engine NISSAN X-TRAIL 2003 Electronic Repair Manual

CAN COMMUNICATION
BRC-59
[ESP/TCS/ABS]
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CAN COMMUNICATIONPFP:23710
System DescriptionEFS001CN
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
FOR M/T MODELS
System diagram
Input/output signal chart
T: Transmit R: Receive
SKIA0885E
Signals ECMSteering wheel
angle sensor4WD control unitESP/ TCS / ABS
control unit
Engine speed signal T R R
Accelerator pedal position signal T R
ESP operation signal R R T
TCS operation signal R R T
ABS operation signal R R T
Stop lamp switch signalRT
Steering wheel angle sensor signal T R
ESP-OFFSW signalRT
Wheel speed sensor signalRT
4WD Mode signalTR

TROUBLE DIAGNOSIS
BRC-71
[ESP/TCS/ABS]
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Control Unit Input/Output Signal StandardEFS001A6
STANDARDS USING A CIRCUIT TESTER AND OSCILLOSCOPE
CAUTION:
Connect the connectors for the ESP/TCS/ABS control unit and actuator, and turn the ignition switch
ON.
SFIA0363E
Measure-
ment termi-
nalMeasuring point Standard value (Note 1)(Reference) Check
items for malfunc-
tion
+–
1
Body
groundPower supply Ignition switch ON Battery voltage (Approx. 12V)
Control unit power
supply circuit
2Actuator motor relay,
actuator relay power
supply and steering
angle sensor power sup-
plyIgnition switch ON Battery voltage (Approx. 12V)
7 Actuator motor relayActuator motor being driven
(²Active test²mode with CON-
SULT-II)Approx. 0V
Actuator motor,
motor relay, and
circuit
Actuator motor while the vehicle
is stoppedBattery voltage (Approx. 12V)
36 Actuator relayWhen actuator relay is active.
(the engine running)Approx. 0V
Actuator relay and
circuit
When actuator relay is inactive.
(Fail-safe, engine starts.)Battery voltage (Approx. 12V)
20 Actuator motor monitorWhen actuator relay is active.
(the engine running)Battery voltage (Approx. 12V)
Actuator motor
monitor circuit
When actuator relay is inactive.
(Fail-safe, engine starts.)Approx. 0V

BRC-74
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
(Note 1): When the standard value is checked using a circuit tester for voltage measurement, the connector terminals should not extend
forcefully.
(Note 2): Check the pressure of the tire in normal condition.
(Note 3): ON/OFF timing of the ABS warning lamp
ON: When the ignition switch is turned ON (before engine start) or a malfunction is detected.
OFF: 2 seconds after the engine started (the system is in normal condition).
(Note 4): ESP OFF indicator lamp ON/OFF timing
ON: When the ignition switch is turned ON (before engine start) or a malfunction is detected, if the ESP OFF switch is ON.
OFF: 2 seconds after the engine started (the system is in normal condition) and ESP OFF switch is OFF.67
Body
groundPressure sensorIgnition switch ON Approx. 0V
Pressure sensor
and circuit 68When ignition switch ON and
brake pedal released.Approx. 0.6V
69 Ignition switch ON Approx. 0V
18 Side G sensor Ignition switch ON Approx. 2.5VYaw rate /Side G
sensor and circuit
34
Yaw rate/Side G sensorIgnition switch ON Battery voltage (Approx. 12V)
Yaw rate /Side G
sensor and circuit 77 Ignition switch ON
78 Ignition switch ON Approx. 2.5V
79
Ya w r a t e s e n s o rIgnition switch ON
Ya w r a t e s e n s o r
and circuit
80 Ignition switch ON Approx. 0V
30 ABS warning lampABS warning lamp turns on
(Note 3)Approx. 0V
ABS warning lamp
and circuit
ABS warning lamp turns off
(note 3)Battery voltage (Approx. 12V)
70 ESP OFF indicator lampESP OFF indicator lamp turns
on (Note 4)Approx. 0V
ESP OFF warning
lamp and circuit
ESP OFF indicator lamp turns
off (note 4)Battery voltage (Approx. 12V)
83 SLIP indicator lampWhen SLIP indicator lamp is ON
(Note 5)Approx. 0V
SLIP indicator
lamp and circuit
SLIP indicator lamp turns off
(note 5)Battery voltage (Approx. 12V)
40 Brake fluid level warning
switchBrake fluid is not enough Battery voltage (Approx. 12V) Brake fluid level
warningswitchand
circuit
Brake fluid is enough Approx. 0V
76Body
groundParking brake signalApply the parking brake. Battery voltage (Approx. 12V)
Parking brake
switch and circuit
Release the parking brake. Approx. 0V Measure-
ment termi-
nalMeasuring point Standard value (Note 1)(Reference) Check
items for malfunc-
tion
+–
SFIA0150E
SFIA0151E

