NISSAN ALMERA 2001 Service Manual

MONITOR ITEM CONDITION SPECIFICATION
BARO SEN+Ignition switch: ONAltitude
Approx.0m(0ft): Approx. 100.62
kPa (1.0062 bar, 1.026 kg/cm
2,
14.59 psi)
Approx. 1,000 m (3,281 ft): Approx.
88.95 kPa (0.8895 bar, 0.907
kg/cm
2, 12.90 psi)
Approx. 1,500 m (4,922 ft): Approx.
83.16 kPa (0.8316 bar, 0.848
kg/cm
2, 12.06 psi)
Approx. 2,000 m (6,562 ft): Approx.
78.36 kPa (0.7836 bar, 0.799
kg/cm
2, 11.36 psi)
EGR VOL CON/V+Engine: After warming up
+Air conditioner switch: ªOFFº
+Shift lever: Neutral position
+No-loadAfter one minute at idle More than 10 steps
Revving engine from idle to 3,200
rpm0 steps
*1: On models not equipped with park/neutral position (PNP) switch, ªOFFº is always displayed regardless of gear shift position.
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONYD
CONSULT-II Reference Value in Data Monitor Mode (Cont'd)
EC-657

Major Sensor Reference Graph in Data Monitor
Mode
=NJEC0635The following are the major sensor reference graphs in ªDATA MONITORº mode.
ACCEL POS SEN, ªCKPS´RPM (TDC)º, ªMAS AIR/FL SEºNJEC0635S01Below is the data for ªACCEL POS SENº, ªCKPS´RPM (TDC)º and ªMAS AIR/FL SEº when revving engine
quickly up to 3,000 rpm under no load after warming up engine to the normal operating temperature.
Each value is for reference, the exact value may vary.
SEF321Y
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONYD
Major Sensor Reference Graph in Data Monitor Mode
EC-658

SEF396Y
ECM Terminals and Reference ValueNJEC0636PREPARATIONNJEC0636S01Models with ECM in Engine CompartmentNJEC0636S01011. ECM is located on the left side under the cowl panel (behind
the strut tower). For the inspection, perform the following pro-
cedure.
SEF322Y
a. Remove the engine control harness fixing clips.
SEF323Y
b. Remove the ventilation hose.
+To release the lock, push the quick connector.
SEF324Y
c. Remove the ECM cover mounting bolts, then remove the ECM
cover from the vehicle.
: 4.0 - 7.8 N´m (0.4 - 0.8 kg-m, 35 - 69 in-lb)
d. Remove the ECM cover bolts, then open the ECM cover.
: 4.0 - 6.8 N´m (0.4 - 0.7 kg-m, 35 - 60 in-lb)
e. Remove the ECM bolts.
: 4.2 - 6.7 N´m (0.42 - 0.69 kg-m, 37 - 59 in-lb)
f. Install in the reverse order of removal.
SEF289H
2. Disconnect negative battery terminal.
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONYD
ECM Terminals and Reference Value
EC-659

SEF883Y
3. Connect a break out box (SST) between the ECM and ECM
harness connectors.
+Use extreme care not to touch 2 pins at one time.
+Data is for comparison and may not be exact.
+Be sure ECM unit is properly grounded before checking.
SEF289H
Models with ECM in cabinNJEC0636S0102ECM is locating beside of blower unit.
1. Remove the ECM bracket fixing.
2. Remove ECM harness protector.
3. Disconnect negative battery terminal.
SEF883Y
4. Connect a break out box (SST) between the ECM and ECM
harness connectors.
+Use extreme care not to touch 2 pins at one time.
+Data is for comparison and may not be exact.
+Be sure ECM unit is properly grounded before checking.
ECM HARNESS CONNECTOR TERMINAL LAYOUTNJEC0636S02
SEF435Z
ECM INSPECTION TABLENJEC0636S03Remarks: Specification data are reference values and are mea-
sured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM's
transistor. Use a ground other than ECM terminals, such as
the ground.
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONYD
ECM Terminals and Reference Value (Cont'd)
EC-660

TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA (DC Voltage and Pulse
Signal)
104
105
106B
B
BECM ground[Engine is running]
+Idle speedApproximately 0V
107
108
109R
R
RPower supply for ECM[Ignition switch ªONº]BATTERY VOLTAGE
(11 - 14V)
204 L Air conditioner relay[Engine is running]
+Air conditioner switch is ªOFFºBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
+Both air conditioner switch and blower fan
switch are ªONº
(Compressor is operating)Approximately 0.1V
214 W/B Glow relay Refer to ªGlow Control Systemº, EC-806.
218 B Sensors' ground[Engine is running]
+Warm-up condition
+Idle speedApproximately 0V
219 LG/R Cooling fan relay (Low)[Engine is running]
+Cooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
+Cooling fan is operatingApproximately 0.1V
221 LG/B Cooling fan relay (High)[Engine is running]
+Cooling fan is not operating
+Cooling fan is operating at low speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
+Cooling fan is operating at high speedApproximately 0.1V
223 WMass air flow sensor
power supply[Ignition switch ªONº]Approximately 5V
224 R Mass air flow sensor[Engine is running]
+Warm-up condition
+Idle speed1.5 - 2.0V
313 L/WElectronic control fuel
injection pump[Engine is running]
+Warm-up condition
+Idle speedApproximately 0.1V
314 L/RElectronic control fuel
injection pump[Engine is running]
+Warm-up condition
+Idle speedApproximately 0.4V
316 PUElectronic control fuel
injection pump[Engine is running]
+Warm-up condition
+Idle speedApproximately 2.5V
317 PElectronic control fuel
injection pump[Engine is running]
+Warm-up condition
+Idle speedApproximately 2.5V
325 G ECM relay (Self-shutoff)[Ignition switch ªONº]
[Ignition switch ªOFFº]
+For a few seconds after turning ignition switch
ªOFFºApproximately 0.25V
[Ignition switch ªOFFº]
+A few seconds passed after turning ignition
switch ªOFFºBATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONYD
ECM Terminals and Reference Value (Cont'd)
EC-661

TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA (DC Voltage and Pulse
Signal)
331 ORCrankshaft position sen-
sor (TDC) ground[Engine is running]
+Warm-up condition
+Idle speedApproximately 0V
334 B/REngine coolant tempera-
ture sensor ground[Ignition switch ªONº]Approximately 0V
337
338
350
351W/L
PU/W
GY
OR/BEGR volume control
valve[Engine is running]
+Warm-up condition
+Idle speed0.1 - 14V
(Voltage signals of each ECM
terminals differ according to the
control position of EGR volume
control valve.)
344 WCrankshaft position sen-
sor (TDC)[Engine is running]
+Warm-up condition
+Idle speedApproximately 0V
SEF333Y
[Engine is running]
+Warm-up condition
+Engine speed is 2,000 rpmApproximately 0V
SEF334Y
347 L/BEngine coolant tempera-
ture sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with
engine coolant temperature
403 R/L Air conditioner switch[Engine is running]
+Air conditioner switch is ªOFFºBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
+Both air conditioner switch and blower fan
switch are ªONº
(Compressor is operating)Approximately 0.1V
405 R/G Stop lamp switch[Ignition switch ªONº]
+Brake pedal fully releasedApproximately 0V
[Ignition switch ªONº]
+Brake pedal depressedBATTERY VOLTAGE
(11 - 14V)
416 Y/BBrake pedal position
switch[Ignition switch ªONº]
+Brake pedal fully releasedBATTERY VOLTAGE
(11 - 14V)
[Ignition switch ªONº]
+Brake pedal depressedApproximately 0V
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONYD
ECM Terminals and Reference Value (Cont'd)
EC-662

TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA (DC Voltage and Pulse
Signal)
417 PU/R Vehicle speed sensor[Engine is running]
+Lift up the vehicle
+In 1st gear position
+Vehicle speed is 10 km/h (6 MPH)0 - Approximately 8V
SEF891Y
[Engine is running]
+Lift up the vehicle
+In 2nd gear position
+Vehicle speed is 30 km/h (19 MPH)Approximately 6V
SEF892Y
418 G/ORPark/Neutral position
switch (where fitted)[Ignition switch ªONº]
+Gear position is ªNeutralºApproximately 0V
[Ignition switch ªONº]
+Except the above gear positionBATTERY VOLTAGE
(11 - 14V)
422 B/Y Start signal[Ignition switch ªONº]Approximately 0V
[Ignition switch ªSTARTº]BATTERY VOLTAGE
(11 - 14V)
425 P/BAccelerator position sen-
sor ground[Engine is running]
+Warm-up condition
+Idle speedApproximately 0V
426 BR/RAccelerator position
switch (Idle) ground[Ignition switch ªONº]Approximately 0V
433 G/YAccelerator position sen-
sor power supply[Ignition switch ªONº]Approximately 5V
434 WAccelerator position sen-
sor[Ignition switch ªONº]
+Accelerator pedal fully released0.30 - 0.50V
[Ignition switch ªONº]
+Accelerator pedal fully depressed3.0 - 4.3V
435 W/GAccelerator position
switch (Idle)[Ignition switch ªONº]
+Accelerator pedal fully releasedApproximately 0V
[Ignition switch ªONº]
+Accelerator pedal depressedBATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONYD
ECM Terminals and Reference Value (Cont'd)
EC-663

TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA (DC Voltage and Pulse
Signal)
439 L/OR Tachometer[Engine is running]
+Warm-up condition
+Idle speedApproximately 4.8V
SEF325Y
[Engine is running]
+Warm-up condition
+Engine speed is 2,000 rpmApproximately 4.6V
SEF326Y
505 OR/L Malfunction indicator[Ignition switch ªONº]Approximately 1V
[Engine is running]
+Idle speedBATTERY VOLTAGE
(11 - 14V)
507 W/R Ignition switch[Ignition switch ªOFFº]0V
[Ignition switch ªONº]BATTERY VOLTAGE
(11 - 14V)
508 OR Glow lamp[Ignition switch ªONº]
+Glow lamp is ªONºApproximately 1V
[Ignition switch ªONº]
+Glow lamp is ªOFFºBATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONYD
ECM Terminals and Reference Value (Cont'd)
EC-664

DescriptionNJEC0637Intermittent incidents (I/I) may occur. In many cases, the problem resolves itself (the part or circuit function
returns to normal without intervention). It is important to realize that the symptoms described in the custom-
er's complaint often do not recur on DTC visits. Realize also that the most frequent cause of I/I occurrences
is poor electrical connections. Because of this, the conditions under which the incident occurred may not be
clear. Therefore, circuit checks made as part of the standard diagnostic procedure may not indicate the spe-
cific problem area.
COMMON I/I REPORT SITUATIONSNJEC0637S01
STEP in Work Flow Situation
II The CONSULT-II is used. The SELF-DIAG RESULTS screen shows time data other than ª0º.
III The symptom described by the customer does not recur.
IV DTC does not appear during the DTC Confirmation Procedure.
VI The Diagnostic Procedure for XXXX does not indicate the problem area.
Diagnostic ProcedureNJEC0638
1 INSPECTION START
Erase DTCs. Refer to ªHOW TO ERASE DTCº, EC-627.
©GO TO 2.
2 CHECK GROUND TERMINALS
Check ground terminals for corroding or loose connection.
Refer to GI-22, ªGROUND INSPECTIONº.
OK or NG
OK©GO TO 3.
NG©Repair or replace.
3 SEARCH FOR ELECTRICAL INCIDENT
Perform GI-22, ªIncident Simulation Testsº.
OK or NG
OK©INSPECTION END
NG©Repair or replace.
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTYD
Description
EC-665

Main Power Supply and Ground Circuit
ECM TERMINALS AND REFERENCE VALUENJEC0639Remarks: Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA(DC Voltage)
104
105
106B
B
BECM ground[Engine is running]
+Idle speedApproximately 0V
107
108
109R
R
RPower supply for ECM[Ignition switch ªONº]BATTERY VOLTAGE
(11 - 14V)
325 G ECM relay (Self-shutoff)[Ignition switch ªONº]
[Ignition switch ªOFFº]
+For a few seconds after turning ignition switch
ªOFFºApproximatley 0.25V
[Ignition switch ªOFFº]
+A few seconds passed after turning ignition
switch ªOFFºBATTERY VOLTAGE
(11 - 14V)
507 W/R Ignition switch[Ignition switch ªOFFº]0V
[Ignition switch ªONº]BATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS FOR POWER SUPPLYYD
Main Power Supply and Ground Circuit
EC-666