2005 NISSAN X-TRAIL brake sensor

BRC-56
[ESP/TCS/ABS]
CAN COMMUNICATION

CAN COMMUNICATIONPFP:23710
System DescriptionEFS0067I
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.
CAN Communication UnitEFS0067J
TYPE 4/TYPE 5
System diagram
Input/output signal chart
T: Transmit R: Receive Body typeWagon
Axle4WD 2WD
Engine YD22DDTi QR25DE YD22DDTi
Transmission M/T A/T M/T
Brake controlESP
CAN system type 4 5 6 9
ECM×× × ×
TCM×
ESP/TCS/ABS control unit×× × ×
ABS actuator and electric unit (control unit)
Steering angle sensor×× × ×
4WD control unit×× ×
Combination meter×× × ×
PKIA9634E
Signals ECMESP/TCS/ABS
control unitSteering angle
sensor4WD control
unitCombination
meter
4WD mode indicator lamp signalTR
4WD warning lamp signalTR
A/C compressor feedback signal*
2TR

CAN COMMUNICATION
BRC-57
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

*1: YD engine models only
*2: QR engine models only
TYPE 6
System diagram
Input/output signal chart
T: Transmit R: Receive A/C switch signal*
1RT
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*1 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 Signals ECMESP/TCS/ABS
control unitSteering angle
sensor4WD control
unitCombination
meter
PKIA9635E
Signals ECM TCMESP/TCS/
ABS control
unitSteering
angle sensor4WD control
unitCombination
meter
4WD mode indicator lamp signalTR
4WD warning lamp signalTR
A/C compressor feedback signal TR

BRC-58
[ESP/TCS/ABS]
CAN COMMUNICATION

TYPE 9
System diagram
A/T position indicator lamp signal T R R
A/T self-diagnosis signal R T
ABS warning lamp signal T R
Accelerator pedal position signal T R R
Brake warning lamp signal T R
Closed throttle position signal T R
Engine and A/T integratedTR
RT
Engine coolant temperature signal TR
Engine speed signal T R R R
ESP OFF indicator lamp signal T R
MI signal TR
O/D OFF indicator signal T R
Output shaft revolution signal R T
Overdrive control switch signal R T
P·N range signal R T
SLIP indicator lamp signal T R
Steering angle sensor signal R T
Stop lamp switch signalRT
TR
Vehicle speed signalTRR
RT
Parking brake switch signalRT
Wide open throttle position signal T R
ASCD SET lamp signal TR
ASCD CRUISE lamp signal TR Signals ECM TCMESP/TCS/
ABS control
unitSteering
angle sensor4WD control
unitCombination
meter
PKIC0343E

CAN COMMUNICATION
BRC-59
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Input/output signal chart
T: Transmit R: Receive
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

TROUBLE DIAGNOSIS
BRC-77
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Control Unit Input/Output Signal StandardEFS005W2
REFERENCE VALUE FROM 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 Vehicle stopped 0 [km/h]
Wheel sensor circuit
During driving (Note 1)Almost 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 wheel angle
detected by steering
angle sensorStraight-ahead condition Approx. 0 °
Steering angle sensor
and circuit
Steering – 720 to 720°
YAW RATE SENYaw 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
– 24.3 to 24.1m/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-
plied to the ESP/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

