2003 NISSAN X-TRAIL relay

TROUBLE DIAGNOSIS
BRC-29
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Note 1: After completing repairs of shorted sensor circuit, when ignition switch is turned ON, ABS warning
lamp turns on. Check that ABS warning lamp turns off while driving vehicle at 30 km/h (19 MPH) or more for
approximately 1 minute according to self-diagnosis procedure. In addition, if wheel sensor 2 is displayed for
wheels, check wheel sensor circuit and also check control unit power voltage.
Note 2: When errors are detected in several systems, including CAN communication system [U1000], trouble-
shoot CAN communication system.
DATA MONITOR
Operation Procedure
1. Touch “ABS”, “DATA MONITOR” in order on the CONSULT-II screen.
2. Return to the Monitor Item Selection screen, and touch “ECU INPUT SIGNALS”, “MAIN SIGNALS” or
“SELECTION FROM MENU”. Refer to the following information.
3. When “START” is touched, the data monitor screen is displayed.
Display Item List
CAN COMM CIRCUIT When there is an error in the CAN communication system.
BRC-42, "Inspection 7:
CAN Communication
System" (Note 2)
PUMP MOTOR During actuator motor operation with ON, when actuator motor
turns OFF or when control line for actuator motor relay is open.BRC-38, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
G - SENSORDecel G-sensor is malfunctioning, or signal line of Decel G-sen-
sor is open or shorted. BRC-40, "Inspection 6:
G Sensor System"
Suspect Systems Malfunction detecting condition Inspection system
Item (Unit)SELECT MONITOR ITEM
Remarks
ECU INPUT
SIGNALSMAIN SIGNALSSELECTION
FROM MENU
FR LH SENSOR
[km/h (MPH)]×××Wheel speed calculated by front
LH wheel sensor signal is dis-
played.
FR RH SENSOR
[(km/h (MPH)]×××Wheel speed calculated by front
RH wheel sensor signal is dis-
played.
RR LH SENSOR
[km/h (MPH)]×××Wheel speed calculated by Rear
LH wheel sensor signal is dis-
played.
RR RH SENSOR
[km/h (MPH)]×××Wheel speed calculated by Rear
RH wheel sensor signal is dis-
played.
DECEL G-SEN 1
(ON/OFF)×××Decel G-sensor 1 (ON/OFF) status
is displayed.
DECEL G-SEN 2
(ON/OFF)×××Decel G-sensor 2 (ON/OFF) status
is displayed.
FR LH IN SOL
(ON/OFF)–××Front left inlet ABS solenoid valve
(ON/OFF) status is displayed.
FR LH OUT SOL
(ON/OFF)–××Front left outlet ABS solenoid
valve (ON/OFF) status is dis-
played.
RR RH IN SOL
(ON/OFF)–××Rear right inlet ABS solenoid valve
(ON/OFF) status is displayed.
RR RH OUT SOL
(ON/OFF)–××Rear right outlet ABS solenoid
valve (ON/OFF) status is dis-
played.

BRC-30
[ABS]
TROUBLE DIAGNOSIS

×: Applicable
–: Not applicable FR RH IN SOL
(ON/OFF)–××Front right inlet ABS solenoid
valve (ON/OFF) status is dis-
played.
FR RH OUT SOL
(ON/OFF)–××Front right outlet ABS solenoid
valve (ON/OFF) status is dis-
played.
RR LH IN SOL
(ON/OFF)–××Rear left rear inlet ABS solenoid
valve (ON/OFF) status is dis-
played.
RR LH OUT SOL
(ON/OFF)–××Rear left outlet ABS solenoid valve
(ON/OFF) status is displayed.
STOP LAMP SW
(ON/OFF)×××Stop lamp switch (ON/OFF) status
is displayed.
MOTOR RELAY
(ON/OFF)–××ABS motor relay (ON/OFF) condi-
tion is displayed.
ACTUATOR RLY
(ON/OFF)–××ABS actuator relay (ON/OFF) sta-
tus is displayed.
ABS WARN LAMP
(ON/OFF)–××ABS warning lamp (ON/OFF) sta-
tus is displayed.
BATTERY VOLT
(V )×××The voltage supplied to the ABS
control unit is displayed.
EBD SIGNAL
(ON/OFF)––×EBD operation (ON/OFF) status is
displayed.
ABS SIGNAL
(ON/OFF)––×ABS operation (ON/OFF) status is
displayed.
EBD FAIL SIG
(ON/OFF)––×EBD fail-safe signal (ON/OFF) sta-
tus is displayed.
ABS FAIL SIG
(ON/OFF)––×ABS fail-safe signal (ON/OFF) sta-
tus is displayed. Item (Unit)SELECT MONITOR ITEM
Remarks
ECU INPUT
SIGNALSMAIN SIGNALSSELECTION
FROM MENU

