2005 NISSAN X-TRAIL brake sensor

BRC-94
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

2. SELF-DIAGNOSTIC RESULT CHECK 2
1. Disconnect connectors of pressure sensor and ESP/TCS/ABS control unit, and connect them again cor-
rectly.
2. Perform ESP/TCS/ABS control unit self-diagnosis again.
Is inspection result OK?
YES >> Repair or replace the poorly connected connector, then perform the self-diagnosis again.
NO >> GO TO 3.
3. PRESSURE SENSOR CIRCUIT INSPECTION
1. Disconnect connectors of pressure sensor and ESP/TCS/
ABS control unit.
2. Check for continuity between ESP/TCS/ABS control unit and
pressure sensor (harness connector E67).
Is inspection result OK?
YES >> GO TO 4.
NO >> Repair or replace the disconnected harness.
4. PRESSURE SENSOR INSPECTION
Check the “PRESS SENSOR” value in “DATA MONITOR”.
Is inspection result OK?
YES >> Perform ESP/TCS/ABS control unit self-diagnosis again.
NO >> Pressure sensor malfunction. Replace ESP actuator (with the pressure sensor).
SFIA2192E
ESP/TCS/ABS control unit
(harness connector E122)Pressure sensor
(ESP actuator harness connector E67)Continuity
69 (P/L) 30 (P/L)
Ye s 68 (L/OR) 31 (L/OR)
67 (G/B) 32 (G/B)
Condition PRESS SENSOR (Data monitor)
Brake pedal depressed Positive value
Brake pedal released Approx. 0 bar

TROUBLE DIAGNOSIS
BRC-107
[ESP/TCS/ABS]
C
D
E
G
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MA
B
BRC

5. ESP/TCS/ABS CONTROL UNIT POWER SUPPLY CIRCUIT INSPECTION 2
1. Check the fuse 10A.
2. Check for continuity between the battery positive terminal and
ESP/TCS/ABS control unit.
Is inspection result OK?
YES >> Check battery for a loose terminal and low voltage or malfunction.
NO >>

Replace the fuse 10A.

Harness disconnection
Inspection 12 When “EMERGENCY BRAKE” is indicated in the Self-Diagnostic
Results
EFS005WH
INSPECTION PROCEDURE
1. SELF-DIAGNOSTIC RESULT CHECK
Check the self-diagnostic results.
When any items other than “EMERGENCY BRAKE” is displayed in the self-diagnosis results, follow the
instructions below.
CAUTION:
“EMERGENCY BRAKE” is indicated when the control unit itself is detected internal malfunction. If this
display item was indicated, replace the control unit.
Is
“EMERGENCY BRAKE” is indicated in the self-diagnosis results?
YES >> Replace ESP/TCS/ABS control unit, and perform the self-diagnosis again.
NO >> INSPECTION END
Inspection 13 When “ST ANG SEN SIGNAL” is Indicated in the Self-Diagnostic
Results
EFS005WI
INSPECTION PROCEDURE
1. SELF-DIAGNOSTIC RESULT CHECK 1
Check the self-diagnostic results.
When any items other than
“ST ANGLE SEN SIGNAL” is displayed in the self-diagnosis results:
YES >> Check and repair the applicable items. Perform the self-diagnosis again.
NO >> Perform the steering angle sensor neutral position adjustment. GO TO 2.
SFIA2188E
ESP/TCS/ABS control unit
(harness connector E122)Battery terminal Continuity
1 (G/R) positive Yes
Self-diagnostic results
EMERGENCY BRAKE
Self-diagnostic results
ST ANGLE SEN SIGNAL

