1999 NISSAN PRIMERA fuel pressure

13 DETECT MALFUNCTIONING PART
1. Connect heated oxygen sensor 1 (front) harness connector to heated oxygen sensor 1 (front).
2. Check fuel pressure regulator. Refer to EC-SR-32.
3. Check mass air flow sensor and its circuit.
Refer to EC-SR-120.
4. Check injector and its circuit.
Refer to EC-SR-302.
Clean or replace if necessary.
5. Check engine coolant temperature sensor and its circuit. Refer to EC-SR-132.
6. Check ECM function by substituting another known good ECM.
(ECM may be the cause of a problem, but this is rarely the case.)
©GO TO 5. (With CONSULT-II)
GO TO 6. (Without CONSULT-II)
IIf a vehicle contains a part which is operating outside of
design specifications with no MI illumination, the part
shall not be replaced prior to emission testing unless it is
determined that the part has been tampered with or
abused in such a way that the diagnostic system cannot
reasonably be expected to detect the resulting malfunc-
tion.
BASIC SERVICE PROCEDURESR20DE
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont'd)
EC-45

FREEZE FRAME DATA AND 1ST TRIP FREEZE FRAME DATANCEC0031S02The ECM records the driving conditions such as fuel system status, calculated load value, engine coolant
temperature, short term fuel trim, long term fuel trim, engine speed, vehicle speed and absolute pressure
sensor at the moment a malfunction is detected.
Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data.
The data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II or
GST. The 1st trip freeze frame data can only be displayed on the CONSULT-II screen, not on the GST. For
details, see EC-SR-71.
Only one set of freeze frame data (either 1st trip freeze frame data or freeze frame data) can be stored in the
ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no prior-
ity for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However, once
freeze frame data (2nd trip detection/MI on) is stored in the ECM memory, 1st trip freeze frame data is no
longer stored. Remember, only one set of freeze frame data can be stored in the ECM. The ECM has the fol-
lowing priorities to update the data.
Priority Items
1Freeze frame data Misfire Ð DTC: P0300 - P0304 (0300 - 0304)
Fuel Injection System Function Ð DTC: P0171 (0171), P0172 (0172)
2 Except the above items (Includes CVT related items)
3 1st trip freeze frame data
For example, the CVT malfunction (Priority: 2) was detected and the freeze frame data was stored in the 2nd
trip. After that when the misfire (Priority: 1) is detected in another trip, the freeze frame data will be updated
from the CVT malfunction to the misfire. The 1st trip freeze frame data is updated each time a different mal-
function is detected. There is no priority for 1st trip freeze frame data. However, once freeze frame data is
stored in the ECM memory, 1st trip freeze data is no longer stored (because only one freeze frame data or
1st trip freeze frame data can be stored in the ECM). If freeze frame data is stored in the ECM memory and
freeze frame data with the same priority occurs later, the first (original) freeze frame data remains unchanged
in the ECM memory.
Both 1st trip freeze frame data and freeze frame data (along with the DTCs) are cleared when the ECM
memory is erased. Procedures for clearing the ECM memory are described in ªHOW TO ERASE EMISSION-
RELATED DIAGNOSTIC INFORMATIONº. Refer to EC-SR-56.
SYSTEM READINESS TEST (SRT) CODENCEC0031S03System Readiness Test (SRT) code is specified in Mode 1 of ISO 15031-5. It indicates whether the self-diag-
nostic tests for non-continuously monitored items have been completed or not.
Inspection/Maintenance (I/M) tests of the on board diagnostic (OBD) II system may become the legal require-
ments in some states/areas. All SRT codes must be set in this case. Unless all SRT codes are set, conduct-
ing the I/M test may not be allowed.
SRT codes are set after self-diagnosis has been performed one or more times. This occurs regardless of
whether the diagnosis is in ªOKº or ªNGº, and whether or not the diagnosis is performed in consecutive trips.
The following table lists the four SRT items (14 test items) for the ECM used in P11 models.
SRT items Self-diagnostic test items
Catalyst monitoringIThree way catalyst function P0420 (0420)
Oxygen sensor monitoringIHeated oxygen sensor 1 (front) (Circuit) P0130 (0130)
IHeated oxygen sensor 1 (front) (Lean shift monitoring) P0131 (0131)
IHeated oxygen sensor 1 (front) (Rich shift monitoring) P0132 (0132)
IHeated oxygen sensor 1 (front) (Response monitoring) P0133 (0133)
IHeated oxygen sensor 1 (front) (High voltage) P0134 (0134)
IHeated oxygen sensor 2 (rear) (Min. voltage monitoring) P0137 (0137)
IHeated oxygen sensor 2 (rear) (Max. voltage monitoring) P0138 (0138)
IHeated oxygen sensor 2 (rear) (Response monitoring) P0139 (0139)
IHeated oxygen sensor 2 (rear) (High voltage) P0140 (0140)
Oxygen sensor heater monitoringIHeated oxygen sensor 1 (front) heater P0135 (0135)
IHeated oxygen sensor 2 (rear) heater P0141 (0141)
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONSR20DE
Emission-related Diagnostic Information (Cont'd)
EC-50