TROUBLE DIAGNOSIS
BRC-83
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

(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 CONSULT-II Instruction Manual.
USV LINE [FL-RR]ESP switch-over solenoid valve 1 on the primary side is open cir-
cuit or shorted, or the control line is open or shorted to the power
supply or the ground.
ESP switch-over sole-
noid valve and circuit.
Refer to BRC-98
. USV LINE [FR-RL]ESP switch-over solenoid valve 1 on the secondary side is open
circuit or shorted, or the control line is open or shorted to the
power supply or the ground.
HSV LINE [FL-RR]ESP switch-over solenoid valve 2 on the primary side is open cir-
cuit or shorted, or the control line is open or shorted to the power
supply or the ground.
HSV LINE [FR-RL]ESP switch-over solenoid valve 2 on the secondary side is open
circuit or shorted, or the control line is open or shorted to the
power supply or the ground.
PUMP MOTOR
ACTUATOR RLY (note) During the actuator motor operating with ON, when the actuator
motor turns OFF, or when the control line for actuator motor relay
is open.Actuator motor, motor
relay, and circuit. Refer
to BRC-101
During the actuator motor operating with OFF, when the actuator
motor turns ON, or when the control line for relay is shorted to
ground.
ABS SENSOR
[ABNORMAL SIGNAL]Wheel sensor input is malfunction.Wheel sensor and cir-
cuit. Refer to BRC-91
BATTERY VOLTAGE
[ABNORMAL]ESP/TCS/ABS control unit battery voltage is too low.ESP/TCS/ABS control
unit battery voltage cir-
cuit and ground circuit.
Refer to BRC-105
ST ANGLE SEN SIGNALNeutral position correction of steering angle sensor is not fin-
ished.Neutral position adjust-
ment of steering angle
sensor. Refer to BRC-
107
ST ANG SEN COM CIRCAN communication system or steering angle sensor is malfunc-
tion.Steering angle sensor
and CAN communication
circuit. Refer to BRC-109
SIDE G-SEN CIRCUITSide G sensor is malfunction, or circuit of side G sensor is open
or shorted.Yaw rate/ Side G sensor
and circuit. Refer to
BRC-97
EMERGENCY BRAKEESP/TCS/ABS control unit malfunction (pressure increase is too
much or too little.)ESP/TCS/ABS control
unit. Refer to BRC-107
CONTROLLER FAILURE ESP/TCS/ABS internal malfunction of control unitESP/TCS/ABS control
unit. Refer to BRC-93
CAN COMM CIRCUIT

CAN communication line is open or shorted.

ESP/TCS/ABS control unit internal malfunction.

Battery voltage for ECM is interrupted instantaneously for
Approx. 0.5 seconds or more.Communication circuit
between ESP/TCS/ABS
control unit and units.
Refer to BRC-109
BR FLUID LEVEL LOWBrake fluid level drops or communication line between the ESP/
TCS/ABS control unit and 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 to BRC-108

ENGINE SIGNAL 1-4, 6 Major engine components are malfunction Engine system. Refer to
BRC-93
Self-Diagnostic item Malfunction detecting condition Check route

BRC-84
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

Operation Procedure
1. After turning OFF ignition switch, connect CONSULT-II and CONVERTER to data link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
2. Turn ignition switch ON.
3. Touch “START (NISSAN BASED VHCL)”, “ABS”, “DATA MONITOR” in order on the CONSULT-II screen.
If “ABS” is not indicated, go to GI-35, "
CONSULT-II Data Link Connector (DLC) Circuit" .
CAUTION:
When “START (NISSAN BASED VHCL)” is touched immediately after starting engine or turning on
ignition switch, “ABS” might not be displayed in the system selection screen. In this case, repeat
the operation from step 1.
4. Return to the Monitor Item Selection screen, and touch “ECU INPUT SIGNALS”, “MAIN SIGNALS” or
“SELECTION FROM MENU”. Refer to the following information.
5. When “START” is touched, the data monitor screen is displayed.
Display Item List
Data Monitor Item (Unit)Data Monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU
GEAR (A/T MODEL)×××The gear position determined
from A/T PNP switch signal is dis-
played.l
SLCT LVR POSI (A/T MODEL)×××Shift position determined from the
A/T PNP switch signal is dis-
played.
FR RH SENSOR [km/h]×××Wheel speed calculated by front
RH wheel sensor signal is dis-
played.
FR LH SENSOR [km/h]×××Wheel speed calculated by front
LH wheel sensor signal is dis-
played.
RR RH SENSOR [km/h]×××Wheel speed calculated by rear
RH wheel sensor signal is dis-
played.
RR LH SENSOR [km/h]×××Wheel speed calculated by rear
LH wheel sensor signal is dis-
played.
ACCEL POS SIG
(%)×––Throttle valve open/close status
judged by the CAN communica-
tion signal is displayed.
ENGINE RPM
(rpm)×–×Engine speed judged by the CAN
communication signal is dis-
played.
CAN COM START
(ON/OFF)––×Communication status of CAN
communication is displayed.
STR ANGLE SIG
(°)×–×Steering wheel angle detected by
the steering angle sensor is dis-
played.
YAW RATE SEN
(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 displayed.

