NISSAN X-TRAIL 2005 Service Repair Manual

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

ABS Motor
Touch “ON”, “OFF” on the display screen and make sure ABS motor
relay is operating as shown in the table below.
Operation ON OFF
MOTOR RELAY ON OFF
ACTUATOR RLY ON ON
SFIA0593E

BRC-34
[ABS]
TROUBLE DIAGNOSIS

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-28, "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 malfunctions may be caused by a poor connection in the harness, connector, or terminal.
Move harnesses, 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 malfunction×When there is an ABS actuator and elec-
tric unit malfunction (power or ground
malfunction)
EBD malfunction×–

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

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 and electric unit (control unit) 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 and electric unit (control unit) 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 and electric unit (control unit)
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.
CAUTION:
ABS actuator and electric unit (control unit) cannot be disassembled.
3. Check the brake pad degree of wear. Refer to BR-27, "
PA D T H I C K N E S S" 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-43, "
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-28, "
Operation Pro-
cedure" .

BRC-36
[ABS]
TROUBLE DIAGNOSIS

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 (19 MPH) 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

TROUBLE DIAGNOSIS
BRC-37
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

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 or replace harness and connector that have malfunction.
6. CHECK WHEEL SENSOR
1. Replace wheel sensor that resulted in malfunction by self-diagnosis.
2. Reconnect connectors, drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute, and then
perform self-diagnosis.
Is above displayed on self-diagnosis display?
OK >> Wheel sensor has malfunction.
NG >>

Replace ABS actuator and electric unit (control unit).

Perform to self-diagnosis again, and make sure that the result shows “NO DTC IS DETECTED.
FURTHER TESTING MAY BE REQUIRED”.
SFIA2015E
Power supply circuit Signal circuit Ground circuit
WheelABS actua-
tor and
electric unit
(control
unit) har-
ness con-
nector E69Wheel sen-
sor har-
ness
connectorABS actua-
tor and
electric unit
(control
unit) har-
ness con-
nector E69Wheel sen-
sor har-
ness
connectorABS 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.

BRC-38
[ABS]
TROUBLE DIAGNOSIS

Inspection 2: ABS Actuator and Electric Unit (Control Unit) 1EFS004HC
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check self-diagnostic results.
Is above displayed on self-diagnosis display?
YES >> Replace ABS actuator and electric unit (control unit). Perform self-diagnosis again.
NO >> INSPECTION END
Inspection 3: ABS Actuator and Electric Unit (Control Unit) Power Supply and
Ground Circuit
EFS004HD
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check 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.
Self-diagnostic results
ABS CONTROLLER
Self-diagnostic results
LOW POWER VOLTAGE

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

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 circuit.
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 ENDSignalABS actuator
and electric unit
(control unit) har-
ness connector
E69GroundMeasure-
ment con-
ditionMea-
sured
value
Power
supply29 (L) —Ignition
switch ONBattery
voltage
(Approx.
12V)
Ignition
switch
OFFApprox.
0V
SFIA2019E
SignalABS actuator and
electric unit (con-
trol unit) harness
connector E69GroundMeasure-
ment con-
ditionMea-
sured
value
Ground 16 (B),30 (B) —Ignition
switch
OFFContinu-
ity
should
exist.
SFIA2020E
Self-diagnostic results
IN ABS SOL
OUT ABS SOL
MAIN RELAY (ACTUATOR RELAY)
PUMP MOTOR

BRC-40
[ABS]
TROUBLE DIAGNOSIS

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.
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), 15 (L/W) —Battery voltage
(Approx. 12V)
SFIA2021E
ABS actuator and elec-
tric unit (control unit)
harness connector E69Ground Continuity
16 (B), 30 (B) — Yes
SFIA2022E
Self-diagnostic results
EMERGENCY BRAKE

TROUBLE DIAGNOSIS
BRC-41
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Inspection 6: G Sensor SystemEFS004HH
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSIS 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) and G sensor con-
nector, and check the terminal for deformation, disconnection, looseness, and so on. If there is a malfunc-
tion, repair or replace the terminal.
2. Reconnect connector securely, and perform self-diagnosis.
OK or NG
OK >> Poor connection of connector terminal
NG >> GO TO 3.
3. CHECK CIRCUIT BETWEEN G SENSOR AND ABS ACTUATOR AND ELECTRIC UNIT
1. Turn ignition switch OFF and disconnect G sensor and ABS actuator and electric unit (control unit) con-
nectors.
2. Check continuity between G sensor harness connector M57 and ABS actuator and electric unit (control
unit) harness connector E69.
OK or NG
OK >> GO TO 4.
NG >> Circuit malfunction of G sensor. Repair harness.
Self-diagnostic results
G - SENSOR
G sensor harness
connector M57ABS actuator and
electric unit (control
unit) harness con-
nector E69Measured
value
1 (B/W) 21 (B)
Continuity
should
exist. 2 (R/L) 12 (R/L)
3 (PU/W) 10 (PU/W)
4 (SB) 25 (SB)
SFIA2024E

BRC-42
[ABS]
TROUBLE DIAGNOSIS

4. CHECK G SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between G sensor harness connector M57 termi-
nal 5 (L) and ground.
OK or NG
OK >> GO TO 5.
NG >> G sensor power supply circuit malfunction. Repair circuit.
5. CHECK G SENSOR
1. Remove G sensor from the vehicle. Refer to BRC-47, "
G SENSOR" .
2. Connect the following terminals between G sensor and connec-
tor.
3. Check voltage between the following G sensor terminals when
ignition switch turns ON and G sensor is in the following condi-
tion.Voltage : Battery voltage (Approx. 12V)
SFIA2025E
G sensor connector Harness connector M57
11 (B)
2 2 (R/L)
5 5 (L)
SFIA2026E
G sensor statusG sensor har-
ness connector
M57 terminals 5
(L) - 4 (SB)G sensor har-
ness connector
M57 terminals 5
(L) - 3 (PU/W)
Horizontal Approx. 5V Approx. 5V
Longitudinally
tilt by 20°Approx. 10V Approx. 10V
Longitudinally
tilt by 40°Approx. 5V Approx. 10V
SFIA2027E