sensor NISSAN X-TRAIL 2003 Electronic Repair Manual

EC-438
[QR (WITHOUT EURO-OBD)]
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.

TROUBLE DIAGNOSIS
EC-439
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
CLSD THL POS
[ON/OFF]´´lIndicates idle position [ON/OFF] com-
puted by ECM according to the acceler-
ator pedal position sensor signal.
AIR COND SIG
[ON/OFF]´´
lIndicates [ON/OFF] condition of the air
conditioner switch as determined by the
air conditioner signal.
P/N POSI SW
[ON/OFF]´´
lIndicates [ON/OFF] condition from the
park/neutral position (PNP) switch sig-
nal.
PW/ST SIGNAL
[ON/OFF]´´
l[ON/OFF] condition of the power steer-
ing system (determined by the signal
voltage of the power steering pressure
sensor signal) is indicated.
LOAD SIGNAL
[ON/OFF]´´
lIndicates [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]´´
lIndicates [ON/OFF] condition from igni-
tion switch.
HEATER FAN SW
[ON/OFF]´
lIndicates [ON/OFF] condition from the
heater fan switch signal.
BRAKE SW
[ON/OFF]´
lIndicates [ON/OFF] condition from the
stop lamp switch signal.
INJ PULSE-B1
[msec]´
lIndicates the actual fuel injection pulse
width compensated by ECM according
to the input signals.lWhen the engine is stopped, a
certain computed value is indi-
cated.
B/FUEL SCHDL
[msec]´
l“Base fuel schedule” indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board cor-
rection.
IGN TIMING
[BTDC]´
lIndicates the ignition timing computed
by ECM according to the input signals.lWhen the engine is stopped, a
certain value is indicated.
A/F ALPHA-B1 [%]´
lThe mean value of the air-fuel ratio
feedback correction factor per cycle is
indicated.
lWhen the engine is stopped, a
certain value is indicated.
lThis data also includes the data
for the air-fuel ratio learning con-
trol.
CAL/LD VALUE [%]
l“Calculated load value” indicates the
value of the current airflow divided by
peak airflow.
MASS AIRFLOW
[g·m/s]
lIndicates 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

EC-440
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
PURG VOL C/V
[%]
lIndicates the EVAP canister purge vol-
ume control solenoid valve control value
computed by the ECM according to the
input signals.
lThe opening becomes larger as the
value increases.
INT/V TIM (B1)
[°CA]
lIndicates [°CA] of intake camshaft
advanced angle.
INT/V SOL (B1) [%]
lThe control condition of the intake valve
timing control solenoid valve (deter-
mined by ECM according to the input
signals) is indicated.
ON ... intake valve timing control is oper-
ating.
OFF ... Intake valve timing control is not
operating.
AIRCONDRLY
[ON/OFF]´
lThe air conditioner relay control condi-
tion (determined by ECM according to
the input signals) is indicated.
FUEL PUMP RLY
[ON/OFF]´
lIndicates the fuel pump relay control
condition determined by ECM according
to the input signals.
THRTL RELAY
[ON/OFF]
lIndicates the throttle control motor relay
control condition determined by the
ECM according to the input signals.
COOLING FAN
[HI/LOW/OFF]
lIndicates the condition of the cooling fan
(determined by ECM according to the
input signals).
HI ... High speed operation
LOW ... Low speed operation
OFF ... Stop
HO2S1 HTR (B1)
[ON/OFF]
lIndicates [ON/OFF] condition of heated
oxygen sensor 1 heater determined by
ECM according to the input signals.
HO2S2 HTR (B1)
[ON/OFF]
lIndicates [ON/OFF] condition of heated
oxygen sensor 2 heater determined by
ECM according to the input signals.
IDL A/V LEARN
[YET/CMPLT/
INCMP]
lDisplay the condition of idle air volume
learning
YET ... Idle air volume learning has not
been performed yet.
CMPLT ... Idle air volume learning has
already been performed successfully.
INCMP ... Idle air volume learning has
not been performed successfully.
TRVL AFTER MIL
[km] or [mile]
lDistance traveled while MI is activated.
AC PRESS SEN
[V]
lThe signal voltage from the refrigerant
pressure sensor is displayed. Monitored item
[Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSCAN
DIAG
SUP-
PORT
MNTRDescription Remarks

