NISSAN X-TRAIL 2005 Service Repair Manual

TROUBLE DIAGNOSIS
BRC-23
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

TFWA0085E

BRC-24
[ABS]
TROUBLE DIAGNOSIS

TFWA0086E

TROUBLE DIAGNOSIS
BRC-25
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Control Unit Input/Output Signal StandardEFS004GA
REFERENCE VALUE FROM CONSULT-II
CAUTION:
The display shows the control unit calculation data, so a normal value might be displayed even in the
event the output circuit (harness) is open or short - circulated.
Note 1: Confirm tyre pressure is normal.
Note 2: ABS warning lamp ON/OFF timing
ON: For approximately 1 second after the ignition switch is turned on or when an malfunction is detected.
OFF: Approximately 1 second after the ignition switch is turned on (when system is normal).Monitor item Display ContentData monitor
Reference: Inspection
checklist
ConditionReference values
for normal opera-
tion
FR LH SENSOR
FR RH SENSOR
RR LH SENSOR
RR RH SENSORWheel speed calcu-
lated using signals
from all four wheel
sensorsVehicle stopped 0 km/h (0 MPH)
BRC-36, "
Inspection 1:
Wheel Sensor System"While driving (Note 1)Nearly matches
the speedometer
display (± 10% or
less)
DOCILE G-SEN. 1
DOCILE G-SEN. 2
(4WD model)Fore-and-aft G
detected by G sensorWhen vehicle is stopped on
level groundOFF
BRC-41, "
Inspection 6: G
Sensor System"When G sensor is tilted toward
the front with G sensor mount-
ing bolt removedON
ABS IN SOL
ABS OUT SOLOperation status of all
solenoidsWhen the actuator solenoid
operates or during a fail-safeON
BRC-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
When the actuator relay oper-
ates and the actuator solenoid
does not operateOFF
STOP LAMP SW Brake pedal operationBrake pedal depressed ON
Stop lamp switch circuit
Brake pedal not depressed OFF
MOTOR RELAYMotor and motor relay
operation statusWhen the motor relay and
motor are operatingON
BRC-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
When the motor relay and
motor are not operatingOFF
ACTUATOR RELAYActuator relay opera-
tion statusWhen the actuator relay is
operatingOFF
When the actuator relay is not
operatingON
ABS WARN LAMPABS warning lamp on
condition (Note 2)ABS warning lamp ON ONBRC-35, "
BASIC
INSPECTION 3 ABS
WARNING LAMP"ABS warning lamp OFF OFF
BATTERY VOLTBattery voltage sup-
plied to ABS actuator
and electric unit (con-
trol unit) Ignition switch ON 10 - 16VBRC-38, "
Inspection 3:
ABS Actuator and Elec-
tric Unit (Control Unit)
Power Supply and
Ground Circuit"
EBD FAIL SIG
ABS FAIL SIGFail signal statusEBD Fail
ABS FailON
EBD system
ABS system EBD normal
ABS normalOFF
EBD SIGNAL
ABS SIGNALEBD operation
ABS operationEBD active
ABS activeON
EBD not active
ABS not activeOFF