BRC-108
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

2. SELF-DIAGNOSTIC RESULT CHECK 2
Turn ignition switch OFF, and ON to erase the self-diagnosis results. And perform the ESP/TCS/ABS control
unit self-diagnosis again.
Is the same self-diagnosis item indicated again?
YES >> After replacing spiral cable (with the steering angle sensor), perform the neutral position adjust-
ment. Then conduct the self-diagnosis again.
NO >> INSPECTION END
Inspection 14 Brake Fluid Level of Reservoir Tank, Communication Circuit
between ESP/TCS/ABS Control Unit and Brake Fluid Level Warning Switch
EFS005WJ
INSPECTION PROCEDURE
1. SELF-DIAGNOSTIC RESULT CHECK 1
Check the self-diagnostic results.
Does the brake warning lamp turn on?
YES >> Check the pad for wear. Check the brake fluid for leakage.
NO >> GO TO 2.
2. SELF-DIAGNOSTIC RESULT CHECK 2
1. Disconnect connectors for the brake fluid level switch and ESP/TCS/ABS control unit.
2. Securely connect connectors. Perform the ESP/TCS/ABS control unit self-diagnosis again.
Is the same self-diagnosis item indicated again?
YES >> GO TO 3.
NO >> Poor connection of connector. Repair or replace the poorly connected connector.
3. CIRCUIT CHECK BETWEEN BRAKE FLUID LEVEL WARNING SWITCH AND ESP/TCS/ABS CON-
TROL UNIT
1. Disconnect connectors for brake fluid level switch and ESP/
TCS/ABS control unit.
2. Check for the continuity between the brake fluid level switch and the ESP/TCS/ABS control unit.
Is inspection result OK?
YES >> Perform the ESP/TCS/ABS control unit self-diagnosis again.
NO >> Repair or replace the disconnected harness.
Self-diagnostic results
BR FLUID LEVER LOW
SFIA2196E
ESP/TCS/ABS control unit
(harness connector E122)Brake fluid level switch
(harness connector E19)Continuity
40 (Y/B) 1 (Y/B) Yes

BRC-112
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

Actuator operation check
1. Connect 9 and 10 terminals of actuator to 40 and 41 terminals of
relay box.
2. Measure the motor voltage (No.4 terminal to body earth) with
oscilloscope. Then check the motor reverse voltage occasioned
time.
The motor reverse voltage occasioned time is more than 0.1
sec.
CAUTION:

Perform checking of motor relay unit. Then confirm that
relay functions.

Driving actuator motor is with in 4 sec. to prevent heating
up.

Standard condition of the motor reverse voltage occa-
sioned time is: Battery voltage is 12V. Temperature 20°.
when the battery voltage or temperature is lower than the
standard, the motor reverse voltage occasioned time
becomes slightly shorter.
Symptom 1: ABS Works FrequentlyEFS005WM
1. CHECK START
Check longitudinal brake force distribution using a brake tester.
OK or NG
OK >> GO TO 2.
NG >> Check brake system.
2. CHECK FRONT AND REAR AXLE
Check to make sure that there is no excessive play in the front and rear axles. Refer to Front: FAX-7, "
On-
Vehicle Inspection" , Rear: RAX-6, "WHEEL BEARING INSPECTION" (2WD), RAX-10, "REAR WHEEL
BEARING" (4WD).
OK or NG
OK >> GO TO 3.
NG >> Repair.
3. CHECK WHEEL SENSOR AND SENSOR ROTOR
Check wheel sensor and sensor rotor for the following.

Sensor installation for damage

Sensor rotor installation for damage

Sensor connector engagement

Sensor harness
OK or NG
OK >> GO TO 4.
NG >>

Replace wheel sensor or sensor rotor.

Repair harness.
SFIA1824E

TROUBLE DIAGNOSIS
BRC-113
[ESP/TCS/ABS]
C
D
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G
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MA
B
BRC

4. CHECK ABS WARNING LAMP DISPLAY
Make sure that the warning lamp turns off approximately 2 second after the key switch is turned on or when
driving.
OK or NG
OK >> Normal
NG >> Perform self-diagnosis. Refer to BRC-81, "
SELF-DIAGNOSIS" .
Symptom 2: Unexpected Pedal ReactionEFS005WN
1. CHECK BRAKE PEDAL STROKE
Check brake pedal stroke. Refer to BR-6, "
On-Vehicle Inspection and Adjustment" .
Is the stroke too large?
YES >>
Bleed air from the brake piping. Refer to BR-9, "Bleeding Brake System" .

