2003 NISSAN X-TRAIL Electronic Repair Manual

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Page 953 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-85
[ESP/TCS/ABS]
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3. Touch²ABS²and²ACTIVE TEST².
4. The test item selection screen is displayed.
5. Touch necessary test item.
6. Touch²START²with

Page 954 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual BRC-86
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
7. The active test screen is displayed.
Solenoid Valve
1. Select each test items without “(ACT)” for the ABS function
active test, and with “(ACT)” for t

Page 955 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-87
[ESP/TCS/ABS]
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*: ON for 1 to 2 seconds after the touch, and then OFF
NOTE:
lIf the active test is performed with the brake pedal depressed, the peda

TROUBLE DIAGNOSIS
BRC-87
[ESP/TCS/ABS]
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*: ON for 1 to 2 seconds after the touch, and then OFF
NOTE:
lIf the active test is performed with the brake pedal depressed, the pedal stroke may be changed. This is a
normal condition.
l²TEST STOP²is displayed 6 seconds after the operation start.
lAfter²TEST STOP²is displayed, to perform the test again, repeat the step 6 of the operation procedure.
ESP OFF Indicator Lamp
To u c h²ON²and²OFF on the “VDC WARNING LAMP” screen to check that ESP OFF indicator lamp oper-
ates as follows.
NOTE:
Duringtheactivetestwhen²OFF²on the “VDC WARNING LAMP” screen is touched, all of the ESP OFF indi-
cator lamp, SLIP indicator lamp, and ABS warning lamp flash once. This is not abnormal.
Motor Relay and Actuator Relay
To u c h²ON²and²OFF²on the “ABS MOTOR” screen to check that the motor relay and the actuator relay
operate as follows.
NOTE:
lIf the active test is performed with the brake pedal depressed, the pedal stroke may be changed. This is a
normal condition.
l²TEST STOP²is displayed after 10 seconds from the operation start.
SLIP Indicator Lamp
To u c h²ON²and²OFF²on the “SLIP LAMP” screen to check that the SLIP indicator lamp operates as follows.
NOTE:
During the active test when²OFF²on the “SLIP LAMP” screen is touched, all of the ESP OFF indicator lamp,
SLIP indicator lamp, and ABS warning lamp flash once. This is not abnormal.
ABS Warning Lamp
To u c h²ON²and²OFF²on the “ABS WARNING LAMP” screen to check that the ABS warning lamp operates
as follows.
NOTE:
Duringtheactivetestwhen²OFF²on the “ABS WARNING LAMP” screen is touched, all of the ESP OFF indi-
cator lamp, SLIP indicator lamp, and ABS warning lamp flash once. This is not abnormal.
REAR SOLENOID
REAR ABS SOLNOID
(ACT)RR RH IN SOL OFF ON ON OFF OFF OFF
RR RH OUT SOL OFF OFF ON OFF OFF OFF
RR LH IN SOL OFF ON ON OFF OFF OFF
RR LH OUT SOL OFF OFF ON OFF OFF OFF OperationWithout “(ACT)” With “(ACT)”
UP KEEP DOWN UPACTUA-
TOR UPACTUA-
TO R K EE P
Operation ON OFF
VDC WARNING LAMP ON (Lamp ON) OFF (Lamp OFF)
Operation ON OFF
MOTOR RELAY ON OFF
ACTUATOR RELAY ON ON
Operation ON OFF
SLIP LAMP ON (Lamp ON) OFF (Lamp OFF)
Operation ON OFF
ABS WARNING LAMP ON (Lamp ON) OFF (Lamp OFF)

Page 956 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual BRC-88
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
For Correct and Quick Diagnosis
EFS001A8
PRECAUTIONS FOR TROUBLE DIAGNOSIS
lBefore performing the trouble diagnosis, always read theGI-3, "PRECAUTIONS"to confirm

