2001 NISSAN X-TRAIL engine control

EC-754
[QR20(WITH EURO-OBD)]
INDEX FOR DTC
*1: 1st trip DTC No. is the same as DTC No.
*2: These numbers are prescribed by ISO 15031-5.
*3: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*4: When engine is running.
*5: When the fail-safe operations for both self-diagnoses occur at the same time, the MI illuminates.
*6: The trouble shooting for this DTC needs CONSULT-II.
*7: Except for M/T models without ESP/TCS/ABS system.
*8: For M/T models with ESP/TCS/ABS system. HO2S2 (B1) P1147 1147 2×EC-1042
HO2S2 HTR (B1) P0037 0037 2×EC-865
HO2S2 HTR (B1) P0038 0038 2×EC-865
IAT SEN/CIRCUIT P0112 0112 2×EC-876
IAT SEN/CIRCUIT P0113 0113 2×EC-876
INT/V TIM CONT-B1 P0011 0011 2×EC-857
INT/V TIM V/CIR-B1 P1111 1111 2×EC-1005
KNOCK SEN/CIRC-B1 P0327 0327 2 –EC-951
KNOCK SEN/CIRC-B1 P0328 0328 2 –EC-951
L/PRESS SOL/CIRC P0745 0745 2×AT- 1 6 3
MAF SEN/CIRCUIT P0102 0102 1×EC-870
MAF SEN/CIRCUIT P0103 0103 1×EC-870
MAF SENSOR P1102 1102 1×EC-999
MIL/CIRC P0650 0650 2 –EC-991
MULTI CYL MISFIRE P0300 0300 2×EC-946
NATS MALFUNCTION P1610 - P1615 1610 - 1615 2 –EC-790
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.No DTC
Flashing*4–
Flashing*4EC-791
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0000––—
O/R CLTCH SOL/CIRC P1760 1760 2×AT- 1 8 5
P-N POS SW/CIRCUIT P1706 1706 2×EC-1064
PNP SW/CIRC P0705 0705 2×AT- 11 0
PURG VOLUME CONT/V P0444 0444 2×EC-972
PURG VOLUME CONT/V P0445 0445 2×EC-972
PW ST P SEN/CIRC P0550 0550 2 –EC-983
SFT SOL A/CIRC P0750 0750 1×AT- 1 7 0
SFT SOL B/CIRC P0755 0755 1×AT- 1 7 5
TCC SOLENOID/CIRC P0740 0740 2×AT- 1 5 8
TCS/CIRC*8P1212 1212 2 –EC-1049
THRTL POS SEN/CIRC P0120 0120 1 or 2× or –EC-886
TP SEN/CIRC A/T P1705 1705 1×AT- 1 8 0
TW CATALYST SYS-B1 P0420 0420 2×EC-968
VEH SPD SEN/CIR AT P0720 0720 2×AT- 1 2 2
VEH SPEED SEN/CIRC P0500 0500 2×EC-978
Items
(CONSULT-II screen terms)DTC*
1
TripMI lighting
upReference page
CONSULT-II
GST*
2ECM*3

EC-756
[QR20(WITH EURO-OBD)]
INDEX FOR DTC
*1: 1st trip DTC No. is the same as DTC No.
*2: These numbers are prescribed by ISO 15031-5.
*3: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*4: When engine is running.
*5: When the fail-safe operations for both self-diagnoses occur at the same time, the MI illuminates.
*6: The trouble shooting for this DTC needs CONSULT-II.
*7: Except for M/T models without ESP/TCS/ABS system.
*8: For M/T models with ESP/TCS/ABS system. P0445 0445 PURG VOLUME CONT/V 2×EC-972
P0500 0500
VEH SPEED SEN/CIRC*52×EC-978
P0550 0550 PW ST P SEN/CIRC 2 –EC-983
P0605 0605 ECM 1 or 2× or –EC-988
P0650 0650 MIL/CIRC 2 –EC-991
P0705 0705 PNP SW/CIRC 2×AT- 11 0
P0710 0710 ATF TEMP SEN/CIRC 2×AT- 11 6
P0720 0720
VEH SPD SEN/CIR AT*52×AT-122
P0725 0725 ENGINE SPEED SIG 2×AT-127
P0731 0731 A/T 1ST GR FNCTN 2×AT-131
P0732 0732 A/T 2ND GR FNCTN 2×AT-137
P0733 0733 A/T 3RD GR FNCTN 2×AT-143
P0734 0734 A/T 4TH GR FNCTN 2×AT-149
P0740 0740 TCC SOLENOID/CIRC 2×AT-158
P0745 0745 L/PRESS SOL/CIRC 2×AT-163
P0750 0750 SFT SOL A/CIRC 1×AT-170
P0755 0755 SFT SOL B/CIRC 1×AT-175
P1065 1065 ECM BACK UP/CIRC 2×EC-995
P1102 1102 MAF SENSOR 1×EC-999
P 1111 1111 I N T / V T I M V / C I R - B 1 2×EC-1005
P1121 1121 ETC ACTR 1 or 2×EC-1010
P1122 1122 ETC FUNCTION/CIRC 1×EC-1012
P1123 1123 ETC MOT RLY/CIRC 1 or 2× or –EC-1018
P1143 1143 HO2S1 (B1) 2×EC-1023
P1144 1144 HO2S1 (B1) 2×EC-1029
P1146 1146 HO2S2 (B1) 2×EC-1035
P1147 1147 HO2S2 (B1) 2×EC-1042
P1212 1212 TCS/CIRC*8 2 –EC-1049
P1217 1217 ENG OVER TEMP 1×EC-1050
P1610 - P1615 1610 - 1615 NATS MALFUNCTION 2 –EC-790
P1705 1705 TP SEN/CIRC A/T 1×AT-180
P1706 1706 P-N POS SW/CIRCUIT 2×EC-1064
P1760 1760 O/R CLTCH SOL/CIRC 2×AT-185
P1805 1805 BRAKE SW/CIRCUIT 2 –EC-1068
DTC*1
Items
(CONSULT-II screen terms)TripMI lighting
upReference page
CONSULT-II
GST*
2ECM*3