TROUBLE DIAGNOSIS
BRC-75
[ESP/TCS/ABS]
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(Note 5): ON/OFF timing of the SLIP indicator lamp
ON: When the ignition switch is turned ON (before engine start) or a malfunction is detected.
OFF: 2 seconds after the engine started (the system is in normal condition) and the ESP/TCS function is inactive.
Flashing: ESP/TCS function is active during driving.
STANDARDS WITH CONSULT-II
CAUTION:
The displayed item is the data calculated by the control unit, so it may indicate a normal value even if
an output circuit (harness) is open or shorted.
Data monitor item ContentsData monitor
(Reference) Check items
for malfunction
ConditionReference value in
normal operation
FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSORWheel speed (Note 1)Vehicle stopped 0 [km/h (MPH)]
Wheel speed sensor cir-
cuit
During drivingAlmost in accor-
dance with the
speedometer dis-
play (within±10%)
ACCEL POS SIGOpen/close condition
of throttle valve (linked
with accelerator pedal)Accelerator pedal not
depressed (ignition switch is
ON)0%Control unit communica-
tion circuit between the
ESP/TCS/ABS control
unit and ECM Accelerator pedal depressed
(ignition switch is ON)0 – 100%
ENG RPMWith the engine run-
ningWith the engine stopped 0rpm
Engine speed signal cir-
cuit
Engine runningAlmost in accor-
dance with
tachometer display
STR ANGLE SIGSteering angle
detected by steering
angle sensorStraight-ahead condition Approx. 0 deg
Steering angle sensor
and circuit
Steering – 720 to 720deg
YAW R AT E S E NYaw rate detected by
yaw rate sensorVehicle stopped Approx. 0 d/s
Yaw rate sensor and cir-
cuit
During driving – 70 to 70d/s
SIDE G-SENSORTransverse accelera-
tion detected by side G
sensorVehicle stopped
Approx. 0 m/s
2
Side G sensor and circuit
During driving
–24.3to24.1m/s2
PRESS SENSORBrake fluid pressure
detected by pressure
sensorWith the ignition switch
turned ON and brake pedal
released.Approx. 0 bar
Pressure sensor and cir-
cuit
With the ignition switch
turned ON and brake pedal
depressed.– 40 to 300bar
BATTERY VOLTBattery voltage sup-
pliedtotheESP/TCS/
ABS control unitIgnition switch ON 10 – 16VESP/TCS/ABS control
unit power supply circuit
and ground circuit
MOTOR RELAYMotor relay
ON/OFF conditionABS not activated. OFF
Motor relay and circuit
ABS activated. ON
ACTUATOR RLYActuator relay
ON/OFF conditionIgnition ON and Vehicle
stopped.OFF
Actuator relay and circuit
Engine running and Vehicle
stopped.ON
STOP LAMP SWOperating status of
brake pedalDepress brake pedal. ON
Stop lamp switch circuit
Release the brake pedal. OFF
PARK BRAKE SW Parking brake statusParking brake activated ON
Parking brake switch cir-
cuit
Parking brake not activated OFF