BRC-88
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

For Fast and Accurate DiagnosisEFS005W4
PRECAUTIONS FOR DIAGNOSIS

Before performing diagnosis, always read precautions. Refer to BRC-60, "How to Proceed With Diagno-
sis" .

If ESP/TCS/ABS control unit steering angle sensor, steering system parts or suspension system parts
have been replaced, or if alignment has been adjusted, be sure to adjust neutral position of steering angle
sensor before driving. Refer to BRC-52, "
Adjustment of Steering Angle Sensor Neutral Position" .

After diagnosis is finished, be sure to erase memory. Refer to BRC-81, "SELF-DIAGNOSIS" .

When checking continuity and voltage between units, be sure to check for disconnection, looseness,
bend, or collapse of connector terminals. If any malfunction is found, repair or replace connector termi-
nals.

For intermittent symptoms, possible cause is malfunction in harness, harness connector, or terminals.
Move harness, harness connector, and terminals to check for poor connections.

If a circuit tester is used for the check, be careful not to forcibly extend any connector terminal.

To use CONSULT-II to perform self-diagnosis of ESP/TCS/ABS control unit active tests, or work support,
first stop work, then connect CONSULT-II and select “ABS”.

While self-diagnostic results of CONSULT-II shows malfunction, if CONSULT-II active test is performed,
an engine system malfunction may be indicated. In this case, start engine to resume the normal screen.

ESP/TCS/ABS system electronically controls brake operation and engine output. The following symptoms
may be caused by normal operations:
ON and OFF Timing for ABS Warning Lamp, ESP OFF Indicator Lamp, SLIP Indicator Lamp,
Brake Warning Lamp
×: ON –: OFF Symptom Symptom description Result
Motor operation noiseThis is noise of motor inside ESP/TCS/ABS control unit. Slight noise
may occur during ESP, TCS, and ABS operation.
Normal
When the vehicle speed goes over 20 km/h (12.5 MPH), motor and
valves operating noise may be heard. It happens only once after ignition
switch is ON. This is a normal status of the system operation check.
System operation check
noiseWhen engine starts, slight “click” noise may be heard from engine room.
This is normal and is part of system operation check.Normal
ESP/TCS operation
(SLIP indicator lamp blink-
ing)TCS may activate momentarily if wheel speed changes when driving
over location where friction coefficient varies, when downshifting, or
when fully depressing accelerator pedal.Normal
Cancel the ESP/TCS
function for the
inspection on a chas-
sis dynamometer. When checking speed meter etc. with a 2-wheel-drive chassis dyna-
mometer, vehicle speed is not increased by pressing down on the accel-
erator.
ABS operation (Longer stop-
ping distance)On roads with low friction coefficients, such as snowy roads or gravel
roads, vehicles with ABS may require a longer stopping distance. There-
fore, when driving on such roads, avoid overconfidence and keep speed
sufficiently low.Normal
Insufficient feeling of accel-
erationDepending on road conditions, driver may feel that feeling of accelera-
tion is insufficient. This is because traction control, which controls
engine and brakes to achieve optimal traction, has the highest priority
(for safety). As a result, there may be times when acceleration is slightly
less than usual for the same accelerator pedal operation.Normal
ConditionABS warning
lampESP OFF indi-
cator lampSLIP indicator
lampBrake warning
lamp [Note 1]Remarks
Ignition SW OFF. – – – – –
Approx. 2 seconds after igni-
tion switch is turned ON.×××× [Note 2] –
Approx. 2 seconds later after
ignition switch ON.–––× [Note 2]Go out 2 seconds after
ignition switch is turned
ON.