NISSAN X-TRAIL 2003 Electronic Repair Manual

TROUBLE DIAGNOSIS
EC-427
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EC
ECM Harness Connector Terminal LayoutEBS00BN1
ECM Terminals and Reference ValueEBS00BN2
PREPARATION
1. ECM is located behind the glove box. For this inspection,
remove glove box.
2. Remove ECM harness protector.
3. Perform all voltage measurements with the connector con-
nected. Extend tester probe as shown to perform tests easily.
lOpen harness securing clip to make testing easier.
lUse extreme care not to touch 2 pins at one time.
lData is for comparison and may not be exact.
ECM INSPECTION TABLE
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.
SEF970W
PBIB0493E
MEC486B
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
2P/LHeated oxygen sen-
sor 1 heater[Engineisrunning]
lWarm-up condition
lEngine speed is below 3,600 rpm.Approximately 7.0V
[Engineisrunning]
lEngine speed is above 3,600 rpm.BATTERY VOLTAGE
(11 - 14V)
PBIB0519E

EC-428
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TROUBLE DIAGNOSIS
4PU/RHeated oxygen sen-
sor 2 heater[Engine is running]
lEngine speed is below 3,800 rpm.
lAfter driving for 2 minutes at a speed of 70 km/h
(43 MPH) or more.0-1.0V
[Ignition switch “ON”]
lEngine stopped
[Engine is running]
lEngine speed is above 3,800 rpm.BATTERY VOLTAGE
(11 - 14V)
12 R/BCounter current
return[Ignition switch "ON"]BATTERY VOLTAGE
(11 - 14V)
13 PEVAP canister purge
volume control sole-
noid valve[Engine is running]
lIdle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
lEngine speed is about 2,000 rpmApproximately 10V
18 R/Y MI[Ignition switch “ON”]0-1.0V
[Engine is running]
lIdle speedBATTERY VOLTAGE
(11 - 14V)
20 W/GECM relay
(Self shut-off)[Engine is running]
[Ignition switch “OFF”]
lFor 3 seconds after turning ignition switch “OFF”0-1.0V
[Ignition switch “OFF”]
l3 seconds passed after turning ignition switch
“OFF”BATTERY VOLTAGE
(11 - 14V)
21
22
23
24BR
PU
L/R
GY/RIgnition signal No. 1
Ignition signal No. 2
Ignition signal No. 3
Ignition signal No. 4[Engine is running]
lWarm-up condition
lIdle speed0-0.1V
[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm.0-0.2V
26 L Air conditioner relay[Engine is running]
lBoth A/C switch and blower switch are “ON”
(Compressor operates).0-1.0V
[Engine is running]
lA/C switch is “OFF”.BATTERY VOLTAGE
(11 - 14V) TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0520E
PBIB0521E
PBIB0522E

TROUBLE DIAGNOSIS
EC-429
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EC27 LG/BCooling fan relay
(High)[Engineisrunning]lCooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engineisrunning]
lCooling fan is high speed operating0-1.0V
29 B/P Fuel pump relay[Ignition switch “ON”]
lFor 1 seconds after turning ignition switch “ON”
[Engineisrunning]0-1.0V
[Ignition switch “ON”]
lMore than 1 seconds after turning ignition switch
“ON”.BATTERY VOLTAGE
(11 - 14V)
30 PU/WAir conditioner cut
signal[Engineisrunning]
lBoth A/C switch and blower switch are “ON”
(Compressor operates).Approximately 0V
[Engineisrunning]
lA/C switch is “ON”
(Compressor not operates).Approximately 4.6V
33B/W
(With A/T)
W
(With M/T)CAN communication
line[Ignition switch “ON”]Approximately 2.6V
Output voltage varies with the
communication status.
34L/R
(With A/T)
R
(With M/T)CAN communication
line[Ignition switch “ON”]Approximately 2.4V
Output voltage varies with the
communication status.
36 L/OR Tachometer signal[Engineisrunning]
lWarm-up condition
lIdle speed6-7V
[Engineisrunning]
lEngine speed is 2,500 rpm6-7V
37 LGCooling fan relay
(Low)[Engineisrunning]
lCooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engineisrunning]
lCooling fan is operating0-1.0V
40 P Stop lamp switch[Engineisrunning]
lBrake pedal fully releasedApproximately 0V
[Engineisrunning]
lBrake pedal fully depressedBATTERY VOLTAGE
(11 - 14V)
41 B/Y Start signal[Ignition switch “ON”]Approximately 0V
[Ignition switch “START”]9-14V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0523E
PBIB0524E