BRC-76
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
OFF SWESP OFF SW
ON/OFF conditionESP OFF switch ON
(When ESP OFF indicator
lamp is ON.)ON
ESP OFF switch circuit
ESP OFF switch OFF
(When ESP OFF indicator
lamp is OFF.)OFF
ABS WARN LAMPABS warning lamp sta-
tus (Note 2)When ABS warning lamp is
ON.ON
ABS warning lamp circuit
When ABS warning lamp is
OFF.OFF
OFF LAMPESP OFF indicator
lamp status (Note 3)When ESP OFF indicator
lamp is ON.ON
ESP OFF indicator lamp
circuit
When ESP OFF indicator
lamp is OFF.OFF
SLIP LAMPSLIP indicator lamp
status (Note 4)When SLIP indicator lamp is
ONON
SLIP indicator lamp cir-
cuit
When SLIP indicator lamp is
OFFOFF
FR LH IN SOL
FR LH OUT SOL
FR RH IN SOL
FR RH OUT SOL
RR LH IN SOL
RR LH OUT SOL
RR RH IN SOL
RR RH OUT SOLSolenoid valve opera-
tionActuator (solenoid valve) is
active (²Active Test²with
CONSULT-II) or actuator relay
is inactive (in fail-safe mode).ON
Solenoid valve and cir-
cuit
When the actuator (solenoid
valve) is not active and actua-
tor relay is active (ignition
switch ON).OFF
USV [FR-PL]
UISV [FL-RR]
HSV [FR-RL]
HSV [FL-RR]ESP switch-over sole-
noid valve statusWhen the actuator (switch-
over solenoid valve) is active
(²Active test²with CONSULT-
II) or the actuator relay is inac-
tive (when fail-safe mode).ON
Switch-over solenoid
valve and circuit
When the actuator (switch-
over solenoid valve) is inactive
or the actuator relay is active
(ignition switch ON).OFF
V/R OUTPUTActuator relay acti-
vated
(ON/OFF)When the actuator relay is
active (the engine is running).ON
Actuator relay and circuit When the actuator relay is not
active (before the engine get
started and in the fail-safe
mode).OFF
M/R OUTPUTActuator motor and
motor relay status (ON/
OFF)When the actuator motor and
motor relay are active (²Active
test²with CONSULT-II).ON
Actuator motor, motor
relay, and circuit
When the actuator motor and
motor relay are inactive.OFF Data monitor item ContentsData monitor
(Reference) Check items
for malfunction
ConditionReference value in
normal operation

TROUBLE DIAGNOSIS
BRC-77
[ESP/TCS/ABS]
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(Note 1): Check the pressure of the tire in normal condition.
(Note 2): ON/OFF timing of the ABS warning lamp
ON: For approximately 0.5 seconds after the ignition switch is turned ON, or when a malfunction is detected.
OFF: Approximately 0.5 seconds after the ignition switch is turned ON (when the system is in normal operation).
(Note 3): ON/OFF timing of the ESP OFF indicator lamp
ON: For approximately 0.5 seconds after the ignition switch is turned ON, or when a malfunction is detected ESP OFF switch is ON.
OFF: Approximately 0.5 seconds after the ignition switch is turned ON (when the system is in normal operation) or when ESP OFF
switch is OFF.
(Note 4): SLIP indicator lamp ON/OFF timing
ON: For approximately 0.5 seconds after the ignition switch is turned ON, or when a malfunction is detected.
OFF: Approximately 0.5 seconds after the ignition switch is turned ON (when the system is in normal operation) and ESP/TCS function
is not activated.
Flashing: ESP/TCS function is active during driving.
Functions of CONSULT-IIEFS001A7
CONSULT-II MAINLY FUNCTION APPLICATION TO ESP/TCS/ABS
´: Applicable
–: Not applicableFLUID LEV SWBrake fluid level warn-
ingswitchstatus.When brake fluid level warning
switch is ON.ON
Brake fluid level warning
switch, brake warning
lamp and circuit. When brake fluid lever warning
switch is OFF.OFF
EBD FAIL SIG
ABS FAIL SIG
TCS FAIL SIG
VDC FAIL SIGSystem fail signal sta-
tusMalfunctions condition
(When system failed)OFFEBD system
ABS system
TCS system
ESP system Data monitor item ContentsData monitor
(Reference) Check items
for malfunction
ConditionReference value in
normal operation
Item Self-diagnosis Data monitor Active test
Wheel speed sensors´´–
Solenoid valves´´´
Switch-over solenoid valves´´´
Stop lamp switch´´–
Ya w r a te s e n s o r´´´
Side G sensor´´´
Press sensor´´´
Steering angle sensor´´´
Actuator relay´´´
Motor relay´´´
ABS warning lamp –´´
Battery voltage´´–
ESP/TCS/ABS C/U´––
ESP/TCS/ABS actuator motor´´´
CAN communication´´–
Engine speed signal –´–
ESP OFF switch –´–
ESP OFF indicator lamp –´´
SLIP indicator lamp –´´
Throttle angle –´–