BRC-26
[ABS]
TROUBLE DIAGNOSIS

CONSULT- II FunctionsEFS004GB
CONSULT-II MAIN FUNCTION
In a diagnosis function (main function), there are “SELF-DIAG RESULTS”, “DATA MONITOR”, “CAN DIAG
SUPPORT MNTR”, “ACTIVE TEST”, “FUNCTION TEST”, “ECU PART NUMBER”.
CONSULT-II BASIC 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. Touch “START (NISSAN BASED VHCL)”.
5. Touch “ABS” in the “SELECT SYSTEM” screen.
If “ABS” is not indicated, go to GI-35, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
Diagnostic
test modeFunction Reference
SELF-DIAG
RESULTSSelf-diagnostic results can be read and erased quickly.BRC-28, "
SELF-DIAGNOSIS"
DATA MONI-
TORInput/Output data in the ABS actuator and electric unit (control unit) can be read.BRC-30, "DATA MONITOR"
CAN DIAG
SUPPORT
MNTRThe results of transmit/receive diagnosis of communication can be read. —
ACTIVE TESTDiagnostic Test Mode in which CONSULT-II drives some actuators apart from the
ABS actuator and electric unit (control unit) and also shifts some parameters in a
specified range.BRC-32, "
ACTIVE TEST"
FUNCTION
TESTConducted by CONSULT-II instead of a technician to determine whether each sys-
tem is “OK” or “NG”.—
ECU PART
NUMBERABS actuator and electric unit (control unit) part number can be read. —
SKIA3098E
SFIA1816E

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

6. Select the required diagnostic location from the “SELECT DIAG
MODE” screen.
For further information, see the CONSULT-II Operation Manual.
SFIA2435E

BRC-28
[ABS]
TROUBLE DIAGNOSIS

SELF-DIAGNOSIS
Description
If an malfunction is detected in the system, ABS warning lamp on the combination meter turn on. In this case,
perform 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 diagnostic memory.
CAUTION:
If the diagnostic 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.

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

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-36, "
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 malfunction in the actuator relay
system.BRC-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
FR LH IN ABS SOLWhen the control unit detects an malfunction in the front left inlet
solenoid system.
BRC-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
FR LH OUT ABS SOLWhen the control unit detects an malfunction in the front left out-
let solenoid system.
RR RH IN ABS SOLWhen the control unit detects an malfunction in the rear right inlet
solenoid system.
RR RH OUT ABS SOLWhen the control unit detects an malfunction in the rear right out-
let solenoid system.
FR RH IN ABS SOLWhen the control unit detects an malfunction in the front right
inlet solenoid system.
FR RH OUT ABS SOLWhen the control unit detects an malfunction in the front right out-
let solenoid system.
RR LH IN ABS SOLWhen the control unit detects an malfunction in the rear left inlet
solenoid system.
RR LH OUT ABS SOLWhen the control unit detects an malfunction in the rear left outlet
solenoid system.
LOW POWER VOLTAGEWhen the ABS actuator and electric unit power voltage is lower
than normal. BRC-38, "
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-40, "
Inspection 5:
ABS Actuator and Elec-
tric Unit (Control Unit) 2"
ABS CONTROLLERWhen there is an internal malfunction in the ABS actuator and
electric unit.BRC-38, "
Inspection 2:
ABS Actuator and Elec-
tric Unit (Control Unit) 1"

BRC-30
[ABS]
TROUBLE DIAGNOSIS

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 malfunctions are detected in several systems, including CAN communication system [U1000],
troubleshoot 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 malfunction in the CAN communication system.
BRC-43, "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-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
G - SENSOR
(4WD model)Decel G-sensor is malfunctioning, or signal line of Decel G-sen-
sor is open or shorted. BRC-41, "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]×××Wheel speed calculated by front
LH wheel sensor signal is dis-
played.
FR RH SENSOR
[(km/h]×××Wheel speed calculated by front
RH wheel sensor signal is dis-
played.
RR LH SENSOR
[km/h]×××Wheel speed calculated by Rear
LH wheel sensor signal is dis-
played.
RR RH SENSOR
[km/h]×××Wheel speed calculated by Rear
RH wheel sensor signal is dis-
played.
DECEL G-SEN 1
(ON/OFF) (4WD model)×××Decel G-sensor 1 (ON/OFF) status
is displayed.
DECEL G-SEN 2
(ON/OFF) (4WD model)×××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.

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

×: 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

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 3.
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”.
*: ON for 1 to 2 seconds after the touch, and then OFF
PBR976C
SFIA0678E
OperationABS solenoid valve
UP KEEP DOWN
FR RH SOLFR RH IN SOL OFF ON ON
FR RH OUT SOL OFF OFF ON*