WORK SUPPORT MODENCEC0034S04
WORK ITEM CONDITION USAGE
IGNITION TIMING ADJIIGNITION TIMING FEEDBACK CONTROL WILL BE
HELD BY TOUCHING ªSTARTº. AFTER DOING SO,
ADJUST IGNITION TIMING WITH A TIMING LIGHT BY
TURNING THE CAMSHAFT POSITION SENSOR.When adjusting initial ignition tim-
ing
FUEL PRESSURE RELEASEIFUEL PUMP WILL STOP BY TOUCHING ªSTARTº
DURING IDLING.
CRANK A FEW TIMES AFTER ENGINE STALLS.When releasing fuel pressure
from fuel line
TARGET IDLE RPM ADJIIDLE CONDITION When setting target idle speed
TARGET IGNITION TIMING ADJIIDLE CONDITION When adjusting target ignition
timing
After adjustment, confirm target
ignition timing with a timing light.
SELF DIAGNOSTIC MODENCEC0034S05DTC and 1st Trip DTCNCEC0034S0501Regarding items of ªDTC and 1st trip DTCº, refer to
ªTROUBLE DIAGNOSIS Ð INDEXº, EC-SR-6.
Freeze Frame Data and 1st Trip Freeze Frame DataNCEC0034S0502
Freeze frame data
item*Description
DIAG TROUBLE
CODE
[PXXXX]IEngine Control component part/control system has a trouble code, it is displayed as ªPXXXXº. [Refer
to ªAlphabetical & P No. Index for DTCº (EC-SR-6).]
FUEL SYS DATAIªFuel injection system statusº at the moment a malfunction is detected is displayed.
IOne 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 [%]IThe calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [ÉC]
or [ÉF]IThe engine coolant temperature at the moment a malfunction is detected is displayed.
S-FUEL TRIM [%]IªShort-term fuel trimº at the moment a malfunction is detected is displayed.
IThe short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel
schedule.
L-FUEL TRIM [%]IªLong-term fuel trimº at the moment a malfunction is detected is displayed.
IThe long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule
than short-term fuel trim.
ENGINE SPEED [rpm]IThe engine speed at the moment a malfunction is detected is displayed.
VHCL SPEED [km/h]
or [mph]IThe vehicle speed at the moment a malfunction is detected is displayed.
*: The items are the same as those of 1st trip freeze frame data.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONSR20DE
CONSULT-II (Cont'd)
EC-71