BRC-78
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
SELF-DIAGNOSIS
Description
If a malfunction is detected in the system, the ABS warning lamp, ESP OFF indicator lamp, and SLIP indicator
lamp on the meter turn on. In this case, perform the self-diagnosis as follows:
Procedure
1. Perform aBRC-89, "Basic Inspection"using information from the customer.
2. After the ignition switch is turned OFF, connect the CONSULT-II
connector to the vehicle-side data link connector. The data link
connector is on the lower instrument cover).
3. Start the engine and drive at Approx. 30 km/h (19 MPH) for
approx. 1 minute.
4. After stopping the vehicle, with the engine still idling, touch “
START”, “ABS”, “SELF-DIAG RESULTS” on the CONSULT-II
screen in this order.
CAUTION:
Just after starting the engine, or turning the ignition switch
ON,²ABS²may not be displayed on the system selection
screen even if²START²is touched. In this case, start the
self-diagnosis again from step 2. If it cannot be shown after
several attempts, the ESP/TCS/ABS control unit may mal-
function. Repair or replace the control unit.
5. The self-diagnosis result is displayed. (If necessary, touch²PRINT²to print the self-diagnosis result.)
lWhen²NO FAILURE²is shown, check the ABS warning lamp, ESP OFF indicator lamp, SLIP indicator
lamp. Refer toBRC-88, "
For Correct and Quick Diagnosis".
lCONSULT-II self-diagnosis results are displayed without regard to occurrence timing. In some case, the
later ones (timing value is small) appear on the next screen.
6. Go to appropriate²Inspection²chart according to²Self-Diagnostic Items to Result Mode²and repair or
replace as necessary.
7. Start the engine and drive at Approx. 30 km/h (19 MPH) for Approx. 1 minute.
CAUTION:
Check again to make sure that there is NO MALFUNCTION on other parts.
8. Turn the ignition switch OFF to prepare for erasing the memory.
9. Start the engine and touch²START²,²ABS²,²SELF-DIAG RESULTS²and²ERASE²on CONSULT-II
screen in this order to ease the memory.
PBIA0153E
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TROUBLE DIAGNOSIS
BRC-81
[ESP/TCS/ABS]
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(note) “ACTUATOR RLY” on the CONSULT-II self-diagnosis results indicates the malfunction of the actuator motor relay and circuit.
DATA MONITOR
For details of the data monitor function, refer to the CONSULT-II Instruction Manual.
Procedure
1. Turn the ignition switch OFF.
2. Connect the CONSULT-II connector to the vehicle-side data link connector.
3. Turn the ignition switch ON.
4. Touch²START²on the display.
5. Touch²ABS²on the display.
CAUTION:
Just after the engine is started, or the ignition switch is
turned ON,²ABS²may not be displayed on the system
selection screen even if²START²is touched. In this case,
start the self-diagnosis again from step 2.
6. Touch²DATA MONITOR².
7. The data monitor item selection screen is displayed, and touch
one of “ECU INPUT SIGNALS” “MAIN SIGNALS”, “CAN DIAG
SUPPORT MNTR” or “SELECTION FROM MENU”. Refer to
BRC-82, "
Data Monitor Items to be Displayed".
8. Touch²START².
9. Screen of data monitor is displayed.
SIDE G-SEN CIRCUITSide G sensor is abnormal, or the signal line of side G sensor is
open or shorted.Yaw rate /Side G sensor
and circuit. Refer to
BRC-95
EMERGENCY BRAKEESP/TCS/ABS control unit malfunction (pressure increase is too
much or too little.)ESP/TCS/ABS control
unit. Refer toBRC-106
CONTROLLER FAILURE ESP/TCS/ABS internal malfunction of control unitESP/TCS/ABS control
unit. Refer toBRC-92
CAN COMM CIRCUIT
lCAN communication line is open or shorted.
lESP/TCS/ABS control unit internal malfunction.
lBattery voltage for EMC is interrupted instantaneously for
Approx. 0.5 seconds or more.Communication circuit
between ESP/TCS/ABS
control unit and units.
Refer toBRC-108
BR FLUID LEVEL LOWBrake fluid level drops or communication line between the ESP/
TCS/ABS control unit and the brake fluid level warning switch is
open or shorted.Communication circuit
between the ESP/TCS/
ABS control unit and the
brake fluid level warning
switch.
Reservoir tank fluid.
Refer toBRC-107
ENGINE SIGNAL 1-4, 6 Major engine components are abnormalEngine system. Refer to
BRC-92
Self-Diagnostic item Malfunction detecting condition Check route
SFIA0364E
SFIA0365E

