NISSAN X-TRAIL 2003 Service Repair Manual

TROUBLE DIAGNOSIS
BRC-27
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

SELF-DIAGNOSIS
Description
If an error is detected in the system, ABS warning lamp on the combination meter turn on. In this case, per-
form self-diagnosis as follows:
Operation Procedure
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to the 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.
3. Turn ignition switch ON.
4. Start engine and drive at 30 km/h (19 MPH) or more for approximately 1 minute.
5. After stopping the vehicle, with the engine running, touch “START (NISSAN BASED VHCL)”, “ABS”,
“SELF-DIAG RESULTS” in order on the CONSULT-II screen.
CAUTION:
If “START (NISSAN BASED VHCL)” is touched immediately after starting the engine or turning on
the ignition switch, “ABS” might not be displayed in the System Selection screen. In this case,
repeat the operation from step 1.
6. The self-diagnostic results are displayed. (If necessary, the self-diagnostic results can be printed out by
touching “PRINT”.)

When “NO FAILURE” is displayed, check the ABS warning lamp.
7. Conduct the appropriate inspection from the display item list, and repair or replace the malfunctioning
component.
8. Start engine and drive at 30 km/h (19 MPH) or more for approximately 1 minute.
CAUTION:

When a wheel sensor “short-circuit” is detected, if the vehicle is not driven at 30 km/h (19 MPH)
for at least 1 minute, the ABS warning lamp will not turn off even if everything is normal.
9. Turn ignition switch OFF to prepare for erasing the memory.
10. Start the engine and touch “START (NISSAN BASED VHCL)”, “ABS”, “SELF-DIAG RESULTS”, “ERASE
MEMORY” in order on the CONSULT-II screen to erase the error memory.
CAUTION:
If the error memory is not erased, re-conduct the operation from step 4.
11. For the final inspection, drive at 30 km/h (19 MPH) or more for approximately 1 minute and confirm that
the ABS warning lamp a off.

BRC-28
[ABS]
TROUBLE DIAGNOSIS

Display Item List
Suspect Systems Malfunction detecting condition Inspection system
RR RH SENSOR-1 When the circuit in the rear RH wheel sensor is open.
BRC-35, "
Inspection 1:
Wheel Sensor Sys-
tem"(Note 1) RR LH SENSOR-1 When the circuit in the rear LH wheel sensor is open.
FR RH SENSOR-1 When the circuit in the front RH wheel sensor is open.
FR LH SENSOR-1 When the circuit in the front LH wheel sensor is open.
FR LH SENSOR-2When the circuit in the front LH wheel sensor is short-circuited.
Or when the sensor power voltage is outside the standard. When
the distance between the wheel sensor and sensor rotor is too
large and the sensor pulse cannot be recognized by the control
unit.
RR RH SENSOR-2When the circuit in the rear RH wheel sensor is short-circuited.
Or when the sensor power voltage is outside the standard. When
the distance between the wheel sensor and sensor rotor is too
large and the sensor pulse cannot be recognized by the control
unit.
FR RH SENSOR-2When the circuit in the front RH wheel sensor is short-circuited.
Or when the sensor power voltage is outside the standard. When
the distance between the wheel sensor and sensor rotor is too
large and the sensor pulse cannot be recognized by the control
unit.
RR LH SENSOR-2When the circuit in the rear LH wheel sensor is short-circuited. Or
when the sensor power voltage is outside the standard. When
the distance between the wheel sensor and sensor rotor is too
large and the sensor pulse cannot be recognized by the control
unit.
MAIN RELAYWhen the control unit detects an error in the actuator relay sys-
tem.BRC-38, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
FR LH IN ABS SOLWhen the control unit detects an error in the front left inlet sole-
noid system.
BRC-38, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
FR LH OUT ABS SOLWhen the control unit detects an error in the front left outlet sole-
noid system.
RR RH IN ABS SOLWhen the control unit detects an error in the rear right inlet sole-
noid system.
RR RH OUT ABS SOLWhen the control unit detects an error in the rear right outlet sole-
noid system.
FR RH IN ABS SOLWhen the control unit detects an error in the front right inlet sole-
noid system.
FR RH OUT ABS SOLWhen the control unit detects an error in the front right outlet
solenoid system.
RR LH IN ABS SOLWhen the control unit detects an error in the rear left inlet sole-
noid system.
RR LH OUT ABS SOLWhen the control unit detects an error in the rear left outlet sole-
noid system.
LOW POWER VOLTAGEWhen the ABS actuator and electric unit power voltage is lower
than normal. BRC-37, "
Inspection 3:
ABS Actuator and Elec-
tric Unit (Control Unit)
Power Supply and
Ground Circuit"
EMERGENCY BRAKEWhen the ABS actuator and electric unit malfunctions (pressure
increase is too much or too little).BRC-39, "
Inspection 5:
ABS Actuator and Elec-
tric Unit (Control Unit) 2"
ABS CONTROLLERWhen there is an internal error in the ABS actuator and electric
unit.BRC-37, "
Inspection 2:
ABS Actuator and Elec-
tric Unit (Control Unit) 1"

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

TROUBLE DIAGNOSIS
BRC-31
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

ACTIVE TEST
CAUTION:

Do not perform active test while driving.

