nostic results mode with CONSULT using NATS pro-
gram card (NATS-E940). Refer to EL section.
lConfirm no self-diagnostic results of NATS is displayed
before touching ``ERASE'' in ``SELF-DIAG RESULTS''
mode with CONSULT.
lWhen replacing ECM, initialisation of NATS V2.0 system
and registration of all NATS V2.0 ignition key IDs must
be carried out with CONSULT using NATS program card
(NATS-E940).
Therefore, be sure to receive all keys from vehicle
owner.
Regarding the procedures of NATS initialisation and
NATS ignition key ID registration, refer to CONSULT
operation manual, NATS V2.0.
SEF212NA
SEF288Q
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONKA
Malfunction Indicator Lamp (MIL) (Cont'd)
EC-43

DIAGNOSTIC TEST MODE IIÐHEATED OXYGEN SENSOR MONITOR
In this mode, the MALFUNCTION INDICATOR LAMP displays the condition of the fuel mixture (lean or rich)
which is monitored by the heated oxygen sensor.
MALFUNCTION INDICATOR LAMP Fuel mixture condition in the exhaust gasAir fuel ratio feedback control
condition
ON Lean
Closed loop control
OFF Rich
*Remains ON or OFF Any condition Open loop control
*: Maintains conditions just before switching to open loop.
To check the heated oxygen sensor function, start engine in the Diagnostic Test Mode II and warm it up
until engine coolant temperature indicator points to the middle of the gauge.
Next run engine at about 2,000 rpm for about 2 minutes under no-load conditions. Then make sure that the
MALFUNCTION INDICATOR LAMP comes ON more than 5 times every 10 seconds when measured at
2,000 rpm under no-load.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONKA
Malfunction Indicator Lamp (MIL) (Cont'd)
EC-44

FUNCTION TEST MODE
FUNCTION TEST
ITEMCONDITION JUDGEMENT CHECK ITEM (REMEDY)
SELF-DIAG
RESULTS
lIgnition switch: ON
(Engine stopped)
lDisplays the results of on board
diagnostic system.Ð Objective system
CLOSED THROTTLE
POSI
lIgnition switch: ON
(Engine stopped)
lThrottle position sensor circuit is
tested when throttle is opened
and closed fully. (``IDLE
POSITION'' is the test item name
for the vehicles in which idle is
selected by throttle position
sensor.)Throttle valve:
openedOFF
lHarness and connector
lThrottle position sensor (Closed
throttle position)
lThrottle position sensor (Closed
throttle position) adjustment
lThrottle linkage
lVerify operation in DATA
MONITOR mode. Throttle valve:
closedON
THROTTLE POSI
SEN CKT
lIgnition switch: ON
(Engine stopped)
lThrottle position sensor circuit is
tested when throttle is opened
and closed fully.Range (Throttle
valve fully opened
Ð Throttle valve
fully closed)More than
3.0V
lHarness and connector
lThrottle position sensor
lThrottle position sensor
adjustment
lThrottle linkage
lVerify operation in DATA
MONITOR mode.
PARK/NEUT POSI
SW CKT
lIgnition switch: ON
(Engine stopped)
lNeutral position switch circuit is
tested when shift lever is
manipulated.Out of N/P
positionsOFF
lHarness and connector
lNeutral position switch
lLinkage adjustment
In N/P positions ON
FUEL PUMP
CIRCUIT
lIgnition switch: ON
(Engine stopped)
lFuel pump circuit is tested by
checking the pulsation in fuel
pressure when fuel tube is
pinched.There is pressure pulsation on
the fuel feed hose.
lHarness and connector
lFuel pump
lFuel pump relay
lFuel filter clogging
lFuel level
EGRC SOL/V
CIRCUIT
(EVAP canister purge
control solenoid valve
circuit)
lIgnition switch: ON
(Engine stopped)
lEVAP canister purge control
solenoid valve circuit is tested by
checking solenoid valve operating
noise.The solenoid valve makes an
operating sound every 3
seconds.lHarness and connector
lEVAP canister purge control
solenoid valve
START SIGNAL
CIRCUIT
lIgnition switch: ON®START
lStart signal circuit is tested when
engine is started by operating the
starter. Battery voltage and water
temperature before cranking, and
average battery voltage, mass air
flow sensor output voltage and
cranking speed during cranking
are displayed.Start signal: OFF®ON
lHarness and connector
lIgnition switch
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONKA
CONSULT (Cont'd)
EC-51

FUNCTION TEST
ITEMCONDITION JUDGEMENT CHECK ITEM (REMEDY)
PW/ST SIGNAL
CIRCUIT
lIgnition switch: ON
(Engine running)
lPower steering oil pressure switch
circuit is tested when steering
wheel is rotated fully and then set
to a straight line running position.Locked position ONlHarness and connector
lPower steering oil pressure switch
lPower steering oil pump
Neutral position OFF
SWRL CONT S/V
CIRCUIT
lIgnition switch: ON
(Engine stopped)
lSwirl control valve control sole-
noid valve circuit is tested by
checking solenoid valve operating
sound.The solenoid valve makes an
operating sound every 3 sec-
onds.
lHarness and connector
lSolenoid valve
lSwirl control valve
lVacuum hose
VEHICLE SPEED
SEN CKT
lVehicle speed sensor circuit is
tested when vehicle is running at
a speed of 10 km/h (6 MPH) or
higher.Vehicle speed sensor input
signal is greater than 4 km/h
(2 MPH).lHarness and connector
lVehicle speed sensor
lSpeedometer
IGN TIMING ADJ
lAfter warming up, idle the engine.
lIgnition timing is checked by read-
ing ignition timing with a timing
light and checking whether it
agrees with specifications.The timing light indicates the
same value on the screen.
lAdjust ignition timing (by moving
camshaft position sensor or
distributor)
lCamshaft position sensor drive
mechanism
MIXTURE RATIO
TEST
lAir-fuel ratio feedback circuit
(injection system, ignition system,
vacuum system, etc.) is tested by
examining the heated oxygen
sensor output at 2,000 rpm under
non-loaded state.Heated oxygen sensor
COUNT: More than 5 times
during 10 seconds
lINJECTION SYS (Injector, fuel
pressure regulator, harness or
connector)
lIGNITION SYS (Spark plug,
ignition coil, power transistor
harness or connector)
lVACUUM SYS (Intake air leaks)
lHeated oxygen sensor circuit
lHeated oxygen sensor operation
lFuel pressure high or low
lMass air flow sensor
POWER BALANCE
lAfter warming up, idle the engine.
lInjector operation of each cylinder
is stopped one after another, and
resultant change in engine rota-
tion is examined to evaluate com-
bustion of each cylinder. (This is
only displayed for models where a
sequential multiport fuel injection
system is used.)Difference in engine speed is
greater than 25 rpm before
and after cutting off the injec-
tor of each cylinder.lInjector circuit (Injector, harness
or connector)
lIgnition circuit (Spark plug, igni-
tion coil, power transistor harness
or connector)
lCompression
lValve timing
IACV-AAC/V
SYSTEM
lAfter warming up, idle the engine.
lIACV-AAC valve system is tested
by detecting change in engine
speed when IACV-AAC valve
opening is changed to 0%, 20%
and 80%.Difference in engine speed is
greater than 150 rpm between
when valve opening is at 80%
and at 20%.
lHarness and connector
lIACV-AAC valve
lAir passage restriction between
air inlet and IACV-AAC valve
lIAS (Idle adjusting screw) adjust-
ment
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONKA
CONSULT (Cont'd)
EC-52