NISSAN ALMERA N16 2003 Electronic Repair Manual

TROUBLE DIAGNOSIS
EC-461
[QG (WITHOUT EURO-OBD)]
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22
23
41
42G/B
R/B
L/B
Y/BInjector No. 3
Injector No. 1
Injector No. 4
Injector No. 2[Engine is running]
●Warm-up condition
●Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm.BATTERY VOLTAGE
(11 - 14V)
24 GHeated oxygen sensor 1
heater[Engine is running]
●Warm-up condition
●Engine speed is below 3,200 rpm (A/T
models).
●Engine speed is below 3,600 rpm (M/T
models).Approximately 7.0V
[Ignition switch “ON”]
●Engine stopped.
[Engine is running]
●Engine speed is above 3,200 rpm (A/T
models).
●Engine speed is above 3,600 rpm (M/T
models).BATTERY VOLTAGE
(11 - 14V)
29 BCamshaft position sensor
(PHASE) ground[Engine is running]
●Idle speedApproximately 0V
30 BCrankshaft position sensor
(POS) ground[Engine is running]
●Idle speedApproximately 0V
34 BRIntake air temperature
sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with
intake air temperature.
35 W Heated oxygen sensor 1[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm.0 - Approximately 1.0V
(Periodically change)
45 RSensor power supply
(Mass air flow sensor)[Ignition switch “ON”]Approximately 5V
46 RSensor power supply
(Refrigerant pressure
sensor)[Ignition switch “ON”]Approximately 5V
47 GSensor power supply
(Throttle position sensor)[Ignition switch “ON”]Approximately 5V TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0529E
PBIB0530E
PBIB0519E

EC-462
[QG (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
49 W Throttle position sensor 1[Ignition switch “ON”]
●Engine stopped.
●Shift lever position is ″D″ (A/T models).
●Shift lever position is “1st” (M/T models).
●Accelerator pedal fully released.More than 0.36V
[Ignition switch “ON”]
●Engine stopped.
●Shift lever position is ″D″ (A/T models).
●Shift lever position is “1st” (M/T models).
●Accelerator pedal fully depressed.Less than 4.75V
50 Y Mass air flow sensor[Engine is running]
●Warm-up condition
●Idle speed1.0 - 1.7V
[Engine is running]
●Warm-up condition
●Engine speed is 2,500 rpm.1.5 - 2.1V
54 -Sensor ground
(Knock sensor shield circuit)[Engine is running]
●Idle speedApproximately 0V
57 BSensor ground
(Power steering pressure
sensor/Refrigerant pressure
sensor)[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
60
61
79
80L/R
BR
GY/R
PUIgnition signal No. 3
Ignition signal No. 1
Ignition signal No. 4
Ignition signal No. 2[Engine is running]
●Warm-up condition
●Idle speed0 - 0.1V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm.0 - 0.2V TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0521E
PBIB0522E

TROUBLE DIAGNOSIS
EC-463
[QG (WITHOUT EURO-OBD)]
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62 Y/RIntake valve timing control
solenoid valve[Engine is running]
●Warm-up condition
●Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Warm-up condition
●When revving engine up to 2,000 rpm
quickly.7 - 10V
65 GSensor power supply
(Power steering pressure
sensor)[Ignition switch “ON”]Approximately 5V
66 BSensor ground
(Throttle position sensor)[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
67 BSensor ground
(Mass air flow sensor)[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
68 R Throttle position sensor 2[Ignition switch “ON”]
●Engine stopped.
●Shift lever position is ″D″ (A/T models).
●Shift lever position is “1st” (M/T models).
●Accelerator pedal fully released.Less than 4.75V
[Ignition switch “ON”]
●Engine stopped.
●Shift lever position is ″D″ (A/T models).
●Shift lever position is “1st” (M/T models).
●Accelerator pedal fully depressed.More than 0.36V
69 L Refrigerant pressure sensor[Engine is running]
●Warm-up condition
●Both A/C switch and blower switch are
“ON”.
(Compressor operates.)1.0 - 4.0V
72 BR/WEngine coolant temperature
sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with
engine coolant temperature.
73 BSensor ground
(Engine coolant temperature
sensor)[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
74 BSensor ground
(Heated oxygen sensor)[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
MBIB0052E
PBIB0532E