EC-430
[QR (WITHOUT 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-431
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EC65 RSensor's power sup-
ply[Ignition switch “ON”]Approximately 5V
66 W/LPower supply for
ECM (Buck-up)[Ignition switch “OFF”]BATTERY VOLTAGE
(11 - 14V)
67 PPower steering pres-
sure sensor[Engineisrunning]
lSteering wheel is being turned.0.5 - 4.0V
[Engineisrunning]
lSteering wheel is not being turned.0.4 - 0.8V
71 PU/RCrankshaft position
sensor (POS)[Engineisrunning]
lWarm-up condition
lIdle speedApproximately 3V
[Engineisrunning]
lEngine speed is 2,000 rpmApproximately 3V
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
73 WThrottlepositionsen-
sor 1[Ignition switch "ON"]
lGear position is "D" (A/T model)
lGear position is "1st" (M/T model)
lAccelerator pedal fully releasedMore than 0.36V
[Ignition switch “ON”]
lGear position is "D" (A/T model)
lGear position is "1st" (M/T model)
lAccelerator pedal fully depressedLess than 4.75V
74 GThrottlepositionsen-
sor 2[Ignition switch "ON"]
lGear position is "D" (A/T model)
lGear position is "1st" (M/T model)
lAccelerator pedal fully releasedLess than 4.75V
[Ignition switch “ON”]
lGear position is "D" (A/T model)
lGear position is "1st" (M/T model)
lAccelerator pedal fully depressedMore than 0.36V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0527E
PBIB0528E

EC-432
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
75 R/LAccelerator pedal
position sensor 1[Ignition switch "ON"]lAccelerator pedal fully released0.41 - 0.71V
[Ignition switch "ON"]
lAccelerator pedal fully depressedMore than 3.9V
76 B/WAccelerator pedal
position sensor 2[Ignition switch "ON"]
lAccelerator pedal fully released0.09 - 0.48V
[Ignition switch "ON"]
lAccelerator pedal fully depressedMore than 1.9V
80 B/PMass air flow sensor
ground[Engine is running]
lWarm-up condition
lIdle speedApproximately 0V
81 L/B Vehicle speed sensor[Engine is running]
lLift up the vehicle
lVehicle speed is 40 km/h (25MPH)Approximately 2.3V
82 W Knock sensor[Engine is running]
lIdle speedApproximately 2.5V
83 R/LRefrigerant pressure
sensor[Engine is running]
lWarm-up condition
lBoth A/C switch and blower switch are “ON”.
(Compressor operates.)1.0 - 4.0V
84 Y/GIntake air tempera-
ture sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with intake
air temperature.
86 LAccelerator pedal
position sensor 2
ground[Ignition switch “ON”]Approximately 0V
90 WAccelerator pedal
position sensor sig-
nal output[Ignition switch "ON"]
lAccelerator pedal fully released0.41 - 0.71V
[Ignition switch “ON”]
lAccelerator pedal fully depressedMore than 3.9V
92 G/WHeated oxygen sen-
sor 1[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm.0 - Approximately 1.0V (Periodi-
cally change)
93 BR/YEngine coolant tem-
perature sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with
engine coolant temperature.
95 OR/BHeated oxygen sen-
sor 2[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm.0 - Approximately 1.0V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0531E

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
lIdle speedBATTERY VOLTAGE
(11 - 14V)
[Engineisrunning]
lWarm-up condition
lEngine speed is 2,000 rpmBATTERY VOLTAGE
(11 - 14V)
107 Y/RIntake valve timing
control solenoid valve[Engineisrunning]
lWarm-up condition
lIdle speedBATTERY VOLTAGE
(11 - 14V)
[Engineisrunning]
lWarm-up condition
lWhenrevvingengineupto2,000rpmquicklyApproximately 4V - BATTERY
V O LTA G E ( 11 - 1 4 V )
109
111W
WPower supply for
ECM[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
11 2 W / RThrottle control motor
relay[Ignition switch "OFF"]BATTERY VOLTAGE
(11 - 14V)
[Ignition switch "ON"]0-1.0V
11 3 W / BThrottle control motor
relay power supply[Ignition switch "ON"]BATTERY VOLTAGE
(11 - 14V)
11 4 RThrottle control motor
(Open)[Ignition switch "ON"]
lGear position is "D" (A/T model)
lGear position is "1st" (M/T model)
lAccelerator pedal is depressing0-14V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0529E
PBIB0530E
PBIB0532E
PBIB0533E

EC-434
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
CONSULT-II FunctionEBS00BN3
FUNCTION
*1 The following emission-related diagnostic information is cleared when the ECM memory is erased.
1. Diagnostic trouble codes
2. 1st trip diagnostic trouble codes
3. Freeze frame data
4. 1st trip freeze frame data
5. Others11 5 B / YThrottle control motor
ground[Engine is running]
lIdle speedApproximately 0V
11 6 GThrottle control motor
(Close)[Ignition switch "ON"]
lGear position is "D" (A/T model)
lGear position is "1st" (M/T model)
lAccelerator pedal is releasing0 - 14V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0534E
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.

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 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´´´

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 “START”.
5. Touch “ENGINE”.
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
PBIB0376E
PBR455D
SEF995X
SEF824Y
WORK ITEM CONDITION USAGE
FUEL PRESSURE RELEASE
lFUEL 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
lTHE IDLE AIR VOLUME THAT KEEPS THE ENGINE
WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM.When learning the idle air volume