2003 NISSAN X-TRAIL heater

EC-24
[QR (WITH EURO-OBD)]
ENGINE CONTROL SYSTEM
System Chart
EBS00B0Q
*1: This sensor is not used to control the engine system under normal conditions.
*2: These signals are sent to the ECM through CAN communication line.
Multiport Fuel Injection (MFI) SystemEBS00B0R
INPUT/OUTPUT SIGNAL CHART
*1: Under normal conditions, this sensor is not for engine control operation.
*2: This signal is sent to the ECM through CAN communication line.Input (Sensor) ECM Function Output (Actuator)
lCamshaft position sensor (PHASE)
lCrankshaft position sensor (POS)
lMass air flow sensor
lEngine coolant temperature sensor
lHeated oxygen sensor 1
lThrottle position sensor
lAccelerator pedal position sensor
lPark/neutral position (PNP) switch
lIntake air temperature sensor
lPower steering pressure sensor
lIgnition switch
lBattery voltage
lKnock sensor
lRefrigerant pressure sensor
lHeated oxygen sensor 2 *1
lTCM (Transmission control module) *2
lESP/TCS/ABS control unit *2
lWheel sensor
lAir conditioner switch
lElectrical loadFuel injection & mixture ratio control Fuel injectors
Electronic ignition system Power transistors
Fuel pump control Fuel pump relay
On board diagnostic system MI (On the instrument panel)
Heated oxygen sensor 1 heater control Heated oxygen sensor 1 heater
Heated oxygen sensor 2 heater control Heated oxygen sensor 2 heater
EVAP canister purge flow controlEVAP canister purge volume control
solenoid valve
Air conditioning cut control Air conditioner relay
Cooling fan control Cooling fan relays
Sensor Input Signal to ECMECM func-
tionActuator
Crankshaft position sensor (POS)
Engine speed
Piston position
Fuel injec-
tion & mix-
ture ratio
controlFuel injectors Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Ignition switch Start signal
Knock sensor Engine knocking condition
Battery Battery voltage
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2 *1 Density of oxygen in exhaust gas
ESP/TCS/ABS control unit *2 ESP/TCS operation command
Wheel sensor Vehicle speed
Air conditioner switch Air conditioner operation

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-41
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EC
*1: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the priority for
models with CONSULT-II.
SRT Set Timing
SRT is set as “CMPLT” after self-diagnosis has been performed one or more times. Completion of SRT is
done regardless of whether the result is OK or NG. The set timing is different between OK and NG results and
is shown in the table below.
OK: Self-diagnosis is carried out and the result is OK.
NG: Self-diagnosis is carried out and the result is NG.
—: Self-diagnosis is not carried out.
When all SRT related self-diagnoses showed OK results in a single cycle (Ignition OFF-ON-OFF), the SRT will
indicate “CMPLT”.®Case 1 above
When all SRT related self-diagnoses showed OK results through several different cycles, the SRT will indicate
“CMPLT” at the time the respective self-diagnoses have at least one OK result.®Case 2 above
If one or more SRT related self-diagnoses showed NG results in 2 consecutive cycles, the SRT will also indi-
cate “CMPLT”.®Case3above
The table above shows that the minimum number of cycles for setting SRT as “INCMP” is one (1) for each
self-diagnosis (Case 1 & 2) or two (2) for one of self-diagnoses (Case 3). However, in preparation for the state
HO2S 1 Heated oxygen sensor 1 P0132
Heated oxygen sensor 1 P0133
Heated oxygen sensor 1 P0134
Heated oxygen sensor 1 P1143
Heated oxygen sensor 1 P1144
Heated oxygen sensor 2 P0138
Heated oxygen sensor 2 P0139
Heated oxygen sensor 2 P1146
Heated oxygen sensor 2 P1147
HO2S HTR 1 Heated oxygen sensor 1 heater P0031, P0032
Heated oxygen sensor 2 heater P0037, P0038 SRT item
(CONSULT-II
indication)Performance
Priority*1Required self-diagnostic items to set the SRT to “CMPLT” Corresponding DTC No.
Self-diagnosis resultExample
DiagnosisIgnition cycle
¬ON®OFF¬ON®OFF¬ON®OFF¬ON®
All OK Case 1 P0400 OK (1) — (1) OK (2) — (2)
P0402 OK (1) — (1) — (1) OK (2)
P1402 OK (1) OK (2) — (2) — (2)
SRT of EGR “CMPLT” “CMPLT” “CMPLT” “CMPLT”
Case 2 P0400 OK (1) — (1) — (1) — (1)
P0402 — (0) — (0) OK (1) — (1)
P1402 OK (1) OK (2) — (2) — (2)
SRT of EGR “INCMP” “INCMP” “CMPLT” “CMPLT”
NG exists Case 3 P0400 OK OK — —
P0402 — — — —
P1402 NG — NGNG
(Consecutive
NG)
(1st trip)
DTC1st trip DTC — 1st trip DTCDTC
(= MI “ON”)
SRT of EGR “INCMP” “INCMP” “INCMP” “CMPLT”