Make sure to completely bleed air from the brake system.

Active test can not be performed with ABS warning lamp on.
Operation Procedure
1. Touch “ABS”, “ACTIVE TEST” in order on the CONSULT-II screen.
2. The test item selection screen is displayed.
3. Touch necessary test item.
4. With the “MAIN SIGNALS” display shown in reverse, touch “START”.
5. The Active Test screen will be displayed, so conduct the following test.
NOTE:

When the active test is conducted while depressing pedal, pedal depression amount will change, but
this is normal.

Approximately 10 seconds after the operation is begun, “TEST STOP” will be displayed.

To conduct a retest after “TEST STOP” is displayed, touch “BACK” and conduct the from the step 6.
Test Item
Solenoid valve
CAUTION:
The example shown is for the front right wheel. The procedure for the other wheels is the same as
given below.
1. For ABS solenoid valve, touch “UP”, “KEEP”, and “DOWN”.Then
use screen monitor to check that solenoid valve operates as
shown in Solenoid Valve Operation Chart. Refer to “Solenoid
Valve Operation Chart”.
PBR976C
SFIA0678E
OperationABS solenoid valve
UP KEEP DOWN
FR RH SOLFR RH IN SOL OFF ON ON
FR RH OUT SOL OFF OFF ON*
FR LH SOLFR LH IN SOL OFF ON ON
FR LH OUT SOL OFF OFF ON*
RR RH SOLRR RH IN SOL OFF ON ON
RR RH OUT SOL OFF OFF ON*

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

TROUBLE DIAGNOSIS
BRC-33
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Correct and Quick DiagnosisEFS004GC
DIAGNOSIS PRECAUTIONS

Before performing the trouble diagnosis, always read the general information (GI) to confirm the general
precautions. Refer to GI-4, "
General Precautions" .

After completing service, always erase the self-diagnosis results. Refer to BRC-27, "Operation Proce-
dure" .

When inspection of the continuity or voltage between units is performed, check connector terminals for
disconnection, looseness, bend, or collapse. If any non-standard condition is detected, repair or replace
applicable part.

Intermittent errors may be caused by a poor connection in the harness, connector, or terminal. Move har-
nesses, harness connectors, or terminals by hand to make sure all connections are solid and undamaged.

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

While a phenomena like those shown in the following table may occur, this is not malfunction because the
system is working normally.
ON and OFF Timing for ABS Warning Lamp
×: ON –: OFF Symptom Symptom description Result
Motor operation noiseThis is the sound of the motor operating inside ABS actuator, and there
may be some low sounds while the ABS is operating.
Normal
Just after the engine starts, the motor operating noise may be heard.
This is a normal status of the system operation check.
System operation check
noiseWhen the engine is started, you may barely be able to hear a slight
thudding sound from the engine room, but this sound is made by the
system operation check and is normal.Normal
ABS operation (longer stop-
ping distance)Stopping distance may be longer for vehicles with ABS when the vehicle
drives on rough or snow-covered roads. Use lower speeds when driving
on these kinds of roads.Normal
Condition ABS warning lamp Remarks
Ignition switch OFF – —
For approximately “1” second after igni-
tion switch ON×—
After approximately “1” second after igni-
tion switch ON. (When system is normal)– Turns off 1 second after engine start
ABS error×When there is an ABS actuator and elec-
tric unit error (power or ground error)
EBD error×–

BRC-34
[ABS]
TROUBLE DIAGNOSIS

Basic InspectionEFS004GD
BASIC INSPECTION 1 BRAKE FLUID AMOUNT, LEAKS, AND BRAKE PADS INSPECTION
1. Check fluid level in the brake reservoir tank. If fluid level is low, refill the brake fluid.
2. Check the brake piping and around the ABS actuator for leaks. If there is leaking or oozing fluid, check the
following items.

If ABS actuator connection is loose, tighten the piping to the specified torque and re-conduct the leak
inspection to make sure there are no leaks.

If there is damage to the connection flare nut or ABS actuator screw, replace the damaged part and re-
conduct the leak inspection to make sure there are no leaks.

When there is fluid leaking or oozing from a part other than ABS actuator connection, if the fluid is just
oozing out, use a clean cloth to wipe off the oozing fluid and re-check for leaks. If fluid is still oozing out,
replace the damaged part.

