2001 NISSAN PICK-UP coolant

SEC687C
A particular trouble code can be identified by the number of four-digit numeral flashes. The ªzeroº is indicated
by the number of ten flashes. The length of time the 1,000th-digit numeral flashes on and off is 1.2 seconds
consisting of an ON (0.6-second) - OFF (0.6-second) cycle.
The 100th-digit numeral and lower digit numerals consist of a 0.3-second ON and 0.3-second OFF cycle.
A change from one digit numeral to another occurs at an interval of 1.0-second OFF. In other words, the later
numeral appears on the display 1.3 seconds after the former numeral has disappeared.
A change from one trouble code to another occurs at an interval of 1.8-second OFF.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC ª0000º refers to no
malfunction. (See ªTROUBLE DIAGNOSIS Ð INDEXº, EC-3009.)
How to Erase Diagnostic Test Mode II (Self-diagnostic Results)
NEEC0032S1101The DTC can be erased from the back up memory in the ECM by depressing accelerator pedal. Refer to How
to Switch Diagnostic Test Mode.
+If the battery is disconnected, the DTC will be lost from the backup memory after approx 24 hours.
+Be careful not to erase the stored memory before starting trouble diagnoses.
Diagnostic Test Mode II Ð Heated Oxygen Sensor 1 MonitorNEEC0032S12In this mode, the MI displays the condition of the fuel mixture (lean or rich) which is monitored by the heated
oxygen sensor 1.
MI Fuel mixture condition in the exhaust gas Air fuel ratio feedback control condition
ON Lean
Closed loop system
OFF Rich
*Remains ON or OFF Any condition Open loop system
*: Maintains conditions just before switching to open loop.
To check the heated oxygen sensor 1 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
MI comes ON more than 5 times within 10 seconds with engine running at 2,000 rpm under no-load.
OBD System Operation ChartNEEC0033RELATIONSHIP BETWEEN MI, DTC, 1ST TRIP DTC AND DETECTABLE ITEMSNEEC0033S01+When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data are
stored in the ECM memory.
+When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are
stored in the ECM memory, and the MI will come on. For details, refer to ªTwo Trip Detection Logicº on
EC-3049.
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION
KA24DE (EURO OBD)
Malfunction Indicator (MI)
EC-3064

EXPLANATION FOR DRIVING PATTERNS FOR ªMISFIRE DETERIORATION>º, ªFUEL INJECTION SYSTEMº
NEEC0033S04Driving Pattern BNEEC0033S0401Driving pattern B means the vehicle operation as follows:
All components and systems should be monitored at least once by the OBD system.
+The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.
+The B counter will be counted up when driving pattern B is satisfied without any malfunction.
+The MI will go off when the B counter reaches 3. (*2 in ªOBD SYSTEM OPERATION CHARTº)
Driving Pattern CNEEC0033S0402Driving pattern C means the vehicle operation as follows:
1) The following conditions should be satisfied at the same time:
Engine speed: (Engine speed in the freeze frame data)±375 rpm
Calculated load value: (Calculated load value in the freeze frame data)´(1±0.1) [%]
Engine coolant temperature (T) condition:
+When the freeze frame data shows lower than 70ÉC (158ÉF), ªTº should be lower than 70ÉC (158ÉF).
+When the freeze frame data shows higher than or equal to 70ÉC (158ÉF), ªTº should be higher than or
equal to 70ÉC (158ÉF).
Example:
If the stored freeze frame data is as follows:
Engine speed: 850 rpm, Calculated load value: 30%, Engine coolant temperature: 80ÉC (176ÉF)
To be satisfied with driving pattern C, the vehicle should run under the following conditions:
Engine speed: 475 - 1,225 rpm, Calculated load value: 27 - 33%, Engine coolant temperature: more than 70ÉC
(158ÉF)
+The C counter will be cleared when the malfunction is detected regardless of (1).
+The C counter will be counted up when (1) is satisfied without the same malfunction.
+The DTC will not be displayed after C counter reaches 80.
+The 1st trip DTC will be cleared when C counter is counted once without the same malfunction after DTC
is stored in ECM.
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION
KA24DE (EURO OBD)
OBD System Operation Chart
EC-3067

ENGINE CONTROL COMPONENT PARTS/CONTROL
SYSTEMS APPLICATION
NEEC0034S02
ItemDIAGNOSTIC TEST MODE
WORK
SUP-
PORTSELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TORDATA
MONI-
TOR
(SPEC)ACTIVE
TESTSRT
CONFIRMATION
DTC*1FREEZE
FRAME
DATA*2SRT
STA-
TUSDTC
WORK
SUP-
PORT
ENGINE CONTROL COMPONENT PARTS
INPUTCamshaft position sensorXXXX
Mass air flow sensor X X X
Engine coolant temperature
sensorXXXXX
Heated oxygen sensor 1 X X X X X
Heated oxygen sensor 2 X X X X X
Vehicle speed sensorXXXX
Throttle position sensor X X X X
Intake air temperature sen-
sorXXX
Crankshaft position sensor
(OBD)X
Knock sensor X
Ignition switch (start signal) X X
Closed throttle position
switchXXX
Closed throttle position
switch (throttle position sen-
sor signal)XX
Air conditioner switch X X
Park/Neutral position (PNP)
switchXXX
Power steering oil pressure
switchXX
Air conditioner pressure
switchXX
Battery voltage X X
Ambient air temperature
switchXX
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION
KA24DE (EURO OBD)
CONSULT-II
EC-3071

