2005 NISSAN X-TRAIL sensor

ENGINE CONTROL SYSTEM
EC-991
[YD (WITH EURO-OBD)]
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4WD Models With ESP
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
T: Transmit R: Receive Glow indicator lamp signal T R
A/C switch signal R TSignals ECMABS actuator and
electric unit
(control unit)4WD control unit Combination meter
Signals ECMESP/TCS/ABS
control unitSteering angle
sensor4WD control
unitCombination
meter
4WD mode indicator lamp signalTR
4WD warning lamp signalTR
A/C switch signal RT
ABS warning lamp signal T R
Accelerator pedal position signal T R R
Brake warning lamp signal T R
Engine coolant temperature signal TR
Engine speed signal T R R R
ESP OFF indicator lamp signal T R
Glow indicator lamp signal TR
MI signal TR
Stop lamp switch signal T R
Vehicle speed signalTRR
RT
SLIP indicator lamp signal T R
Parking brake switch signalRT
Steering angle sensor signal R T
ASCD SET lamp signal TR
ASCD CRUISE lamp signal TR
PKIA9634E

ENGINE CONTROL SYSTEM
EC-993
[YD (WITH EURO-OBD)]
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2WD Models With ESP
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
T: Transmit R: Receive
PKIC0343E
Signals ECM ESP/TCS/ABS control unit Steering angle sensor Combination meter
A/C switch signal RT
ABS warning lamp signal T R
Accelerator pedal position signal T R
Brake warning lamp signal T R
Engine coolant temperature signal TR
Engine speed signal T R R
ESP OFF indicator lamp signal T R
Glow indicator lamp signal TR
MI signal TR
Vehicle speed signalTR
RT
SLIP indicator lamp signal T R
Steering angle sensor signal R T
ASCD SET lamp signal TR
ASCD CRUISE lamp signal TR

EC-994
[YD (WITH EURO-OBD)]
BASIC SERVICE PROCEDURE

BASIC SERVICE PROCEDUREPFP:00018
Fuel FilterEBS01172
DESCRIPTION
A water draining cock is on the lower side and a priming pump for bleeding air is on the upper side.
AIR BLEEDING
Pump the priming pump to bleed air.

When air is bled completely, the pumping of the priming pump
suddenly becomes heavy. Stop the operation at that time.

If it is difficult to bleed air by the pumping of the priming pump
(the pumping of the priming pump does not become heavy), dis-
connect the fuel supply hose between the fuel filter and the fuel
gallery. Then, perform the operation described above, and make
sure that fuel comes out. (Use a pan, etc. so as not to spill fuel.
Do not let fuel get on engine and other parts.) After that, connect
the hose, then bleed air again.

Start engine and let it idle for at least 1 minute after performing
air bleeding.
WATER DRAINING
1. Remove the fuel filter, filter bracket, protector assembly from the dash panel as follows.
a. Remove the air cleaner case (upper), air duct assembly, and vacuum hose for brake booster (between the
vacuum pump and vacuum pipe).
CAUTION:
After the duct is removed, cover the opening with gum tape, etc. to prevent foreign object from
getting into the engine during the operation.
b. Remove the mounting nuts on the dash panel, then remove the fuel filter, filter bracket, and protector
assembly from the dash panel.

It is not necessary to disconnect the fuel hose.
2. Using a tool such as a pliers, loosen the water draining cock at
the bottom of the fuel filter.
Loosening drain cock four to five turns causes water to
start draining.
Do not remove drain cock by loosening it excessively.
If water dose not drain properly, move the priming up and down.
CAUTION:
When the water is drained, the fuel is also drained. Use a
pan, etc. to avoid fuel adherence to the rubber parts such as
the engine mount insulator.
Do not over-tighten the water draining cock. This will dam-
age the cock thread, resulting in water or fuel leak.
3. Bleed air of the fuel filter. Refer to EC-994, "
AIR BLEEDING" .
4. Start the engine.
Fuel Pump Learning Value ClearingEBS01173
DESCRIPTION
In order to always keep optimum fuel pressure in fuel rail, the ECM controls fuel pump in high precision with
monitoring the signal of fuel rail pressure sensor.
Accordingly, the ECM always learns characteristic value of fuel pump. Fuel Pump Learning Value Clearing is
an operating to clear the value of the fuel pump learning.
It must be performed after the fuel pump is changed. When the ECM is replaced with brand new one, the Fuel
Pump Learning Value Clearing is not necessary to be performed. If the ECM to be replaced has the possibility
of learning the characteristic value of fuel pump, the Fuel Pump Learning Value Clearing is necessary to be
performed after the ECM has been replaced.
OPERATION PROCEDURE
NOTE:
When removing fuel pump, perform Fuel Pump Learning Value Clearing before starting engine.
PBIB1932E
SMA825B