Monitored item [Unit]ECM
input
signalsMain
signalsDescription Remarks
AIR COND SIG
[ON/OFF]qqIIndicates [ON/OFF] condition of the air
conditioner switch as determined by the
air conditioning signal.
P/N POSI SW
[ON/OFF]qqIIndicates [ON/OFF] condition from the
PNP switch signal.
PW/ST SIGNAL
[ON/OFF]qqIIndicates [ON/OFF] condition of the
power steering oil pressure switch deter-
mined by the power steering oil pressure
switch signal.
LOAD SIGNAL
[ON/OFF]qqIIndicates [ON/OFF] condition from the
electrical load signal and/or lighting
switch.
ON ... rear defogger is operating and/or
lighting switch is on.
OFF ... rear defogger is not operating
and lighting switch is not on.
IGNITION SW
[ON/OFF]qIIndicates [ON/OFF] condition from igni-
tion switch.
HEATER FAN SW
[ON/OFF]qIIndicates [ON/OFF] condition from the
heater fan switch.
INJ PULSE -B1
[msec]qIIndicates the actual fuel injection pulse
width compensated by ECM according to
the input signals.IWhen the engine is stopped, a cer-
tain computed value is indicated.
B/FUEL SCHDL
[msec]IªBase fuel scheduleº indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board cor-
rection.
IGN TIMING [BTDC]qIIndicates the ignition timing computed by
ECM according to the input signals.
IACV-AAC/V [step]qIIndicates the IACV-AAC valve control
value computed by ECM according to
the input signals.
A/F ALPHA -B1 [%]qIIndicates the mean value of the air-fuel
ratio feedback correction factor per
cycle.IWhen the engine is stopped, a cer-
tain value is indicated.
IThis data also includes the data for
the air-fuel ratio learning control.
AIR COND RLY
[ON/OFF]qIIndicates the air conditioner relay control
condition determined by ECM according
to the input signals.
FUEL PUMP RLY
[ON/OFF]qIIndicates the fuel pump relay control
condition determined by ECM according
to the input signals.
COOLING FAN
[HI/LOW/OFF]qIIndicates the control condition of the
cooling fan determined by ECM accord-
ing to the input signals.
HI ... High speed operation
LOW ... Low speed operation
OFF ... Stop
HO2S1 HTR (B1)
[ON/OFF]IIndicates [ON/OFF] condition of heated
oxygen sensor 1 (front) heater deter-
mined by ECM according to the input
signals.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONSR20DE
CONSULT-II (Cont'd)
EC-73

Symptom Matrix ChartNCEC0041SYSTEM Ð ENGINE CONTROL SYSTEMNCEC0041S01
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel pump circuit11232 22 3 2EC-SR-316
Fuel pressure regulator system334444444 4EC-SR-32
Injector circuit11232 22 2EC-SR-32
Evaporative emission system334444444 4EC-SR-27
Air Positive crankcase ventilation sys-
tem334444444 41EC-SR-30
Incorrect idle speed adjustment 3 31111 1EC-SR-34
IACV-AAC valve circuit112332222 2 2EC-SR-263
Ignition Incorrect ignition timing adjust-
ment33111 11 1EC-SR-34
Ignition circuit11222 22 2EC-SR-306
Main power supply and ground circuit22333 33 23 2EC-SR-115
Air conditioner circuit223333333 3 2HAsection
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONSR20DE
Symptom Matrix Chart
EC-94

SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Camshaft position sensor circuit22333 33 3EC-SR-
239
Mass air flow sensor circuit11222 22 2EC-SR-
120
Heated oxygen sensor 1 (front)
circuit1232 22 2EC-SR-
144, 150
Engine coolant temperature sen-
sor circuit112323223 2EC-SR-
132
Throttle position sensor circuit 1 222222 2EC-SR-
137
Incorrect throttle position sensor
adjustment31 11111 1EC-SR-84
Vehicle speed sensor circuit or
ABS actuator and electric unit
(control unit) circuit23 3 3EC-SR-
255
Knock sensor circuit 2 3EC-SR-
230
ECM 22333333333EC-SR-
277, 93
Start signal circuit 2EC-SR-
312
PNP switch circuit 3 3 3 3 3EC-SR-
298
Power steering oil pressure
switch circuit233EC-SR-
322
Electrical load signal circuit 3 3EC-SR-
326
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONSR20DE
Symptom Matrix Chart (Cont'd)
EC-95