BRC-32
[ABS]
TROUBLE DIAGNOSIS

*: ON for 1 to 2 seconds after the touch, and then OFF
ABS Motor
Touch “ON”, “OFF” on the display screen and make sure ABS motor
relay is operating as shown in the table below.
RR LH SOLRR LH IN SOL OFF ON ON
RR LH OUT SOL OFF OFF ON* OperationABS solenoid valve
UP KEEP DOWN
Operation ON OFF
MOTOR RELAY ON OFF
ACTUATOR RLY ON ON
SFIA0593E

BRC-38
[ABS]
TROUBLE DIAGNOSIS

3. CHECK ABS ACTUATOR AND ELECTRIC UNIT POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector.
2. Turn ignition switch ON or OFF, and then check continuity and voltage between each connector terminal
and ground.
OK or NG
OK >> Check battery for terminal looseness, low voltage, etc. If
any malfunction is found, repair malfunctioning parts.
NG >> Corresponding harness circuit malfunctions. Repair cir-
cuit.
Inspection 4: ABS Actuator Relay or ABS Motor Relay Power SystemEFS004HE
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Is above displayed on self-diagnosis display?
YES >> GO TO 2.
NO >> Inspection End
2. CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connector, and check
the terminal for deformation, disconnection, looseness, and so on. If there is a malfunction, repair or
replace the terminal.
2. Connect the connector securely and perform self-diagnosis again.
OK or NG
OK >> Poor connection of connector terminal
NG >> GO TO 3.
SignalABS actuator and electric
unit (control unit) harness
connector E69GroundMeasure-
ment con-
ditionMeasured
value
Power
supply29 (L)—Ignition
switch ONBattery
voltage
(Approx.
12V)
—Ignition
switch
OFFApprox. 0V
SFIA2019E
SignalABS actuator and electric
unit (control unit) harness
connector E69GroundMeasure-
ment con-
ditionMeasured
value
Ground 16 (B) and 30 (B) —Ignition
switch
OFFContinuity
should
exist.
SFIA2020E
Self-diagnostic results
IN ABS SOL
OUT ABS SOL
MAIN RELAY (ACTUATOR RELAY)
PUMP MOTOR

TROUBLE DIAGNOSIS
BRC-39
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

3. CHECK ABS ACTUATOR RELAY OR ABS MOTOR RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connectors.
2. For the ABS actuator relay, measure voltage between harness
connector E69 terminal 15 (L/W) and ground. For the ABS motor
relay, measure voltage between harness connector E69 terminal
1 (Y) and the ground.
OK or NG
OK >> GO TO 4.
NG >> Circuit malfunction between the battery and ABS actuator and electric unit (control unit). Repair
circuit.
4. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check continuity between ABS actuator and electric unit (control
unit) harness connector E69 terminals 16 (B), 30 (B) and ground.
OK or NG
OK >> Replace ABS actuator and electric unit (control unit).
NG >> Open or short in harness. Repair or replace the harness.
Inspection 5: ABS Actuator and Electric Unit (Control Unit) 2EFS004HG
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Even when “EMERGENCY BRAKE” and any other items are indicated in self-diagnosis display (Note),
replace control unit.
Note: Emergency brake is indicated when the control unit itself detects an internal malfunction.
Is above displayed on self-diagnosis display?
YES >> Replace ABS actuator and electric unit (control unit). Perform self-diagnosis again.
NO >> Inspection EndABS actuator and elec-
tric unit (control unit)
harness connector E69Ground Voltage
1 (Y) — Battery voltage
(Approx. 12V)
15 (L/W) — Battery voltage
(Approx. 12V)
SFIA2021E
ABS actuator and elec-
tric unit (control unit)
harness connector E69Ground Continuity
16 (B) and 30 (B) — Yes
SFIA2022E
Self-diagnostic results
EMERGENCY BRAKE