Check brake pedal, brake booster, and master cylinder for mount play, looseness, brake sys-
tem fluid leakage, etc. Repair if necessary. Refer to Brake pedal: BR-6, "
BRAKE PEDAL" ,
brake booster and master cylinder: BR-23, "
BRAKE BOOSTER" .
NO >> GO TO 2.
2. PERFORMANCE CHECK
Disconnect ESP/TCS/ABS control unit connector to deactivate ABS. Check if braking force is normal in this
condition. Connect connector after inspection.
OK or NG
OK >> GO TO 3. Wheel Sensor Inspection in Refer to BRC-91, "Inspection 1 Wheel Sensor System" .
NG >> Check brake system.
Symptom 3: Longer Stopping DistanceEFS005WO
CAUTION:
The stopping distance on slippery road surfaces might be longer with the ABS operating than when
the ABS is not operating.
1. PERFORMANCE CHECK
Turn ignition switch OFF. Disconnect ESP/TCS/ABS control unit connector to deactivate ABS. In this condi-
tion, check stopping distance. After inspection, connect connector.
OK or NG
OK >> GO TO BRC-112, "Symptom 1: ABS Works Frequently" .
NG >>

Bleed air from the brake piping. Refer to BR-9, "Bleeding Brake System" .

Check brake system.
Symptom 4: ABS Does Not WorkEFS005WP
CAUTION:
ABS does not operate when speed is 10 km/h or lower.
1. CHECK ABS WARNING LAMP DISPLAY
Make sure that the warning lamp turns off approximately 2 second after the key switch is turned on or when
driving.
OK or NG
OK >> GO TO 3. Check wheel sensor and sensor rotor in Refer to BRC-91, "Inspection 1 Wheel Sensor
System" .
NG >> Perform self-diagnosis. Refer to BRC-81, "
SELF-DIAGNOSIS" .
Symptom 5: Pedal Vibration and ABS Operation NoiseEFS005WQ
CAUTION:
Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly
depressed (just place a foot on it). However, this is normal.

DI-6
COMBINATION METERS

–In a case of less then 3.5 hours after turning ignition switch OFF, temperature at the time of turning ignition
switch off is indicated.

In a case that temperature detected by ambient sensor is lower than indicated temperature before turning
ignition switch OFF.
–Temperature detected by ambient sensor is indicated when turning ignition switch ON.
Indication During Running
Though temperature detected by ambient sensor temporarily changed, indicating temperature continentally
indicates.

In a case that temperature detected by ambient sensor is higher than indicated temperature.
–If vehicle speed is more than 20 km/h (13 MPH), elevation of indicating temperature is limited according to
the speed until temperature detected by ambient sensor is indicated.
NOTE:
Vehicle speed 20 km/h (13 MPH): 256 sec., 25 km/h (16 MPH): 238 sec., 35 km/h (22 MPH): 200 sec., 50
km/h (31 MPH): 144 sec., 65 km/h (40 MPH): 88 sec., more than 80 km/h (50 MPH): 32 sec.
–If vehicle speed is more than 20 km/h (13 MPH), and that temperature detected by ambient sensor
becomes 8 °C (46 °F) more than indicating temperature, indicating temperature will be elevated unit the
degree becomes same as temperature detected by ambient sensor with limiting elevation of indicating
temperature 1 °C par a minute.
–If vehicle speed is less than 20 km/h (13 MPH), indicating temperature is continually kept.

In a case that temperature detected by ambient sensor is lower than indicated temperature.
–Temperature detected by ambient sensor is indicated during running.
CAN CommunicationEKS00EH0
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 UnitEKS00OSR
Body type Wagon
Axle 4WD 2WD
Engine YD22DDTi QR20DE/QR25DE YD22DDTi QR25DE QR20DE YD22DDTi
Transmission M/T A/T M/T A/T M/T
Brake control ABS ESP ABS ESP
CAN system type 1 2 3 4 5 6 7 8 9

COMBINATION METERS
DI-9
C
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F
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B
DI

TYPE 4/TYPE 5
System diagram
Input/output signal chart
T: Transmit R: Receive ASCD SET lamp signal TR
ASCD CRUISE lamp signal TR Signals ECM TCMABS actuator
and electric unit
(control unit)4WD control
unitCombination
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
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

DI-10
COMBINATION METERS

*1: YD engine models only
*2: QR engine models only
TYPE 6
System diagram
Input/output signal chart
T: Transmit R: Receive
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
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