TROUBLE DIAGNOSIS
EC-441
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
NOTE:
lAny monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
DATA MONITOR (SPEC) MODE
Monitored Item
NOTE:
lAny monitored item that does not match the vehicle being diagnosed is deleted from the display automatically. Voltage [V]
lVoltage, frequency, duty cycle or pulse
width measured by the probe.
lOnly “#” is displayed if item is
unable to be measured.
lFigures with “#”s are temporary
ones. They are the same figures
as an actual piece of data which
was just previously measured. Frequency
[msec], [Hz] or [%]
DUTY-HI
DUTY-LOW
PLS WIDTH-HI
PLS WIDTH-LOW
CAN COMM
[OK/NG]´
lIndicates the communication condition
of CAN communication line.lThese items are not displayed in
"SELECTION FROM MENU"
mode. CANCIRC1
[OK/UNKWN]´
CANCIRC2
[OK/UNKWN]´
CANCIRC3
[OK/UNKWN]´
CANCIRC4
[OK/UNKWN]´
CANCIRC5
[OK/UNKWN]´ Monitored item
[Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSCAN
DIAG
SUP-
PORT
MNTRDescription Remarks
Monitored item [Unit]ECM
input
signalsMain
signalsDescription Remarks
ENG SPEED [rpm]´
lIndicates the engine speed computed
from the signal of the crankshaft position
sensor (POS).
MAS A/F SE-B1 [V]´´
lThe signal voltage of the mass air flow
sensor specification is displayed.lWhen engine is running specification
range is indicated.
B/FUEL SCHDL
[msec]
l“Base fuel schedule” indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board cor-
rection.
lWhen engine is running specification
range is indicated.
A/F ALPHA-B1 [%]´
lThe mean value of the air-fuel ratio feed-
back correction factor per cycle is indi-
cated.lWhen engine is running specification
range is indicated.
lThis data also includes the data for the
air-fuel ratio learning control.

EC-442
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
ACTIVE TEST MODE
Test Item
REAL TIME DIAGNOSIS IN DATA MONITOR MODE (RECORDING VEHICLE DATA)
Description
CONSULT-II has two kinds of triggers and they can be selected by
touching “SETTING” in “DATA MONITOR” mode.
1. “AUTO TRIG” (Automatic trigger):
–The malfunction will be identified on the CONSULT-II screen in
real time.
In other words, DTC/1st trip DTC and malfunction item will be
displayed if the malfunction is detected by ECM.
At the moment a malfunction is detected by ECM, “MONITOR”
in “DATA MONITOR” screen is changed to “Recording Data ...
xx%” as shown at right, and the data after the malfunction detec-
tion is recorded. Then when the percentage reached 100%,
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
FUEL INJEC-
TION
lEngine: Return to the original
trouble condition
lChange the amount of fuel injec-
tion using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
lHarness and connectors
lFuel injectors
lHeated oxygen sensor 1
IGNITION TIM-
ING
lEngine: Return to the original
trouble condition
lTiming light: Set
lRetard the ignition timing using
CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
lPerform “Idle Air Volume Learn-
ing”.
POWER BAL-
ANCE
lEngine: After warming up, idle
the engine.
lA/C switch “OFF”
lShift lever “N”
lCut off each injector signal one at
a time using CONSULT-II.Engine runs rough or dies.
lHarness and connectors
lCompression
lFuel injectors
lPower transistor
lSpark plugs
lIgnition coils
COOLING FAN
lIgnition switch: ON
lTurn the cooling fan “ON” and
“OFF” with CONSULT-II.Cooling fan moves and stops.
lHarness and connectors
lCooling fan relay
lCooling fan motor
ENG COOLANT
TEMP
lEngine: Return to the original
trouble condition
lChange the engine coolant tem-
perature using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
lHarness and connectors
lEngine coolant temperature sen-
sor
lFuel injectors
FUEL PUMP
RELAY
lIgnition switch: ON (Engine
stopped)
lTurn the fuel pump relay “ON”
and “OFF” using CONSULT-II
and listen to operating sound.Fuel pump relay makes the operat-
ing sound.lHarness and connectors
lFuel pump relay
PURG VOL
CONT/V
lEngine: After warming up, run
engine at 1,500 rpm.
lChange the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-II.Engine speed changes according to
the opening percent.lHarness and connectors
lSolenoid valve
V/T ASSIGN
ANGLE
lEngine: Return to the original
trouble condition
lChange intake valve timing using
CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.
lHarness and connectors
lIntake valve timing control sole-
noid valve
SEF706XSEF707X