EC-996
[YD (WITH EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM

ON BOARD DIAGNOSTIC (OBD) SYSTEMPFP:00028
IntroductionEBS011UJ
The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actua-
tors. The ECM also records various emission-related diagnostic information including:
The above information can be checked using procedures listed in the table below.
×: Applicable —: Not applicable
*: When DTC and 1st/2nd trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other.
The malfunction indicator (MI) on the instrument panel lights up when the same malfunction is detected in
three consecutive trips (Three trip detection logic).
Three Trip Detection Logic and One Trip Detection LogicEBS011UK
On board diagnosis (OBD) system of this vehicle has “Three Trip Detection Logic” and “One Trip Detection
Logic”. For which logic each self-diagnosis corresponds with, refer to EC-973, "
INDEX FOR DTC" .
“Trip” of “Three Trip Detection Logic” means a driving mode in which the self-diagnosis is performed while
driving.
THREE TRIP DETECTION LOGIC
When a malfunction is detected for the first time, 1st trip DTC is stored in the ECM memory. MI does not illumi-
nate at this stage. <1st trip>
When the same malfunction is detected again during the next driving, 2nd trip DTC is stored in the ECM mem-
ory and 1st trip DTC is cleared from the ECM memory. MI does not illuminate at this stage. <2nd trip>
When the same malfunction is detected again at the third driving, DTC and Freeze Frame Data are stored in
the ECM memory and 2nd trip DTC is cleared from the ECM memory. MI illuminates at the same time when
DTC is stored. <3rd trip>
In other words, DTC and Freeze Frame Data are stored and MI illuminates when the same malfunction occurs
in 3 consecutive trips.
This is called “Three Trip Detection Logic”.
ONE TRIP DETECTION LOGIC
When a malfunction is detected for the first time, DTC and Freeze Frame Data are stored in the ECM memory
and MI lights up. This is called “One Trip Detection Logic”. Some self-diagnoses will not illuminate MI when
DTC is stored. (Refer to EC-996, "
Emission-related Diagnostic Information" .) 1st/2nd trip DTC is not stored for
one trip detection logic.
Emission-related Diagnostic InformationEBS011UL
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS
X: Applicable —: Not applicable Emission-related diagnostic information ISO Standard
Diagnostic Trouble Code (DTC) Service $03 of ISO 15031-5
Freeze Frame data Service $02 of ISO 15031-5
1st/2nd Trip Diagnostic Trouble Code (1st/2nd Trip DTC) Service $07 of ISO 15031-5
Calibration ID Service $09 of ISO 15031-5
DTC 1st trip DTC 2nd trip DTC Freeze Frame data
CONSULT-II××××
GST××××
ECM××*×*—
Items
(CONSULT-II screen item) DTC*
11st/2nd trip
DTCMI lighting
upReference page
CONSULT-II
GST*
2ECM*3
CAN COMM CIRCUIT U1000 1000 — —EC-1056
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0000—— —
CMP/CKP RELATION P0016 0016××EC-1059

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-997
[YD (WITH EURO-OBD)]
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TC BOOST SOL/CIRC P0045 0045××EC-1061
HIGH FUEL PRESS P0088 0088××EC-1066
FUEL PUMP P0089 0089××EC-1068
FUEL LEAK P0093 0093××EC-1071
MAF SENSOR P0101 0101××EC-1075
MAF SEN/CIRCUIT P0102 0102××EC-1083
MAF SEN/CIRCUIT P0103 0103××EC-1083
IAT SEN/CIRCUIT P0112 0112××EC-1088
IAT SEN/CIRCUIT P0113 0113××EC-1088
ECT SEN/CIRC P0117 0117××EC-1093
ECT SEN/CIRC P0118 0118××EC-1093
APP SEN 1/CIRCUIT P0122 0122 — —EC-1099
APP SEN 1/CIRCUIT P0123 0123 — —EC-1099
FUEL TEMP SEN/CIRC P0182 0182××EC-1106
FUEL TEMP SEN/CIRC P0183 0183××EC-1106
FRP SEN/CIRC P0192 0192××EC-1110
FRP SEN/CIRC P0193 0193××EC-1110
INJECTOR P0200 0200××EC-1116
CYL1 INJECTOR P0201 0201××EC-1118
CYL2 INJECTOR P0202 0202××EC-1118
CYL3 INJECTOR P0203 0203××EC-1118
CYL4 INJECTOR P0204 0204××EC-1118
ENG OVER TEMP P0217 0217 —×EC-1124
APP SEN 2/CIRCUIT P0222 0222 — —EC-1138
APP SEN 2/CIRCUIT P0223 0223 — —EC-1138
TC SYSTEM P0234 0234 — —EC-1145
TC BOOST SEN/CIRC P0237 0237××EC-1151
TC BOOST SEN/CIRC P0238 0238××EC-1151
CKP SEN/CIRCUIT P0335 0335××EC-1157
CKP SENSOR P0336 0336××EC-1163
CMP SEN/CIRCUIT P0340 0340××EC-1169
CMP SENSOR P0341 0341××EC-1175
GLOW RELAY P0380 0380××EC-1182
EGR SYSTEM P0401 0401××EC-1186
EGR VALVE P0404 0404××EC-1193
VEHICLE SPEED P0501 0501 — —EC-1200
VEHICLE SPEED P0502 0502 — —EC-1202
VEHICLE SPEED P0503 0503 — —EC-1204
BRAKE SW/CIRCUIT P0504 0504 — —EC-1206
BATTERY VOLTAGE P0563 0563 — —EC-1215
STRG SW/CIRC P0580 0580 — —EC-1218
STRG SW/CIRC P0581 0581 — —EC-1218
Items
(CONSULT-II screen item) DTC*
11st/2nd trip
DTCMI lighting
upReference page
CONSULT-II
GST*
2ECM*3

