2003 NISSAN X-TRAIL Electronic Repair Manual

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Page 1545 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-431
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EC65 RSensors power sup-
ply[Ignition switch “ON”]Approximately 5V
66 W/LPower supply for
ECM (Buck-up)[Ignition switch “

Page 1546 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-432
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TROUBLE DIAGNOSIS
75 R/LAccelerator pedal
position sensor 1[Ignition switch "ON"]lAccelerator pedal fully released0.41 - 0.71V
[Ignition switch "ON"]
lAccelerator pedal

Page 1547 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-433
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EC
101
102
103
104R/B
Y/B
G/B
L/BInjector No. 1
Injector No. 2
Injector No. 3
Injector No. 4[Engineisrunning]
lWarm-up condition

Page 1548 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-434
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TROUBLE DIAGNOSIS
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
CONSULT-II FunctionEBS00BN3
FUNCTION
*1 The following emissi

Page 1549 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-435
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EC
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
X: Applicable
*1: This item includes 1st trip DTCs.
*2: This mode

Page 1550 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-436
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TROUBLE DIAGNOSIS
2. Connect “CONSULT-II” to data link connector, which is located
under LH dash panel near the fuse box cover.
3. Turn ignition switch ON.
4. Touch

Page 1551 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-437
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EC
*: This function is not necessary in the usual service procedure.
SELF-DIAG RESULTS MODE
Self Diagnostic Item
Regarding items

TROUBLE DIAGNOSIS
EC-437
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EC
*: 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 toEC-379, "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
lTHE COEFFICIENT OF SELF-LEARNING CONTROL
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.When releasing fuel pressure
from fuel line
TARGET IDLE RPM ADJ*
lIDLE CONDITION When setting target idle speed
TARGET IGNITION TIMING ADJ*
lIDLE 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]
lThe engine control component part/control system has a trouble code, it is displayed as “PXXXX”. (Refer
toEC-379, "
INDEX FOR DTC".)
FUEL SYS-B1
l“Fuel injection system status” at the moment a malfunction is detected is displayed.
lOne 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 [%]
lThe calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [°C]
or [°F]
lThe engine coolant temperature at the moment a malfunction is detected is displayed.
S-FUEL TRIM-B1 [%]
l“Short-term fuel trim” at the moment a malfunction is detected is displayed.
lThe short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel
schedule.
L-FUEL TRIM-B1 [%]
l“Long-term fuel trim” at the moment a malfunction is detected is displayed.
lThe long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule
than short-term fuel trim.
ENGINE SPEED
[rpm]
lThe engine speed at the moment a malfunction is detected is displayed.
VHCL SPEED [km/h]
or [mph]
lThe vehicle speed at the moment a malfunction is detected is displayed.
B/FUEL SCHDL
[msec]
lThe base fuel schedule at the moment a malfunction is detected is displayed.
INT/ATEMPSE[°C]
or [°F]
lThe intake air temperature at the moment a malfunction is detected is displayed.

Page 1552 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-438
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TROUBLE DIAGNOSIS
DATA MONITOR MODE
Monitored Item
´: Applicable
Monitored item
[Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSCAN
DIAG
SUP-
PORT
MNTRDescription Remarks
ENG SP

EC-438
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TROUBLE DIAGNOSIS
DATA MONITOR MODE
Monitored Item
´: Applicable
Monitored item
[Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSCAN
DIAG
SUP-
PORT
MNTRDescription Remarks
ENG SPEED [rpm]´´
lIndicates the engine speed computed
from the signal of the crankshaft position
sensor (POS).
lAccuracy becomes poor if engine
speed drops below the idle rpm.
lIf the signal is interrupted while the
engine is running, an abnormal
value may be indicated.
MAS A/F SE-B1 [V]´´
lThe signal voltage of the mass air flow
sensor is displayed.lWhen the engine is stopped, a
certain value is indicated.
COOLAN TEMP/S
[°C] or [°F]´´
lThe engine coolant temperature (deter-
mined by the signal voltage of the
engine coolant temperature sensor) is
displayed.
lWhen the engine coolant tempera-
ture sensor is open or short-cir-
cuited, ECM enters fail-safe mode.
The engine coolant temperature
determined by the ECM is dis-
played.
HO2S1 (B1) [V]´´
lThe signal voltage of heated oxygen
sensor 1 is displayed.
HO2S2 (B1) [V]´´
lThe signal voltage of heated oxygen
sensor 2 is displayed.
HO2S1 MNTR (B1)
[RICH/LEAN]´´
lDisplay 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.lAfter turning ON the ignition
switch, “RICH” is displayed until
air-fuel mixture ratio feedback
control begins.
lWhen the air-fuel ratio feedback is
clamped, the value just before the
clamping is displayed continu-
ously.
HO2S2 MNTR (B1)
[RICH/LEAN]´
lDisplay 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.
lWhen the engine is stopped, a
certain value is indicated.
VHCL SPEED SE
[km/h] or [mph]´´
lThe vehicle speed computed from the
vehicle speed signal is displayed.
BATTERY VOLT
[V]´´
lThe power supply voltage of ECM is dis-
played.
ACCEL SEN 1 [V]´´
lThe accelerator pedal position sensor
signal voltage is displayed.
ACCEL SEN 2 [V]´
THRTL SEN 1 [V]´´
lThe throttle position sensor signal volt-
age is displayed.
THRTL SEN 2 [V]´
INT/ATEMPSE
[°C] or [°F]´´
lThe intake air temperature (determined
by the signal voltage of the intake air
temperature sensor) is indicated.
START SIGNAL
[ON/OFF]´´
lIndicates [ON/OFF] condition from the
starter signal.lAfter starting the engine, [OFF] is
displayed regardless of the starter
signal.

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