WORK SUPPORT MODENEEC0034S04
WORK ITEM CONDITION USAGE
TP SW/TP SEN IDLE POSI ADJ+FOLLOW THE BASIC INSPECTION IN THE SERVICE
MANUALWhen adjusting the idle throttle
position
IGNITION TIMING ADJ*+IGNITION TIMING FEEDBACK CONTROL WILL BE
HELD BY TOUCHING ªSTARTº. AFTER DOING SO,
ADJUST IGNITION TIMING WITH A TIMING LIGHT
BY TURNING THE CRANKSHAFT POSITION SEN-
SOR.When adjusting initial ignition tim-
ing
FUEL PRESSURE RELEASE+FUEL PUMP WILL STOP BY TOUCHING ªSTARTº
DURING 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
COEFFICIENT.When releasing fuel pressure
from fuel line
TARGET IDLE RPM ADJ*+IDLE CONDITION When setting target idle speed
*: This function is not necessary in the usual service procedure.
SELF DIAGNOSTIC MODENEEC0034S05DTC and 1st Trip DTCNEEC0034S0501Regarding items of ªDTC and 1st trip DTCº, refer to
ªTROUBLE DIAGNOSIS Ð INDEXº, EC-3009.
Freeze Frame Data and 1st Trip Freeze Frame DataNEEC0034S0502
Freeze frame data
item*Description
DIAG TROUBLE
CODE
[PXXXX]+Engine Control component part/control system has a trouble code, it is displayed as ªPXXXXº. [Refer to
ªAlphabetical & P No. Index for DTCº (EC-3009).]
FUEL SYS-B1+ªFuel injection system statusº at the moment a malfunction is detected is displayed.
+One mode in the following is displayed.
ªMODE 2º: Open loop due to detected system malfunction
ªMODE 3º: Open loop due to driving conditions (power enrichment, deceleration enrichment)
ªMODE 4º: Closed loop - using oxygen sensor(s) as feedback for fuel control
ªMODE 5º: Open loop - has not yet satisfied condition to go to closed loop
CAL/LD VALUE [%]+The calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [ÉC]
or [ÉF]+The engine coolant temperature at the moment a malfunction is detected is displayed.
S-FUEL TRIM-B1 [%]+ªShort-term fuel trimº 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.
L-FUEL TRIM-B1 [%]+ªLong-term fuel trimº 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.
ENGINE SPEED
[rpm]+The engine speed at the moment a malfunction is detected is displayed.
VEHICLE 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.
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION
KA24DE (EURO OBD)
CONSULT-II
EC-3073

Freeze frame data
item*Description
INT/A TEMP SE [ÉC]
or [ÉF]+The intake air temperature at the moment a malfunction is detected is displayed.
*: The items are the same as those of 1st trip freeze frame data.
DATA MONITOR MODENEEC0034S06
Monitored item [Unit]ECM
input
signalsMain
signalsDescription Remarks
ENG SPEED [rpm]jj+Indicates the engine speed computed
from the REF signal (180É signal) of
the camshaft position sensor.+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]jj+The signal voltage of the mass air flow
sensor is displayed.+When the engine is stopped, a cer-
tain value is indicated.
B/FUEL SCHDL [msec]j+ªBase fuel scheduleº indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board
correction.
A/F ALPHA-B1 [%]j+Indicates the mean value of the air-fuel
ratio feedback correction factor per
cycle.+When the engine is stopped, a cer-
tain value is indicated.
+This data also includes the data for
the air-fuel ratio learning control.
COOLAN TEMP/S
[ÉC] or [ÉF]jj+The engine coolant temperature (deter-
mined by the signal voltage of the
engine coolant temperature sensor) is
displayed.+When the engine coolant temperature
sensor is open or short-circuited,
ECM enters fail-safe mode. The
engine coolant temperature deter-
mined by the ECM is displayed.
HO2S1 (B1) [V]jj+The signal voltage of the heated oxy-
gen sensor 1 is displayed.
HO2S2 (B1) [V]j+The signal voltage of the heated oxy-
gen sensor 2 is displayed.
HO2S1 MNTR (B1)
[RICH/LEAN]jj+Display of heated oxygen sensor 1 sig-
nal during air-fuel ratio feedback con-
trol:
RICH ... means the mixture became
ªrichº, and control is being affected
toward a leaner mixture.
LEAN ... means the mixture became
ªleanº, and control is being affected
toward a rich mixture.+After turning ON the ignition switch,
ªRICHº is displayed until air-fuel mix-
ture ratio feedback control begins.
+When the air-fuel ratio feedback is
clamped, the value just before the
clamping is displayed continuously.
HO2S2 MNTR (B1)
[RICH/LEAN]j+Display of heated oxygen sensor 2 sig-
nal:
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 cer-
tain value is indicated.
VHCL SPEED SE
[km/h] or [mph]jj+The vehicle speed computed from the
vehicle speed sensor signal is dis-
played.
BATTERY VOLT [V]jj+The power supply voltage of ECM is
displayed.
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION
KA24DE (EURO OBD)
CONSULT-II
EC-3074

TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
IGNITION TIMING+Engine: Return to the original
trouble condition
+Timing light: Set
+Retard the ignition timing using
CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.+Adjust initial ignition timing
IACV-AAC/V
OPENING+Engine: After warming up, idle
the engine.
+Change the IACV-AAC valve
opening percent using CON-
SULT-II.Engine speed changes according
to the opening percent.+Harness and connector
+IACV-AAC valve
POWER BAL-
ANCE+Engine: After warming up, idle
the engine.
+Air conditioner switch ªOFFº
+Shift lever ªNº
+Cut off each injector signal one
at a time using CONSULT-II.Engine runs rough or dies.+Harness and connector
+Compression
+Injectors
+Power transistor
+Spark plugs
+Ignition coils
ENG COOLANT
TEMP+Engine: Return to the original
trouble condition
+Change the engine coolant tem-
perature indication using CON-
SULT-II.If trouble symptom disappears, see
CHECK ITEM.+Harness and connector
+Engine coolant temperature sen-
sor
+Fuel injectors
FUEL PUMP
RELAY+Ignition switch: ON
(Engine stopped)
+Turn the fuel pump relay ªONº
and ªOFFº using CONSULT-II
and listen to operating sound.Fuel pump relay makes the operat-
ing sound.+Harness and connector
+Fuel pump relay
PURG VOL
CONT/V+Engine: After warming up, run
engine at 1,500 rpm.
+Change the EVAP canister
purge volume control solenoid
valve opening percent using
CONSULT-II.Engine speed changes according
to the opening percent.+Harness and connector
+EVAP canister purge volume
control solenoid valve
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION
KA24DE (EURO OBD)
CONSULT-II
EC-3077

3 CHECK FI CAM FUNCTION
With CONSULT-II
1. Adjust accelerator wire. Refer to ªAdjust Accelerator Wireº, FE section.
2. Warm up engine to 75ÉC (167ÉF).
3. Stop engine and wait at least 5 seconds, then turn ignition switch ON.
4. Select ªCOOLAN TEMP/Sº in ªDATA MONITORº mode with CONSULT-II.
5. When the engine coolant temp is 75 to 85ÉC (167 to 185ÉF), confirm the clearance is less than 0.05 mm (0.0020 in),
between stopper and throttle drum as shown in the figure.
AEC871A
OK or NG
OK©GO TO 6.
NG©1. Replace throttle body assembly. Refer to ªOUTER COMPONENT PARTSº, EM sec-
tion.
2. GO TO 6.
4 CHECK FI CAM FUNCTION
With GST
1. Adjust accelerator wire. Refer to ªAdjust Accelerator Wireº, FE section.
2. Warm up engine to 75ÉC (167ÉF).
3. Stop engine and wait at least 10 seconds, then turn ignition switch ON.
4. Select ªMODE 1º with GST.
5. When the engine coolant temp is 75 to 85ÉC (167 to 185ÉF), confirm the clearance is less than 0.05 mm (0.0020 in),
between stopper and throttle drum as shown in the figure.
AEC871A
OK or NG
OK (With CONSULT-II)©GO TO 6.
OK (Without CONSULT-
II)©GO TO 14.
NG©1. Replace throttle body assembly. Refer to ªOUTER COMPONENT PARTSº, EM sec-
tion.
2. With CONSULT-II: GO TO 6.
Without CONSULT-II: GO TO 14.
TROUBLE DIAGNOSIS Ð BASIC
INSPECTION
KA24DE (EURO OBD)
Basic Inspection
EC-3087

5 CHECK FI CAM FUNCTION
No Tools
1. Adjust accelerator wire. Refer to ªAdjust Accelerator Wireº, FE section.
2. Disconnect engine coolant temperature sensor harness connector and check resistance as shown in the figure.
SEF536H
3. Warm up engine until the resistance of coolant temperature sensor is 0.26 to 0.39 kW.
4. Turn ignition switch OFF.
5. When engine coolant temperature is 75 to 85ÉC (167 to 185ÉF), with the voltage between 1.10 to 1.36V, make sure that
the clearance is less than 0.05 mm (0.0020 in), between stopper and throttle adjusting screw as shown in figure.
AEC871A
OK or NG
OK©GO TO 14.
NG©1. Replace throttle body assembly. Refer to ªOUTER COMPONENT PARTSº, EM sec-
tion.
2. GO TO 14.
TROUBLE DIAGNOSIS Ð BASIC
INSPECTION
KA24DE (EURO OBD)
Basic Inspection
EC-3088