EC-46
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
´: Applicable —: Not applicable
HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION
How to Erase DTC ( With CONSULT-II)
The emission related diagnostic information in the ECM can be erased by selecting “ERASE” in the “SELF-
DIAG RESULTS” mode with CONSULT-II.
If DTCs are displayed for both ECM and TCM (Transmission control module), they need to be erased individu-
ally from the ECM and TCM (Transmission control module).
NOTE:
If the DTC is not for A/T related items (seeEC-12
), skip steps 2 through 4.
1. If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait at least
10 seconds and then turn it “ON” (engine stopped) again.
2. Turn CONSULT-II “ON” and touch “A/T”.
3. Touch “SELF-DIAG RESULTS”.
4. Touch “ERASE”. [The DTC in the TCM (Transmission control module) will be erased.] Then touch “BACK”
twice.
5. Touch “ENGINE”.
6. Touch “SELF-DIAG RESULTS”.
SRT item Self-diagnostic test itemTest value (GST display)
Test limit Application
TID CID
CATALYST Three way catalyst function 01H 01H Max.´
HO2SHeated oxygen sensor 109H 04H Max.´
0AH 84H Min.´
0BH 04H Max.´
0CH 04H Max.´
0DH 04H Max.´
Heated oxygen sensor 219H 86H Min.´
1AH 86H Min.´
1BH 06H Max.´
1CH 06H Max.´
HO2S HTRHeated oxygen sensor 1 heater29H 08H Max.´
2AH 88H Min.´
Heated oxygen sensor 2 heater2DH 0AH Max.´
2EH 8AH Min.´

EC-62
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS
Fail-safe Chart
EBS00BMJ
The ECM enters fail-safe mode, if any of the following malfunctions is detected due to the open or short circuit.
When the ECM enters the fail-safe mode, the MI illuminates.
Priority Detected items (DTC)
1
lU1000 CAN communication line
lP0102 P0103 P1102 Mass air flow sensor
lP0112 P0113 Intake air temperature sensor
lP0117 P0118 Engine coolant temperature sensor
lP0120 Throttle position sensor
lP0121 Accelerator pedal position sensor
lP0327 P0328 Knock sensor
lP0335 Crankshaft position sensor (POS)
lP0340 Camshaft position sensor (PHASE)
lP0500 Vehicle speed sensor
lP0605 ECM
lP0705 Park/Neutral position (PNP) sensor
lP1706 Park/Neutral position (PNP) switch
2
lP0031 P0032 Heated oxygen sensor 1 heater
lP0037 P0038 Heated oxygen sensor 2 heater
lP0132 P0133 P0134 P1143 P1144 Heated oxygen sensor 1
lP0138 P0139 P1146 P1147 Heated oxygen sensor 2
lP0444 P0445 EVAP canister purge volume control solenoid valve
lP0550 Power steering pressure sensor
lP0650 MI
lP0710-P0725, P0740-P0755, P1705 P1760 A/T related sensors and solenoid valves
lP1065 ECM power supply
lP 1111 I n t a k e v a l v e ti m i n g c o n t r o l s o le n o i d v a l v e
lP1122 Electric throttle control function
lP1123 Throttle control motor relay
lP1212 ESP/TCS/ABS communication line
lP1805 Brake switch
3
lP0011 Intake valve timing control
lP0171 P0172 Fuel injection system function
lP0300 - P0304 Misfire
lP0420 Three way catalyst function
lP0731-P0734 A/T function
lP1121 Electric throttle control actuator
lP1217 Engine over temperature (OVERHEAT)
DTC No. Detected items Engine operating condition in fail-safe mode
P0102
P0103
P1102Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.

TROUBLE DIAGNOSIS
EC-79
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ECM Harness Connector Terminal LayoutEBS00BMO
ECM Terminals and Reference ValueEBS00BMP
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-80
[QR (WITH EURO-OBD)]
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

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-87
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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-39
. ItemDIAGNOSTIC TEST MODE
WORK
SUP-
PORTSELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TORDATA
MONI-
TOR
(SPEC)ACTIVE
TESTDTC & SRT
CONFIRMATION
DTC*1FREEZE
FRAME
DATA*2SRT
STATUSDTC
WORK
SUP-
PORT
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´´´´
Accelerator pedal position sensor´´´
Throttle position sensor´´´
Intake air temperature sensor´´´
Knock sensor´
Refrigerant pressure sensor´´
Ignition switch (start signal)´´
Closed throttle position switch
(accelerator pedal position sensor
signal)´´
Air conditioner switch´´
Park/neutral position (PNP) switch´´´
St o p l a m p s w it c h´´´
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 con-
trol solenoid 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´´´