heater NISSAN X-TRAIL 2003 Electronic Manual PDF

EC-430
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TROUBLE DIAGNOSIS
42 B/R Ignition switch[Ignition switch “OFF”]0V
[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
43 G/OR PNP switch[Ignition switch “ON”]
lGear position is “P” or “N”.Approximately 0V
[Ignition switch “ON”]
lExcept the above gear positionA/T model
BATTERY VOLTAGE
(11 - 14V)
M/T model
Approximately 5V
50 LG Data link connector[Ignition switch “ON”]
lCONSULT-II or GST is disconnected.Approximately 5V
52 R/WElectrical load signal
(Rear window defog-
ger signal)[Ignition switch "ON"]
lRear window defogger switch is "ON"BATTERY VOLTAGE
(11 - 14V)
[Ignition switch "ON"]
lRear window defogger switch is "OFF"Approximately 0V
53 R/YElectrical load signal
(Headlamp signal)[Ignition switch "ON"]
lLighting switch is "2ND" positionBATTERY VOLTAGE
(11 - 14V)
[Ignition switch "ON"]
lLighting switch is "OFF"Approximately 0V
55 LG/BHeater fan switch sig-
nal[Ignition switch "ON"]
lHeater fan control switch is "ON"Approximately 0V
[Ignition switch "ON"]
lHeater fan control switch is "OFF"Approximately 5V
58 B Sensors' ground[Engine is running]
lWarm-up condition
lIdle speedApproximately 0V
59
60
106
108B
B
B/Y
B/YECM ground[Engine is running]
lIdle speedEngine ground
63 L/WCamshaft position
sensor (PHASE)[Engine is running]
lWarm-up condition
lIdle speed1.0 - 4.0V
[Engine is running]
lEngine speed is 2,000 rpm.1.0 - 4.0V
64 OR/LAccelerator pedal
position sensor 2
power supply[Ignition switch “ON”]Approximately 2.5V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0525E
PBIB0526E

TROUBLE DIAGNOSIS
EC-435
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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 toEC-402
.
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´´
Wheel sensor (Vehicle speed signal)´´´´
Accelerator pedal position sensor´´´
Throttlepositionsensor´´´
Intake air temperature sensor´´
Knock sensor´
Refrigerant pressure sensor´´
Ignition switch (start signal)´´
Closed throttle position switch (accelera-
tor pedal position sensor signal)´´
Air conditioner switch´´
Park/neutral position (PNP) switch´´
Stop lamp switch´´´
Power steering pressure sensor´´´
Battery voltage´´
Load signal´´
ENGINE CONTROL COMPONENT PARTS
OUTPUT
Injectors´´ ´
Power transistor (Ignition timing)´´ ´
Throttle control motor relay´´´
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-439
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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
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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-445
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PW/ST SIGNALlEngine: After warming up, idle
the engineSteering wheel is in neutral position.
(Forward direction)OFF
Steering wheel is turned. ON
LOAD SIGNAL
lIgnition switch: ONRear window defogger switch is ON
and/or lighting switch is in 2nd.ON
Rear window defogger switch is OFF
and lighting switch is OFF.OFF
IGNITION SW
lIgnition switch: ON®OFF®ON ON®OFF®ON
HEATER FAN SW
lEngine: After warming up, idle
the engineHeater fan is operating. ON
Heater fan is not operating OFF
BRAKE SW
lIgnition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
INJ PULSE-B1
lEngine: After warming up
lShiftlever:N
lAir conditioner switch: OFF
lNo-loadIdle 2.0-3.0msec
2,000 rpm 1.9 - 2.9 msec
IGN TIMING
lEngine: After warming up
lShiftlever:N
lAir conditioner switch: OFF
lNo-loadIdleMT: 12°-16°BTDC
AT: 1 4°-18°BTDC
2,000 rpm 25°-45°BTDC
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
PURG VOL C/V
lEngine: After warming up
lShiftlever:N
lAir conditioner switch: OFF
lNo-loadIdle 0%
2,000 rpm 20 - 30%
INT/V TIM (B1)
lEngine: After warming up
lShiftlever:N
lAir conditioner switch: OFF
lNo-loadIdle-5°-5°CA
When revving engine up to 2,000 rpm
quicklyApprox. 0°-20°CA
INT/V SOL (B1)
lEngine: After warming up
lShiftlever:N
lAir conditioner switch: OFF
lNo-loadIdle 0% - 2%
When revving engine up to 2,000 rpm
quicklyApprox. 0% - 50%
AIR COND RLY
lEngine: After warming up, idle
the engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates)ON
FUEL PUMP RLY
lFor 1 seconds after turning ignition switch ON
lEngine running or crankingON
lExcept above conditions OFF
THRTL RELAY
lIgnition switch: ON ON MONITOR ITEM CONDITION SPECIFICATION