BRC-82
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
Data Monitor Items to be Displayed
Data Monitor Item (Unit)Data Monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELECTION
FROM
MENUCAN DIAG
SUPPORT
MNTR
GEAR´´´– “1” is displayed.
SLCT LVR POSI´´´– “##” is displayed.
FR RH SENSOR
(km/h,MPH)´´´–Wheel speed calculated by
front RH wheel speed sensor
signal is displayed.
FR LH SENSOR
(km/h, MPH)´´´–Wheel speed calculated by
front LH wheel speed sensor
signal is displayed.
RR RH SENSOR
(km/h, MPH)´´´–Wheel speed calculated by
rear RH wheel speed sensor
signal is displayed.
RR LH SENSOR
(km/h, MPH)´´´–Wheel speed calculated by
rear LH wheel speed sensor
signal is displayed.
ACCEL POS SIG
(%)´´´–Throttle valve open/close sta-
tus judged by the CAN com-
munication signal is
displayed.
ENGINE RPM
(rpm)´´´–Engine speed judged by the
CAN communication signal is
displayed.
CAN COM START
(ON/OFF)–´´–Communication status of CAN
communication is displayed.
STR ANGLE SIG
(deg)´´´–Steering angle detected by
the steering angle sensor is
displayed.
YAW R AT E S E N
(d/s)´´´–Yaw rate detected by the yaw
rate sensor is displayed.
SIDE G-SENSOR
(m/s
2)´´´–Transverse acceleration
detected by the side G sensor
is displayed.
PRESS SENSOR
(bar )´´´–Brake fluid pressure detected
by the pressure sensor is dis-
played.
BATTERY VOLT
(V )´´´–Voltage supplied to ESP/TCS/
ABS control unit is displayed.
MOTOR RELAY
(ON/OFF )–´´–Motor relay signal (ON/OFF)
status is displayed.
ACTUATOR RLY
(ON/OFF )–´´–Actuator relay signal (ON/
OFF) status is displayed.
STOP LAMP SW
(ON/OFF)´´´–Stop lamp switch (ON/OFF)
status is displayed.
PARK BRAKE SW
(ON/OFF)´´´–Parking brake switch (ON/
OFF) status is displayed.
OFF SW
(ON/OFF)´´´–ESP OFF switch (ON/OFF)
status is displayed.
ABS WARN LAMP
(ON/OFF)–´´–ABS warning lamp (ON/OFF)
status is displayed.
OFF LAMP
(ON/OFF)–´´–ESP OFF indicator lamp (ON/
OFF) status is displayed.

BRC-84
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
´: Applicable
–: Not applicable
ACTIVE TEST
Procedure
CAUTION:
lDo not perform active test while driving the vehicle.
lMake sure that completely bleed air from the brake system.
lThe active test cannot be performed with the ABS warning lamp on.
1. Connect the CONSULT-II connector to the vehicle-side data link connector and start the engine.
2. Touch²START²on the display.
FLUID LEV SW
(ON/OFF)––´–Brake fluid level warning
switch (ON/OFF) status is dis-
played.
SNOW MODE SW
(ON/OFF)––´– “OFF” is displayed.
BST OPER SIG
(ON/OFF)––´– “OFF” is displayed.
CAN COMM
(OK/NG)–––´CAN communication signal
(OK/NG)statusisdisplayed.
CANCIRC1
(ON/ UNKWN)–––´
CAN communication signal
(OK/UNKWN) status is dis-
played. CANCIEC2
(OK/ UNKWN)–––´
CANCIRC5
(OK/ UNKWN)–––´
CANCIRC7
(ON / UNKWN)–––´
MMODESIG
(ON/OFF)––´– “OFF” is displayed.
OD OFF SW
(ON/OFF)––´– “OFF” is displayed.
EBD SIGNAL
(ON/OFF)––´–EBD operation (ON/OFF) sta-
tusisdisplayed.
ABS SIGNAL
(ON/OFF)––´–ABS operation (ON/OFF) sta-
tusisdisplayed.
TCS SIGNAL
(ON/OFF)––´–TCS operation (ON/OFF) sta-
tusisdisplayed.
VDC SIGNAL
(ON/OFF)––´–ESP operation (ON/OFF) sta-
tusisdisplayed. Data Monitor Item (Unit)Data Monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELECTION
FROM
MENUCAN DIAG
SUPPORT
MNTR