EC-444
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
i.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show the specification data in
spite of the ignition timing not being adjusted to the specification data. This IGN TIMING monitors the data calculated by the ECM
according to the signals input from the camshaft position sensor and other ignition timing related sensors.
lIf the real-time diagnosis results are NG and the on board diagnostic system results are OK when diagnosing the mass air flow sen-
sor, first check to see if the fuel pump control circuit is normal.
MONITOR ITEM CONDITION SPECIFICATION
ENG SPEED
lTachometer: Connect
lRun engine and compare tachometer indication with the CONSULT-II
value.Almost the same speed as the
CONSULT-II value.
MAS A/F SE-B1
lEngine: After warming up
lAir conditioner switch: OFF
lShift lever: N
lNo-loadIdle Approx. 1.0 - 1.5V
2,500 rpm Approx. 1.6 - 2.0V
B/FUEL SCHDL
lEngine: After warming up
lShift lever: N
lAir conditioner switch: OFF
lNo-loadIdle 2.5 - 3.5 msec
2,000 rpm 2.5 - 3.5 msec
A/F ALPHA-B1
lEngine: After warming upMaintaining engine speed at 2,000
rpm54% - 155%
COOLAN TEMP/S
lEngine: After warming up More than 70°C(158°F)
HO2S1 (B1)
lEngine: After warming upMaintaining engine speed at 2,000
rpm0 - 0.3V¨Approx. 0.6 - 1.0V
HO2S2 (B1)
lEngine: After warming upRevving engine from idle to 3,000
rpm quickly.0 - 0.3V¨Approx. 0.6 - 1.0V
HO2S1 MNTR (B1)
lEngine: After warming upMaintaining engine speed at 2,000
rpmLEAN¨RICH
Changes more than 5 times dur-
ing 10 seconds.
HO2S2 MNTR (B1)
lEngine: After warming upRevving engine from idle to 3,000
rpm quickly.LEAN¨RICH
VEH SPEED SE
lTurn drive wheels and compare speedometer indication with the CON-
SULT-II value.Almost the same speed as the
CONSULT-II value
BATTERY VOLT
lIgnition switch: ON (Engine stopped) 11 - 14V
ACCEL SEN1
lIgnition switch: ON
(engine stopped)Accelerator pedal: Fully released 0.41 - 0.71V
Accelerator pedal: Fully depressed More than 3.9V
ACCEL SEN2
lIgnition switch: ON
(engine stopped)Accelerator pedal: Fully released 0.15 - 0.97V
Accelerator pedal: Fully depressed More than 3.8V
THRTL SEN1
THRTL SEN2
lIgnition switch: ON
(Engine stopped)Accelerator pedal: Fully released More than 0.36V
lShift lever:
D (A/T model)
1st (M/T model)Accelerator pedal: Fully depressed Less than 4.75V
START SIGNAL
lIgnition switch: ON®START®ON OFF®ON®OFF
CLSD THL POS
lIgnition switch: ONAccelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
AIR COND SIG
lEngine: After warming up, idle
the engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.)ON
P/N POSI SW
lIgnition switch: ONShift lever:
P or N (A/T model)
Neutral (M/T model)ON
Shift lever: Except above OFF