EC-568
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HO2S1 HEATER
HO2S1 HEATER
PFP:22690
DescriptionEBS00BJQ
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty control of the heated oxygen sensor 1 heater corresponding to the engine
speed and engine coolant temperature. The duty percent varies with engine coolant temperature when engine
is started.
OPERATION
CONSULT-II Reference Value in Data Monitor ModeEBS00BJR
Specification data are reference values.
ECM Terminals and Reference ValueEBS00BJS
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)Sensor Input Signal to ECM ECM function Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)Engine speed
Heated oxygen sensor 1
heater controlHeated oxygen sensor 1 heater
Engine coolant temperature sensorEngine coolant tempera-
ture
Engine speed rpm Heated oxygen sensor 1 heater
Above 3,600 OFF
Below 3,600 ON
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 HTR (B1)
lEngine: After warming up
lEngine speed: Below 3,600 rpmON
lEngine speed: Above 3,600 rpm OFF
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
2P/LHeated oxygen sen-
sor 1 heater[Engine is running]
lWarm-up condition
lEngine speed is below 3,600 rpm.Approximately 7.0V
[Engine is running]
lEngine speed is above 3,600 rpm.BATTERY VOLTAGE
(11 - 14V)
PBIB0519E

HO2S1 HEATER
EC-569
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Wiring DiagramEBS00BJT
TBWA0075E

EC-570
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HO2S1 HEATER
Diagnostic Procedure
EBS00BJU
1.CHECK OVERALL FUNCTION CHECK
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch "OFF" and wait at least 10 seconds.
3. Turn ignition switch "ON".
4. Set the tester probe between ECM terminals 2 (HO2S1 heater signal) and ground.
5. Start engine and let it idle.
6. Check the voltage under the following conditions.
Verify that the oscilloscope screen shows the signal wave as
shown below.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
OK or NG
OK >>INSPECTION END.
NG >> GO TO 2.
2.CHECK HO2S1 POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 1 harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between HO2S1 terminal 4 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
Conditions Voltage
At idleApproximately 7.0V
Engine speed is above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
PBIB0673EPBIB0519E
PBIB0500E
Voltage: Battery voltage
PBIB0541E

HO2S1 HEATER
EC-571
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3.DETECT MALFUNCTIONING PART
Check the following.
lHarness connectors E60, F36
lFuse block (J/B) connector E103
l10A fuse
lHarness for open or short between heated oxygen sensor 1 and fuse
>> Repair harness or connectors.
4.CHECK HO2S1 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 2 and HO2S1 terminal 1.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer toEC-572, "
Component Inspection".
OK or NG
OK >> GO TO 6.
NG >> Replace heated oxygen sensor 1.
6.CHECK INTERMITTENT INCIDENT
Refer toEC-453, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END Continuity should exist.

EC-572
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HO2S1 HEATER
Component Inspection
EBS00BJV
HEATED OXYGEN SENSOT 1 HEATER
1. Check resistance between HO2S1 terminals as follows.
2. If NG, replace heated oxygen sensor 1.
CAUTION:
Discard any heated oxygen sensor which has been dropped
from a height of more than 0.5 m (19.7 in) onto a hard surface
such as a concrete floor; use a new one.
Removal and InstallationEBS00BJW
HEATED OXYGEN SENSOR 1
Refer toEM-22, "EXHAUST MANIFOLD AND THREE WAY CATALYST".
Terminal No. Resistance
1 and 4 2.3 - 4.3Wat 25°C(77°F)
2 and 3, 4
¥W
(Continuity should not exist)
3 and 1, 2, 4
PBIB0542E