EC-998
[YD (WITH EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM

*1: 1st trip DTC No. and 2nd trip DTC No. are the same as DTC No.
*2: This number is prescribed by ISO 15031-6.
*3: In Diagnostic Test Mode II (Self diagnostic results), this number is controlled by NISSAN.
DTC AND 1ST/2ND TRIP DTC
The number of 1st/2nd trip DTC is the same as the number of DTC.
When a malfunction is detected during 1st trip, 1st trip DTC is stored in the ECM memory. MI does not illumi-
nate at this time. When the same malfunction is detected in the next trip (2nd trip), 2nd trip DTC is stored in the
ECM memory and 1st trip DTC is cleared from the ECM memory. MI does not illuminate at this time. In addi-
ECM P0605 0605××EC-1227
ECM P0606 0606××EC-1229
FUEL PUMP/CIRC P0628 0628××EC-1231
FUEL PUMP/CIRC P0629 0629××EC-1231
SENSOR PWR/CIRC1 P0642 0642××EC-1236
SENSOR PWR/CIRC1 P0643 0643××EC-1236
SENSOR PWR/CIRC2 P0652 0652××EC-1240
SENSOR PWR/CIRC2 P0653 0653××EC-1240
ECM RELAY P0686 0686 — —EC-1245
TCS C/U FUNCTN P1211 1211 — —EC-1249
TCS/CIRC P1212 1212 — —EC-1250
INJ ADJ RES/CIRC1 P1260 1260××EC-1251
INJ ADJ RES/CIRC1 P1261 1261××EC-1251
INJ ADJ RES/CIRC2 P1262 1262××EC-1251
INJ ADJ RES/CIRC2 P1263 1263××EC-1251
INJ ADJ RES/CIRC3 P1264 1264××EC-1251
INJ ADJ RES/CIRC3 P1265 1265××EC-1251
INJ ADJ RES/CIRC4 P1266 1266××EC-1251
INJ ADJ RES/CIRC4 P1267 1267××EC-1251
INJECTOR 1 P1268 1268 — —EC-1257
INJECTOR 2 P1269 1269 — —EC-1257
INJECTOR 3 P1270 1270 — —EC-1257
INJECTOR 4 P1271 1271 — —EC-1257
FRP RELIEF VALVE P1272 1272××EC-1263
FUEL PUMP P1273 1273××EC-1270
FUEL PUMP P1274 1274 —×EC-1275
FUEL PUMP P1275 1275 —×EC-1280
NATS MALFUNTION P1610 - P1617 1610 - 1617 — —EC-1001
APP SENSOR P2135 2135 — —EC-1285
INJ PWR/CIRC P2146 2146××EC-1292
INJECTOR/CIRC P2147 2147××EC-1297
INJECTOR/CIRC P2148 2148××EC-1297
INJ PWR/CIRC P2149 2149××EC-1292
BARO SEN/CIRC P2228 2228××EC-1303
BARO SEN/CIRC P2229 2229××EC-1303
Items
(CONSULT-II screen item) DTC*
11st/2nd trip
DTCMI lighting
upReference page
CONSULT-II
GST*
2ECM*3

EC-1002
[YD (WITH EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM

HOW TO SWITCH DIAGNOSTIC TEST MODE
NOTE:

It is better to count the time accurately with a clock.

It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.

Always ECM returns to Diagnostic Test Mode I after ignition switch is turned OFF.
How to Set Diagnostic Test Mode II (Self-diagnostic Results)
1. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
2. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the MI starts
blinking.
4. Fully release the accelerator pedal.
ECM has entered to Diagnostic Test Mode II (Self-diagnostic results).
PBIB0092E

TROUBLE DIAGNOSIS
EC-1007
[YD (WITH EURO-OBD)]
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TROUBLE DIAGNOSISPFP:00004
Trouble Diagnosis IntroductionEBS01179
INTRODUCTION
The engine has an ECM to control major systems such as fuel injec-
tion control, fuel injection timing control, glow control system, etc.
The ECM accepts input signals from sensors and instantly actuators.
It is essential that both input and output signals are proper and sta-
ble. At the same time, it is important that there are no malfunctions
such as vacuum leaks, or other malfunctions with the engine.
It is much more difficult to diagnose a malfunction that occurs inter-
mittently rather than continuously. Most intermittent malfunctions are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.
A visual check only may not find the cause of the incidents. A road
test with CONSULT-II (or GST) or a circuit tester connected should
be performed. Follow the EC-1008, "
WORK FLOW" .
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such incidents, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A Diagnostic Worksheet like the example
on next page should be used.
Start your diagnosis by looking for conventional incidents first. This
will help troubleshoot driveability incidents on an electronically con-
trolled engine vehicle.
MEF036D
SEF233G
SEF234G