EC-446
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
*: These items are not applied for M/T models without ESP.
Major Sensor Reference Graph in Data Monitor ModeEBS00BN5
The following are the major sensor reference graphs in “DATA MONITOR” mode.
CLSD THL POS, ACCEL SEN 1, THRTL SEN 1
Below is the data for “CLSD THL POS”, “ACCEL SEN 1” and “THRTL SEN 1” when depressing the accelera-
tor pedal with the ignition switch “ON” and with selector lever in "D" position (A/T models) or with shift lever in
"1st" position (M/T models).
The signal of “ACCEL SEN 1” and “THRTL SEN 1” should rise gradually without any intermittent drop or rise
after “CLSD THL POS” is changed from “ON” to “OFF”.
ENG SPEED, MAS A/F SE-B1, THRTL SEN 1, HO2S2 (B1), HO2S1 (B1), INJ PULSE-B1
Below is the data for “ENG SPEED”, “MAS A/F SE-B1”, “THRTL SEN 1”, “HO2S2 (B1)”, “HO2S1 (B1)” and
“INJ PULSE-B1” when revving engine quickly up to 4,800 rpm under no load after warming up engine suffi-
ciently.
COOLING FAN
lEngine: After warming up, idle
the engine
lAir conditioner switch: OFFEngine coolant temperature is 94°C
(201°F) or lessOFF
Engine coolant temperature is
between 95°C (203°F) and 104°C
(219°F)LOW
Engine coolant temperature is 105°C
(221°F) or moreHIGH
HO2S1 HTR (B1)
lEngine: After warming up
lEngine speed: Below 3,600 rpmON
lEngine speed: Above 3,600 rpm OFF
HO2S2 HTR (B1)
lEngine speed: Below 3,800 rpm [After driving for 2 minutes at a speed of
70 km/h (43 MPH) or more]ON
lEngine speed: Above 3,800 rpm OFF
TRVL AFTER MIL
lIgnition switch: ONVehicle has traveled after MI has
turned ON.0-65,535km
(0 - 40,723 mile)
AC PRESS SEN
lIgnition switch: ON (Engine stopped) Approx. 0V
lEngine: Idle
lAir conditioner switch: OFF1.0 - 4.0V
CAN COMM*
lIgnition switch: ONOK
CANCIRC1*OK
CANCIRC2*OK (A/T models)
UNKWN (M/T models with ESP)
CANCIRC3*UNKWN (A/T models)
OK (M/T models with ESP)
CANCIRC4*UNKWN
CANCIRC5*UNKWN MONITOR ITEM CONDITION SPECIFICATION
PBIB0198E

TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-449
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
TROUBLE DIAGNOSIS - SPECIFICATION VALUEPFP:00031
DescriptionEBS00BFM
The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”
mode of CONSULT-II during normal operation of the Engine Control System. When the value in “DATA MONI-
TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in
“DATA MONITOR (SPEC)” 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:
lB/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection)
lA/F ALPHA-B1 (The mean value of air-fuel ratio feedback correction factor per cycle)
lMAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Testing ConditionEBS00BFN
lVehicle driven distance: More than 5,000 km (3,017 miles)
lBarometric pressure: 98.3 - 104.3 kPa (0.983 - 1.043 bar, 1.003 - 1.064 kg/cm2, 14.25 - 15.12 psi)
lAtmospheric temperature: 20 - 30°C(68-86°F)
lEngine coolant temperature: 75 - 95°C (167 - 203°F)
lTransmission: Warmed-up*1
lElectrical load: Not applied*2
lEngine speed: Idle
*1: For A/T models with CONSULT-II, after the engine is warmed up to normal operating temperature, drive
vehicle until “FLUID TEMP SE” (A/T fluid temperature sensor signal) indicates more than 60°C (140°F).
For A/T models without CONSUT-II and M/T models, after the engine is warmed up to normal operating tem-
perature, drive vehicle for 5 minutes.
*2: Rear window defogger switch, air conditioner switch, lighting switch are “OFF”. Steering wheel is straight
ahead.
Inspection ProcedureEBS00BFO
NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.
1. PerformEC-412, "
Basic Inspection".
2. Confirm that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1” and “MAS A/F SE-
B1” in “DATA MONITOR (SPEC)” mode with CONSULT-II.
4. Make sure that monitor items are within the SP value.
5. If NG, go toEC-450, "
Diagnostic Procedure".
SEF601Z