DescriptionNLEC1748The specification (SP) value indicates the tolerance of the value that is displayed in ªDATA MONITOR (SPEC)º
mode of CONSULT-II during normal operation of the Engine Control System. When the value in ªDATA MONI-
TOR (SPEC)º mode is within the SP value, the Engine Control System is confirmed OK. When the value in
ªDATA MONITOR (SPEC)º mode is NOT within the SP value, the Engine Control System may have one or
more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MIL.
The SP value will be displayed for the following three items:
IB/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection)
IA/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)
IMAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Testing ConditionNLEC1749IVehicle driven distance: More than 5,000 km (3,107 miles)
IBarometric pressure: 98.3 - 104.3 kPa (0.983 - 1.043 bar, 1.003 - 1.064 kg/cm2, 14.25 - 15.12 psi)
IAtmospheric temperature: 20 - 30ÉC (68 - 86ÉF)
IEngine coolant temperature: 75 - 95ÉC (167 - 203ÉF)
ITransmission: Warmed-up*1
IElectrical load: Not applied*2
IEngine speed: Idle
*1: For after the engine is warmed up to normal operating temperature, drive vehicle until ªFLUID TEMP SEº
(CVT fluid temperature sensor signal) indicates less than 0.9V.
*2: Rear window defogger switch, air conditioner switch, lighting switch are ªOFFº. Cooling fans are not oper-
ating. Steering wheel is straight ahead.
SEF601Z
Inspection ProcedureNLEC1750NOTE:
Perform ªDATA MONITOR (SPEC)º mode in maximum scale dis-
play.
1. Perform ªBasic Inspectionº, EC-84.
2. Confirm that the testing conditions indicated above are met.
3. Select ªB/FUEL SCHDLº, ªA/F ALPHA-B1º and ªMAS A/F
SE-B1º in ªDATA MONITOR (SPEC)º mode with CONSULT-II.
4. Make sure that monitor items are within the SP value.
5. If NG, go to ªDiagnostic Procedureº, EC-111.
TROUBLE DIAGNOSIS Ð SPECIFICATION VALUESR20DE
Description
EC-110

On Board Diagnosis LogicNCEC0106To judge the malfunction, the output from the heated oxygen sen-
sor 1 (front) is monitored to determine whether the ªrichº output is
sufficiently high and whether the ªleanº output is sufficiently low.
When both the outputs are shifting to the lean side, the malfunc-
tion will be detected.
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0131
0131IThe maximum and minimum voltages from the sensor
are not reached to the specified voltages.IHeated oxygen sensor 1 (front)
IHeated oxygen sensor 1 (front) heater
IFuel pressure
IInjectors
IIntake air leaks
DTC Confirmation ProcedureNCEC0107CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch ªOFFº and wait at least 9 seconds
before conducting the next test.
TESTING CONDITION:
IAlways perform at a temperature above þ10ÉC (14ÉF).
IBefore performing the following procedure, confirm that
battery voltage is more than 11V at idle.
With CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Stop engine and wait at least 9 seconds.
3) Turn ignition switch ªONº and select ªHO2S1 P0131º of
ªHO2S1º in ªDTC WORK SUPPORTº mode with CONSULT-II.
4) Touch ªSTARTº.
5) Start engine and let it idle for at least 3.5 minutes.
NOTE:
Never raise engine speed above 3,200 rpm after this step. If
the engine speed limit is exceeded, return to step 5.
6) When the following conditions are met, ªTESTINGº will be dis-
played on the CONSULT-II screen. Maintain the conditions
continuously until ªTESTINGº changes to ªCOMPLETEDº. (It
will take approximately 20 seconds or more.)
SEF300U
SEF827Y
SEF828Y
SEF651Y
DTC P0131 HEATED OXYGEN SENSOR 1
(FRONT) (LEAN SHIFT MONITORING)SR20DE
On Board Diagnosis Logic
EC-151