EC-464
[QG (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
82 BSensor ground
(Accelerator pedal position
sensor 1)[Engine is running]●Warm-up condition
●Idle speedApproximately 0V
83 BSensor ground
(Accelerator pedal position
sensor 2)[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
84 R/YElectrical load signal
(Headlamp signal)[Ignition switch “ON”]
●Lighting switch is ″2nd″ position.BATTERY VOLTAGE
(11 - 14V)
[Ignition switch “ON”]
●Lighting switch is ″OFF″.Approximately 0V
85 LG DATA link connector[Ignition switch “ON”]
●CONSULT-II or GST is disconnected.BATTERY VOLTAGE
(11 - 14V)
86 R CAN communication line[Ignition switch “ON”]Approximately 2.3V
90 RSensor power supply
(Accelerator pedal position
sensor 1)[Ignition switch “ON”]Approximately 5V
91 GSensor power supply
(Accelerator pedal position
sensor 2)[Ignition switch “ON”]Approximately 5V
94 L CAN communication line[Ignition switch “ON”]Approximately 2.8V
98 LGAccelerator pedal position
sensor 2[Ignition switch “ON”]
●Engine stopped.
●Accelerator pedal fully released.0.175 - 0.335V
[Ignition switch “ON”]
●Engine stopped.
●Accelerator pedal fully depressed.More than 1.95V
101 R/G Stop lamp switch[Ignition switch “ON”]
●Brake pedal fully released.Approximately 0V
[Ignition switch “ON”]
●Brake pedal fully depressed.BATTERY VOLTAGE
(11 - 14V)
102P (A/T)
G/OR
(M/T)PNP switch[Ignition switch “ON”]
●Shift lever position is ″P″ or ″N″ (A/T mod-
els).
●Shift lever position is ″Neutral″ (M/T mod-
els).Approximately 0V
[Ignition switch “ON”]
●Except the above gear position.Approximately 5V
104 OR Throttle control motor relay[Ignition switch “OFF”]BATTERY VOLTAGE
(11 - 14V)
[Ignition switch “ON”]0 - 1.0V
106 LAccelerator pedal position
sensor 1[Ignition switch “ON”]
●Engine stopped.
●Accelerator pedal fully released.0.35 - 0.67V
[Ignition switch “ON”]
●Engine stopped.
●Accelerator pedal fully depressed.More than 3.9V TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)

TROUBLE DIAGNOSIS
EC-465
[QG (WITHOUT EURO-OBD)]
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: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
CONSULT-II FunctionEBS00KF0
FUNCTION
*1: 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
●1st trip freeze frame data
●Others109 B/R Ignition switch[Ignition switch “OFF”]0V
[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
111 W/G ECM relay (Self shut-off)[Engine is running]
[Ignition switch “OFF”]
●For 5 seconds after turning ignition switch
“OFF”.0 - 1.0V
[Ignition switch “OFF”]
●5 seconds passed after turning ignition
switch “OFF”.BATTERY VOLTAGE
(11 - 14V)
113 B/P Fuel pump relay[Ignition switch “ON”]
●For 1 second after turning ignition switch
“ON”.
[Engine is running]0 - 1.0V
[Ignition switch “ON”]
●More than 1 second after turning ignition
switch “ON”.BATTERY VOLTAGE
(11 - 14V)
11 5
11 6B
BECM ground[Engine is running]
●Idle speedEngine ground
11 9
120W
WPower supply for ECM[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
121 W/LPower supply for ECM
(Buck-up)[Ignition switch “OFF”]BATTERY VOLTAGE
(11 - 14V) TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
Diagnostic test mode Function
Work supportThis mode enables a technician to adjust some devices faster and more accurately by following the
indications on the CONSULT-II unit.
Self-diagnostic resultsSelf-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data
can be read and erased quickly.
*1
Data monitor Input/Output data in the ECM can be read.
Data monitor (SPEC)Input/Output of the specification for Basic fuel schedule, AFM, A/F feedback control value and the
other data monitor items can be read.
Active testDiagnostic Test Mode in which CONSULT-II drives some actuators apart from the ECMs and also
shifts some parameters in a specified range.
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-466
[QG (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
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-468
.
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
ItemDIAGNOSTIC TEST MODE
WORK
SUPPORTSELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TORDATA
MONI-
TOR
(SPEC)ACTIVE
TEST DTC*1FREEZE
FRAME
DATA
*2
ENGINE CONTROL COMPONENT PARTS
INPUT
Crankshaft position sensor (POS)××××
Camshaft position sensor (PHASE)×××
Mass air flow sensor×××
Engine coolant temperature sensor×××××
Heated oxygen sensor 1×××
Heated oxygen sensor 2×××
Vehicle speed signal×××
Accelerator pedal position sensor×××
Throttle position sensor×××
Intake air temperature sensor××
Knock sensor×
Refrigerant pressure sensor××
Closed throttle position switch (accelerator
pedal position sensor signal)××
Air conditioner switch××
Park/neutral position (PNP) switch××
Stop lamp switch×××
Power steering pressure sensor××
Battery voltage××
Electrical load signal××
ENGINE CONTROL COMPONENT PARTS
OUTPUT
Injectors×× ×
Power transistor (Ignition timing)×× ×
Throttle control motor relay×××
Throttle control motor×
EVAP canister purge volume control sole-
noid valve×× ×
Air conditioner relay××
Fuel pump relay××××
Cooling fan relay××××
Heated oxygen sensor 1 heater××
Heated oxygen sensor 2 heater××
Intake valve timing control solenoid valve×× ×
Calculated load value×××

