fog light NISSAN X-TRAIL 2003 Electronic Repair Manual

TIME CONTROL UNIT
BCS-3
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TIME CONTROL UNITPFP:28491
DescriptionEKS002ZU
OUTLINE
The time control unit totally controls the following body electrical system operations.
lWarning chime
lRear defogger
lPower door lock
lInterior lamp
INPUT/OUTPUT
System Input Output
PowerdoorlockDoor lock and unlock switch
Door switches
Door unlock sensor
Door key cylinder switch (driver side)Door lock actuators
Warning chimeKey switch (Insert)
Ignition switch (ON)
Lighting switch (1st)
Front door switch (driver side)
Door unlock sensorWarning chime (located in time control unit)
Rear window defoggerIgnition switch (ON)
Rear window defogger switchRear window defogger relay
Interior lampDoor switches
Front door unlock sensor
Ignition switch (ON)
Key switch (Insert)Interior lamp

TIME CONTROL UNIT
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Time Control Unit Inspection TableEKS002ZW
Te r m i n a l
No.Wire
colorConnections Operation conditionVo l ta g e
(Approxi-
mate values)
1 L/B Power source (Fuse) — 12V
3 L/Y Super lock actuator Door key cylinder switchFree 0V
Unlocked 12V
4G/RPassenger and rear doors lock
actuatorDoor lock/unlock switchFree 0V
Unlocked 12V
6 Y/R Super lock actuator Door key cylinder switchFree 0V
Locked 12V
10 W Power source (C/B) — 12V
11 L Driver's door lock actuator Door lock/unlock switchFree 0V
Unlocked 12V
14 R/B Door lock actuator Door lock/unlock switchFree 0V
Locked 12V
16 B Ground — 0V
17 G Ignition switch (ON) — 12V
18 W/L Ignition key switch (Insert) Key inserted®key removed from IGN key cylinder 12V®0V
19 R/L Lighting switch 1ST, 2ND position: ON®OFF 12V®0V
20 GY Door lock/Unlock switch Neutral®Locks 5V®0V
23 PU Door lock/Unlock switch Neutral®Unlocks 5V®0V
24 OR/L Door key cylinder switch OFF (Neutral)®ON (Locked) 5V®0V
25 W/L Door key cylinder switch OFF (Neutral)®ON (Unlocked) 5V®0V
26 R/Y Interior room lampWhen interior room lamp is operated using remote control-
ler (Lamp switch is “DOOR” position)12V®0V
27 G/W Rear window defogger relay OFF®ON (Ignition key is in “ON” position) 12V®0V
28 Y/G Driver door unlock sensor Driver door: Locked®Unlocked 5V®0V
29 Y/L Passenger door unlock sensor Passenger door: Locked®Unlocked 5V®0V
30 R Doorswitchdriverside OFF(closed)®ON (open) 5V®0V
31 R/W Passenger and rear doors switch OFF (closed)®ON (open) 5V®0V
32 OR Multi-remote control unitRemote controller lock button is pushed.
(Ignition switch is not at “ON” position)0V®5V
33 P/L Multi-remote control unitRemote controller unlock button is pushed.
(Ignition switch is not at “ON” position)0V®5V
35 LG/B Rear window defogger switch OFF®ON 5V®0V

EC-32
[QR (WITH EURO-OBD)]
BASIC SERVICE PROCEDURE
PREPARATION
Before performing “Idle Air Volume Learning”, make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.
lBattery voltage: More than 12.9V (At idle)
lEngine coolant temperature: 70 - 100°C (158 - 212°F)
lPNP switch: ON
lElectric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime light systems, set lighting switch to the 1st position to light
only small lamps.
lSteering wheel: Neutral (Straight-ahead position)
lVehicle speed: Stopped
lTransmission: Warmed-up
For A/T models with CONSULT-II, drive vehicle until “FLUID TEMP SE” in “DATA MONITOR” mode of “A/
T” system indicates less than 0.9V.
For A/T models without CONSULT-II and M/T models, drive vehicle for 10 minutes.
OPERATION PROCEDURE
With CONSULT-II
1. PerformEC-31, "Accelerator Pedal Released Position Learning".
2. PerformEC-31, "
Throttle Valve Closed Position Learning".
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic “PRE-CONDITIONING” (previously mentioned) are in good
order.
5. Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.
6. Touch “START” and wait 20 seconds.
SEF452Y
SEF454Y

EC-82
[QR (WITH EURO-OBD)]
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-91
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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

TROUBLE DIAGNOSIS
EC-99
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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

TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-103
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TROUBLE DIAGNOSIS - SPECIFICATION VALUEPFP:00031
DescriptionEBS00B1J
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
MI.
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 ConditionEBS00B1K
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 ProcedureEBS00B1L
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-104, "
Diagnostic Procedure".
SEF601Z

ELECTRICAL LOAD SIGNAL
EC-363
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ELECTRICAL LOAD SIGNALPFP:25350
CONSULT-II Reference Value in Data Monitor ModeEBS00BDX
Specification data are reference values.
ECM Terminals and Reference ValueEBS00BDY
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.
MONITOR ITEM CONDITION SPECIFICATION
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
HEATER FAN SW
lEngine: After warming up, idle
the engineHeater fan is operating. ON
Heater fan is not operating OFF
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
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

EC-366
[QR (WITH EURO-OBD)]
ELECTRICAL LOAD SIGNAL
Diagnostic Procedure
EBS00BE0
1.INSPECTION START
DoyouhaveCONSULT-II?
Ye s o r N o
Yes >>GOTO2.
No >> GO TO 5.
2.CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “LOAD SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >> GO TO 3.
NG >> GO TO 8.
3.CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “LOAD SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >> GO TO 4.
NG >> GO TO 12.
4.CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “LOAD SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 16.
Condition LOAD SIGNAL
Rear window defogger switch "ON" ON
Rear window defogger switch "OFF" OFF
PBIB0103E
Condition LOAD SIGNAL
Lighting switch "ON" at 2nd position ON
Lighting switch "OFF" OFF
PBIB0103E
Condition LOAD SIGNAL
Heater fan control switch "ON" ON
Heater fan control switch "OFF" OFF
PBIB0103E

ELECTRICAL LOAD SIGNAL
EC-367
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5.CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
Wi th ou t C O N S U LT-I I
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 52 and ground under the
following conditions.
OK or NG
OK >> GO TO 6.
NG >> GO TO 8.
6.CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
Wi th ou t C O N S U LT-I I
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 53 and ground under the
following conditions.
OK or NG
OK >> GO TO 7.
NG >> GO TO 12.
7.CHECK HEATER FAN CONTROL CIRCUIT OVERALL FUNCTION
Wi th ou t C O N S U LT-I I
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 55 and ground under the
following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 16.
8.CHECK REAR WINDOW DEFOGGER FUNCTION
1. Start engine.
2. Turn “ON” the rear window defogger switch.
3. Check the rear windshield. Is the rear windshield heated up?
Ye s o r N o
Yes >>GOTO9.
No >> Refer toGW-9, "
REAR WINDOW DEFOGGER".
Condition Voltage
Rear window defogger switch "ON" BATTERY VOLTAGE
Rear window defogger switch "OFF" 0V
PBIB0660E
Condition Voltage
Lighting switch "ON" at 2nd position BATTERY VOLTAGE
Lighting switch "OFF" 0V
PBIB0070E
Condition Voltage
Heater fan control switch "ON" 0V
heater fan control switch "OFF" Approximately 5V
PBIB0661E