When there is fluid leaking or oozing at ABS actuator, if the fluid is just oozing out, use a clean cloth to
wipe off the oozing fluid and re-check for leaks. If fluid is still oozing out, replace ABS actuator body.
CAUTION:
ABS actuator body cannot be disassembled.
3. Check the brake pad degree of wear. Refer to BR-27, "
PAD THICKNESS" in “Front Disc Brake” and BR-
32, "PAD WEAR INSPECTION" in “Rear Disc Brake”.
BASIC INSPECTION 2 POWER SYSTEM TERMINAL LOOSENESS AND BATTERY INSPECTION
Make sure the battery positive cable, negative cable and ground connection are not loose. In addition, check
the battery voltage to make sure it has not dropped.
BASIC INSPECTION 3 ABS WARNING LAMP
1. Make sure that when the ignition switch is turned ON, the ABS warning lamp turns on for approximately 1
second. If they do not turn on, perform CAN communication system diagnosis. Refer to BRC-42, "
Inspec-
tion 7: CAN Communication System" .
2. Check if the ABS warning lamp turns off approximately 1 second after the ignition switch is turned ON, If it
do not turn off, perform self-diagnosis.
3. if ABS warning lamp has not turned off 10 seconds after the engine has been started, perform self-diagno-
sis of the ABS actuator and electric unit (control unit).
4. Always erase the self-diagnostic results after completing self-diagnosis. Refer to BRC-27, "
Operation Pro-
cedure" .

TROUBLE DIAGNOSIS
BRC-35
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Inspection 1: Wheel Sensor SystemEFS004HB
INSPECTION PROCEDURE
Check each part according to CONSULT-II self-diagnostic results, and then identify the parts to be replaced.
CAUTION:
Do not check between wheel sensor terminals.
1. CHECK TYRE
Check air pressure, wear and size.
Are air pressure, wear and size within standard?
YES >> GO TO 2.
NO >> Adjust air pressure, or replace tyre.
2. CHECK SENSOR AND SENSOR ROTOR

Check sensor and sensor rotor.

Check sensor rotor rubber for damage.

Check sensor for disconnection or looseness.
OK or NG
OK >> GO TO 3.
NG >> Repair sensor mount or replace sensor rotor.
3. CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnostic results.
Is above displayed on self-diagnosis displayed?
YES >> GO TO 4.
NO >> INSPECTION END
4. CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect connector between ABS actuator and electric unit (control unit) and
malfunctioning wheel sensor, and check for deformation, disconnection and looseness. Repair or replace
if necessary.
2. Reconnect connectors, drive vehicle at 30 km/h or more for approximately 1 minute, and then perform
self-diagnosis.
OK or NG
OK >> Poor connection of connector terminal
NG >> GO TO 5.
Self-diagnosis results
FR RH SENSOR-1,-2
FR LH SENSOR-1,-2
RR RH SENSOR-1,-2
RR LH SENSOR-1,-2
SFIA0625E

BRC-36
[ABS]
TROUBLE DIAGNOSIS

5. CHECK WHEEL SENSOR HARNESS
1. Turn ignition switch OFF and disconnect malfunctioning wheel
sensor connector and ABS actuator and electric unit (control
unit) connector.
2. Check continuity between terminals. (Also check continuity
when the steering wheel is turned right and left and when the
sensor harness inside the wheel house is moved.)
OK or NG
OK >> GO TO 6.
NG >> Repair harness and connector between ABS actuator and electric unit (control unit) and wheel
sensor.
6. CHECK WHEEL SENSOR POWER SUPPLY CIRCUIT
1. Connect wheel sensor and ABS actuator and electric unit (con-
trol unit) connectors.
2. Turn ignition switch ON and check voltage between power sup-
ply terminal and ground.
OK or NG
OK >> Replace wheel sensor.
NG >> Replace ABS actuator and electric unit (control unit).
SFIA2015E
Power supply circuit Signal circuit Ground circuit
WheelABS actuator
and electric unit
(control unit)
harness con-
nector E69Wheel sensor
harness con-
nectorABS actuator
and electric unit
(control unit)
harness con-
nector E69Wheel sensor
harness con-
nectorABS actuator and
electric unit (con-
trol unit) harness
connector E69
(Signal)Ground
Front RH (E17) 24 (W) 1 (W) 9 (B) 2 (B) 9 (B), 24 (W) —
Front LH (E59) 22 (L/W) 1 (L/W) 7 (L/Y) 2 (L/Y) 7 (L/Y), 22 (L/W) —
Rear RH (B130) 28 (B/W) 1 (B/W) 13 (L/R) 2 (L/R) 13 (L/R), 28 (B/W) —
Rear LH (B126) 26 (BR) 1 (BR) 11 (BR/W) 2 (BR/W) 11 (BR/W), 26 (BR) —
Power supply circuit : Continuity should exist.
Signal circuit : Continuity should exist.
Ground circuit : Continuity should not exist.
Vo l ta g e
Front RH 1 (W) - Ground : 8V or more
Front LH 1 (L/W) - Ground : 8V or more
Rear RH 1 (B/W) - Ground : 8V or more
Rear LH 1 (BR) - Ground : 8V or more
SFIA2016E