TROUBLE DIAGNOSIS
EC-467
[QG (WITHOUT EURO-OBD)]
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2. Connect “CONSULT-II” and ″CONSULT-II CONVERTER″ to
data link connector, which is located under the driver’s side dash
panel.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL)”.
5. Touch “ENGINE”.
If ″ENGINE″ is not indicated, go to GI-38.
6. Perform each diagnostic test mode according to each service
procedure.
For further information, see the CONSULT-II Operation Manual.
WORK SUPPORT MODE
Work Item
MBIB0251E
MBIB0233E
SEF995X
SEF824Y
WORK ITEM CONDITION USAGE
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
IDLE AIR VOL LEARN
●THE IDLE AIR VOLUME THAT KEEPS THE ENGINE
WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM.When learning the idle air volume

EC-468
[QG (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
*: This function is not necessary in the usual service procedure.
SELF-DIAG RESULTS MODE
Self Diagnostic Item
Regarding items of “DTC and 1st trip DTC”, refer to EC-406, "INDEX FOR DTC" .)
Freeze Frame Data and 1st Trip Freeze Frame Data
*1: The items are the same as those of 1st trip freeze frame data. SELF-LEARNING CONT
●THE COEFFICIENT OF SELF-LEARNING CONTROL
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.When clearing the coefficient of
self-learning control value
TARGET IDLE RPM ADJ
*●IDLE CONDITION When setting target idle speed
TARGET IGN TIM ADJ
*●IDLE CONDITION When adjusting target ignition tim-
ing
After adjustment, confirm target
ignition timing with a timing light. WORK ITEM CONDITION USAGE
Freeze frame data
item*1Description
DIAG TROUBLE
CODE
[PXXXX]
●The engine control component part/control system has a trouble code, it is displayed as “PXXXX”. (Refer
to EC-406, "
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 enrichment)
“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
CAL/LD VALUE [%]
●The calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [°C]
or [°F]
●The engine coolant temperature at the moment a malfunction is detected is displayed.
L-FUEL TRIM-B1 [%]
●“Long-term fuel trim” 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.
S-FUEL TRIM-B1 [%]
●“Short-term fuel trim” 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.
ENGINE SPEED
[rpm]
●The engine speed at the moment a malfunction is detected is displayed.
VHCL SPEED [km/h]
or [mph]
●The vehicle speed 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.
INT/A TEMP SE [°C]
or [°F]
●The intake air temperature at the moment a malfunction is detected is displayed.