TROUBLE DIAGNOSIS
BRC-75
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Control Unit Input/Output Signal StandardEFS001A6
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

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
OFF.OFF
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 (“Active Test ”with CON-
SULT-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-RL]
USV [FL-RR]
HSV [FR-RL]
HSV [FL-RR]ESP switch-over sole-
noid valve statusWhen the actuator (switch-
over solenoid valve) is active
(“Active test” with 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 (“Active
test” with CONSULT-II).ON
Actuator motor, motor
relay, and circuit
When the actuator motor and
motor relay are inactive.OFF
FLUID LEV SWBrake fluid level warn-
ing switch status.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
ESP 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

BRC-80
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

Display Item List
Self-Diagnostic item Malfunction detecting condition Check route
FR LH SENSOR – 1 Circuit of front LH wheel sensor is open.
Wheel sensor and cir-
cuit. Refer to BRC-89
RR RH SENSOR – 1 Circuit of rear RH wheel sensor is open.
FR RH SENSOR – 1 Circuit of front RH wheel sensor is open.
RR LH SENSOR – 1 Circuit of rear LH wheel sensor is open.
FR LH SENSOR – 2 Front LH wheel sensor is shorted or input signal is abnormal.
RR RH SENSOR – 2 Rear RH wheel sensor is shorted or input signal is abnormal.
FR RH SENSOR – 2 Front RH wheel sensor is shorted or input signal is abnormal.
RR LH SENSOR – 2 Rear LH wheel sensor is shorted or input signal is abnormal.
MAIN RELAYDuring the actuator relay operating with OFF, when the actuator
relay turns ON. Or when the control line for the relay is shorted to
the ground.Actuator relay and cir-
cuit. Refer to BRC-101
During the actuator relay operating with ON, when the actuator
relay turns OFF, or when the control line for the relay is open.
STOP LAMP SW Stop lamp switch circuit is open.Stop lamp switch and cir-
cuit. Refer to BRC-103
PRESS SEN CIRCUIT Pressure sensor signal line is open or shorted, or pressure sen-
sor is abnormal.Pressure sensor and cir-
cuit. Refer to BRC-91
ST ANGLE SEN CIRCUIT Neutral position of steering angle sensor is dislocated, or the
steering angle sensor is abnormal.Steering angle sensor
and circuit. Refer to
BRC-93
YAW RATE SENOR Yaw rate sensor is abnormal, or the yaw rate sensor signal line is
open or shorted.Yaw rate/side Gsensor
and circuit. Refer to
BRC-95
FR LH IN ABS SOLCircuit of front LH wheel inlet solenoid valve is open or shorted,
or the control line is open or shorted to the power supply or the
ground.
Solenoid valve and cir-
cuit. Refer to BRC-96
FR LH OUT ABS SOLCircuit of front LH wheel outlet solenoid valve is open or shorted,
or the control line is open or shorted to the power supply or the
ground.
RR RH IN ABS SOLCircuit of rear RH wheel inlet solenoid valve is open or shorted,
or the control line is open or shorted to the power supply or the
ground.
RR RH OUT ABS SOLCircuit of rear RH wheel outlet solenoid valve is open or shorted,
or the control line is open or shorted to the power supply or the
ground.
FR RH IN ABS SOLCircuit of front RH wheel inlet solenoid valve is open or shorted,
or the control line is open or shorted to the power supply or the
ground.
FR RH OUT ABS SOLCircuit of front RH wheel outlet solenoid valve is open or shorted,
or the control line is open or shorted to the power supply or the
ground.
RR LH IN ABS SOLCircuit of rear LH wheel inlet solenoid valve is open or shorted, or
the control line is open or shorted to the power supply or the
ground.
RR LH OUT ABS SOLCircuit of rear LH wheel outlet solenoid valve is open or shorted,
or the control line is open or shorted to the power supply or the
ground.