PRECAUTIONS
EC-757
[QR20(WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EBS00NBR
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:
●To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
●Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
●Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harness connec-
tors.
On Board Diagnostic (OBD) System of Engine and A/TEBS00MS3
The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) to warn the driver of
a malfunction causing emission deterioration.
CAUTION:
●Be sure to turn the ignition switch OFF and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves,
etc. will cause the MI to light up.
●Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MI to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
●Certain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector. For description and how to disconnect, refer to PG-68, "
HAR-
NESS CONNECTOR" .
●Be sure to route and secure the harnesses properly after work. The interference of the harness
with a bracket, etc. may cause the MI to light up due to the short circuit.
●Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MI to light up due to the malfunction of the fuel injection system, etc.
●Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
PrecautionEBS00MS4
●Always use a 12 volt battery as power source.
●Do not attempt to disconnect battery cables while engine is
running.
●Before connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect negative
battery terminal. Failure to do so may damage the ECM
because battery voltage is applied to ECM even if ignition
switch is turned off.
●Before removing parts, turn ignition switch OFF and then
disconnect battery ground cable.
SEF289H

EC-758
[QR20(WITH EURO-OBD)]
PRECAUTIONS
●Do not disassemble ECM.
●If a battery terminal is disconnected, the memory will return
to the ECM value.
The ECM will now start to self-control at its initial value.
Engine operation can vary slightly when the terminal is dis-
connected. However, this is not an indication of a malfunc-
tion. Do not replace parts because of a slight variation.
●When connecting ECM harness connector, fasten it
securely with a lever as far as it will go as shown at right.
●When connecting or disconnecting pin connectors into or
from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM
pin terminal, when connecting pin connectors.
●Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge)
voltage to develop in coil and condenser, thus resulting in
damage to ICs.
●Keep engine control system harness at least 10 cm (4 in)
away from adjacent harness, to prevent engine control sys-
tem malfunctions due to receiving external noise, degraded
operation of ICs, etc.
●Keep engine control system parts and harness dry.
●Before replacing ECM, perform “ECM Terminals and Refer-
ence Value” inspection and make sure ECM functions prop-
erly. Refer to EC-819
.
●Handle mass air flow sensor carefully to avoid damage.
●Do not disassemble mass air flow sensor.
●Do not clean mass air flow sensor with any type of deter-
gent.
●Do not disassemble electric throttle control actuator.
●Even a slight leak in the air intake system can cause seri-
ous incidents.
●Do not shock or jar the camshaft position sensor (PHASE),
crankshaft position sensor (POS).
SEF707Y
SEF908W
PBIB0090E
MEF040D

EC-760
[QR20(WITH EURO-OBD)]
PRECAUTIONS
●Do not depress accelerator pedal when starting.
●Immediately after starting, do not rev up engine unneces-
sarily.
●Do not rev up engine just prior to shutdown.
●When installing C.B. ham radio or a mobile phone, be sure
to observe the following as it may adversely affect elec-
tronic control systems depending on installation location.
–Keep the antenna as far as possible from the electronic
control units.
–Keep the antenna feeder line more than 20 cm (8 in) away
from the harness of electronic controls.
Do not let them run parallel for a long distance.
–Adjust the antenna and feeder line so that the standing-
wave radio can be kept smaller.
–Be sure to ground the radio to vehicle body.
Wiring Diagrams and Trouble DiagnosisEBS00MS5
When you read Wiring diagrams, refer to the following:
●GI-13, "How to Read Wiring Diagrams"
●PG-2, "POWER SUPPLY ROUTING" for power distribution circuit
When you perform trouble diagnosis, refer to the following:
●GI-10, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES"
●GI-23, "How to Perform Efficient Diagnosis for an Electrical Incident"
SEF709Y
SEF708Y

ENGINE CONTROL SYSTEM
EC-763
[QR20(WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
ENGINE CONTROL SYSTEMPFP:23710
System DiagramEBS00MS8
PBIB0488E

EC-764
[QR20(WITH EURO-OBD)]
ENGINE CONTROL SYSTEM
Vacuum Hose Drawing
EBS00MS9
Refer to EC-763, "System Diagram" for Vacuum Control System.
PBIB0489E

ENGINE CONTROL SYSTEM
EC-765
[QR20(WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
System ChartEBS00MSA
*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) SystemEBS00MSB
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)
●Camshaft position sensor (PHASE)
●Crankshaft position sensor (POS)
●Mass air flow sensor
●Engine coolant temperature sensor
●Heated oxygen sensor 1
●Throttle position sensor
●Accelerator pedal position sensor
●Park/neutral position (PNP) switch
●Intake air temperature sensor
●Power steering pressure sensor
●Ignition switch
●Battery voltage
●Knock sensor
●Refrigerant pressure sensor
●Heated oxygen sensor 2 *1
●TCM (Transmission control module) *2
●ESP/TCS/ABS control unit *2
●Wheel sensor
●Air conditioner switch
●Electrical 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