TROUBLE DIAGNOSIS
EC-469
[QG (WITHOUT EURO-OBD)]
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DATA MONITOR MODE
Monitored Item
×: Applicable
Monitored item
[Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSCAN
DIAG
SUP-
PORT
MNTRDescription Remarks
ENG SPEED [rpm]××
●Indicates the engine speed computed
from the signals of the crankshaft posi-
tion sensor (POS) and camshaft posi-
tion sensor (PHASE).●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]××
●The signal voltage of the mass air flow
sensor is displayed.●When the engine is stopped, a
certain value is indicated.
B/FUEL SCHDL
[msec]×
●“Base fuel schedule” indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board cor-
rection.
A/F ALPHA-B1 [%]×
●The mean value of the air-fuel ratio
feedback correction factor per cycle is
indicated.
●When the engine is stopped, a
certain value is indicated.
●This data also includes the data
for the air-fuel ratio learning con-
trol.
COOLAN TEMP/S
[°C] or [°F]××
●The engine coolant temperature (deter-
mined by the signal voltage of the
engine coolant temperature sensor) is
displayed.
●When the engine coolant tempera-
ture sensor is open or short-cir-
cuit, ECM enters fail-safe mode.
The engine coolant temperature
determined by the ECM is dis-
played.
HO2S1 (B1) [V]××
●The signal voltage of the heated oxygen
sensor 1 is displayed.
HO2S2 (B1) [V]×
●The signal voltage of the heated oxygen
sensor 2 is displayed.
HO2S1 MNTR (B1)
[RICH/LEAN]××
●Display of heated oxygen sensor 1 sig-
nal during air-fuel ratio feedback control:
RICH ... means the mixture became
“rich”, and control is being affected
toward a leaner mixture.
LEAN ... means the mixture became
“lean”, and control is being affected
toward a rich mixture.●After turning ON the ignition
switch, “RICH” is displayed until
air-fuel mixture ratio feedback
control begins.
●When the air-fuel ratio feedback is
clamped, the value just before the
clamping is displayed continu-
ously.
HO2S2 MNTR (B1)
[RICH/LEAN]×
●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
certain value is indicated.
VHCL SPEED SE
[km/h] or [mph]××
●The vehicle speed computed from the
vehicle speed signal is displayed.
BATTERY VOLT
[V]××
●The power supply voltage of ECM is dis-
played.
ACCEL SEN 1 [V]××
●The accelerator pedal position sensor
signal voltage is displayed.
ACCEL SEN 2 [V]×

EC-470
[QG (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
THRTL SEN 1 [V]××●The throttle position sensor signal volt-
age is displayed.
THRTL SEN 2 [V]×
INT/A TEMP SE
[°C] or [°F]××
●The intake air temperature (determined
by the signal voltage of the intake air
temperature sensor) is indicated.
START SIGNAL
[ON/OFF]××
●Indicates [ON/OFF] condition of the
starter signal computed from the signals
of the crankshaft position sensor (POS),
camshaft position sensor (PHASE) and
battery voltage.
●After starting the engine, [OFF] is
displayed regardless of the starter
signal.
CLSD THL POS
[ON/OFF]××
●Indicates idle position [ON/OFF] com-
puted by ECM according to the acceler-
ator pedal position sensor signal.
AIR COND SIG
[ON/OFF]××
●Indicates [ON/OFF] condition of the air
conditioner switch as determined by the
air conditioner signal.
P/N POSI SW
[ON/OFF]××
●Indicates [ON/OFF] condition from the
park/neutral position (PNP) switch sig-
nal.
PW/ST SIGNAL
[ON/OFF]××
●[ON/OFF] condition of the power steer-
ing oil pressure switch as determined by
the power steering oil pressure signal is
indicated.
LOAD SIGNAL
[ON/OFF]××
●Indicates [ON/OFF] condition from the
electrical load signal.
ON ... Rear window defogger switch is
ON and/or lighting switch is in 2nd posi-
tion.
OFF ... Both rear window defogger
switch and lighting switch are OFF.
IGNITION SW
[ON/OFF]×
●Indicates [ON/OFF] condition from igni-
tion switch.
HEATER FAN SW
[ON/OFF]×
●Indicates [ON/OFF] condition from the
heater fan switch signal.
BRAKE SW
[ON/OFF]×
●Indicates [ON/OFF] condition from the
stop lamp switch signal.
INJ PULSE-B1
[msec]×
●Indicates the actual fuel injection pulse
width compensated by ECM according
to the input signals.●When the engine is stopped, a
certain computed value is indi-
cated.
IGN TIMING
[BTDC]×
●Indicates the ignition timing computed
by ECM according to the input signals.●When the engine is stopped, a
certain value is indicated.
CAL/LD VALUE [%]
●“Calculated load value” indicates the
value of the current airflow divided by
peak airflow.
MASS AIRFLOW
[g·m/s]
●Indicates the mass airflow computed by
ECM according to the signal voltage of
the mass air flow sensor. Monitored item
[Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSCAN
DIAG
SUP-
PORT
MNTRDescription Remarks