DTC P0102, P0103 MAF SENSOR
EC-463
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
DTC P0102, P0103 MAF SENSORPFP:22680
Component DescriptionEBS00BG1
The mass air flow sensor is placed in the stream of intake air. It mea-
sures the intake flow rate by measuring a part of the entire intake
flow. It consists of a hot film that is supplied with electric current from
the ECM. The temperature of the hot film is controlled by the ECM a
certain amount. The heat generated by the hot film is reduced as the
intake air flows around it. The more air, the greater the heat loss.
Therefore, the ECM must supply more electric current to maintain
the temperature of the hot film as air flow increases. The ECM
detects the air flow by means of this current change.
CONSULT-II Reference Value in Data Monitor ModeEBS00BG2
Specification data are reference values.
ECM Terminals and Reference ValueEBS00BG3
Specification data are reference values and are measured between each terminal and body 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.
SEC266C
MONITOR ITEM CONDITION SPECIFICATION
MAS A/F SE-B1
lEngine: After warming up
lAir conditioner switch: OFF
lShiftlever:N
lNo-loadIdle Approx. 1.0 - 1.5V
2,500 rpm Approx. 1.6 - 2.0V
CAL/LD VALUE
lEngine: After warming up
lShiftlever:N
lAir conditioner switch: OFF
lNo-loadIdle 10% - 35%
2,500 rpm 10% - 35%
MASS AIRFLOW
lEngine: After warming up
lShiftlever:N
lAir conditioner switch: OFF
lNo-loadIdle 1.0 - 4.0 g·m/s
2,500 rpm 4.0 - 10.0 g·m/s
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
72 OR Mass air flow sensor[Engineisrunning]
lWarm-up condition
lIdle speed1.1 - 1.5V
[Engineisrunning]
lWarm-up condition
lEngine speed is 2,500 rpm.1.6 - 2.0V
80 B/PMass air flow sensor
ground[Engineisrunning]
lWarm-up condition
lIdle speedApproximately 0V

EC-464
[QR (WITHOUT EURO-OBD)]
DTC P0102, P0103 MAF SENSOR
On Board Diagnosis Logic
EBS00BG4
FAIL -S AFE M OD E
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
DTC Confirmation ProcedureEBS00BG5
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
PROCEDURE FOR DTC P0102
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and wait 5 seconds at most.
4. If 1st trip DTC is detected, go toEC-467, "
Diagnostic Procedure"
.
Without CONSULT-II
1. Start engine and wait 5 seconds at most.
2. Turn ignition switch "OFF", wait at least 10 seconds and then turn "ON".
3. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
4. If 1st trip DTC is detected, go toEC-467, "
Diagnostic Procedure".
PROCEDURE FOR DTC P0103
With CONSULT-II
1. Turn ignition switch “ON”.
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P0102
0102Mass air flow sensor
circuit low inputAn excessively low voltage from the sensor is
sent to ECM.
lHarness or connectors
(The sensor circuit is open or shorted.)
lIntake air leaks
lMass air flow sensor
P0103
0103Mass air flow sensor
circuit high inputAn excessively high voltage from the sensor is
sent to ECM.
lHarness or connectors
(The sensor circuit is open or shorted.)
lMass air flow sensor
Detected items Engine operating condition in fail-safe mode
Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
SEF058Y