BRC-88
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
For Correct and Quick Diagnosis
EFS001A8
PRECAUTIONS FOR TROUBLE DIAGNOSIS
lBefore performing the trouble diagnosis, always read theGI-3, "PRECAUTIONS"to confirm the general
precautions.
lAfter replacement of ESP/TCS/ABS control unit, steering angle sensor, steering parts, suspension parts,
or tires, and adjustment of alignment, always adjust the neutral position of steering angle sensor before
driving.
lWhen the ESP/TCS/ABS control unit is replaced, check that the label on the computer unit is identical
color.
lAfter completing the trouble diagnosis, always erase the malfunctioning memory.BRC-77, "Functions of
CONSULT-II"
lWhen inspection of the continuity or voltage between units is performed, check the connector terminals for
disconnection, looseness, bend, or collapse. If any malfunction is detected, repair or replace the applica-
ble part.
lIntermittent problems may be caused by a malfunction on harness, connector, or terminal. Move the har-
nesses, harness connectors, or terminals by hand to make sure that there is no contact malfunction.
lIf a circuit tester is used for the check, be careful not to forcibly extend any connector terminal.
lFor self-diagnosis, active test, and work support of ESP/TCS/ABS control unit with CONSULT-II, stop and
connect CONSULT-II and select²ABS².
lCONSULT-II self-diagnosis results are displayed without regard to occurrence timing. In some case, the
later ones (timing value is small) appear on the next screen.
lWhile the self-diagnosis results of CONSULT-II shows a malfunction, if CONSULT-II active test is per-
formed, an engine system malfunction may be indicated. In this case, start the engine to resume the nor-
mal screen.
lESP/TCS/ABS system electronically controls the brake operation and engine output. The following symp-
toms may be caused by the normal operations.
Symptom Symptom description Result
Motor operation noiseDuring ESP, TCS, or ABS operation, sometimes a faint noise can be
heard. This is a motor operation noise in the ESP/TCS/ABS actuator.
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 starts, a²click²noise may be heard from the engine
compartment. This is a normal status of the system operation check.Normal
ESP/TCS operation
(SLIP lamp ON)When the vehicle is passing through a road where the surface friction
coefficient varies or the wheel speed changes suddenly by downshifting
or depressing of the accelerator pedal fully, TCS may be activated tem-
porarily.
Normal
Cancel the ESP/TCS
function for the
inspection on a chas-
sis dynamometer. Before the speedometer inspection, turn ESP OFF switch off to cancel
the ESP/TCS function.
When the accelerator pedal is depressed on a chassis dynamometer,
the vehicle speed will not increase. This is not malfunction, because
TCS is activated by the wheel speed difference between front and rear.
The warning lamp may also illuminate to show²sensor system failure²in
this case. This is not malfunction either, because the stationary front
wheels are detected. Restart the engine, and drive the vehicle at 30 km/
h or higher to check that the warning lamp no longer illuminates.
ABS operation (Longer stop-
ping distance)The stopping distance may be longer for the vehicles with ABS when the
vehicle is driver on snowy and rough road. When driving on the road like
that, slow down the speed.Normal
Sluggish feelDepending on road circumstances, the driver may have a sluggish feel.
This is not abnormal, because the optimum traction has the highest pri-
ority (safety first) by TCS operation. Sometimes the driver has a slight
sluggish feel against the substantial accelerator pedal operation.Normal

Page 957 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-89
[ESP/TCS/ABS]
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ABS Warning Lamp, ESP OFF Indicator Lamp, SLIP Indicator Lamp ON/OFF Timing
´:ON –: Lamp OFF
´: Applicable
–: Not applicable
Bas

TROUBLE DIAGNOSIS
BRC-89
[ESP/TCS/ABS]
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ABS Warning Lamp, ESP OFF Indicator Lamp, SLIP Indicator Lamp ON/OFF Timing
´:ON –: Lamp OFF
´: Applicable
–: Not applicable
Basic InspectionEFS001A9
PRELIMINARY CHECK 1: (BRAKE FLUID LEVEL AND LEAK INSPECTION)
1. Check the fluid level in the brake reservoir tank. If the fluid level is low, refill the brake fluid.
2. Check the area around the brake piping, ESP/TCS/ABS actuator for leaks. If a leak or oozing is detected,
checkasfollows:
lIf the connections at the ESP/TCS/ABS actuator are loose, tighten the piping to the specified torque.
Then check again for leaks, and make sure that there is no fluid leak.
lIf the flare nuts at the connections and the threads of the ESP/TCS/ABS actuator are damaged, replace
the damaged parts. Then check again for leaks, and make sure that there is no fluid leak.
lIf a leak or oozing is detected on other parts than the ESP/TCS/ABS actuator connections, wipe the
applicable part with a clean cloth. Then check again for leaks, and if there is still a leak or oozing,
replace the damaged part.
lIf a leak or oozing is detected on the ESP/TCS/ABS actuator body, wipe the applicable part with a clean
cloth. Then check again for leaks, and if there is still a leak or oozing, replace the ESP/TCS/ABS actua-
tor body.
CAUTION:
Do not disassemble the actuator body.
3. Check the brake disc rotor and pads.
PRELIMINARY CHECK 2: (INSPECTION FOR LOOSE POWER SUPPLY TERMINAL)
Check the battery for looseness on the battery positive/negative terminals and ground connection. If loose-
ness is detected, tighten the piping to the specified torque. Check that the battery voltage does not drop and
the alternator is normal.
PRELIMINARY CHECK 3: (INSPECTION FOR ABS WARNING LAMP, ESP OFF INDICATOR
LAMP, AND SLIP INDICATOR LAMP)
1. Check that the ABS warning lamp is ON for Approx. 0.5 seconds when the ignition switch is turned ON. If
it does not turn on, check the ABS warning lamp and the circuit, and the combination meter.
2. Check that ESP OFF indicator lamp is ON for Approx. 0.5 seconds when the ignition switch is turned ON.
If it does not turn ON, check the ESP OFF indicator lamp and the circuit, and the combination meter.
3. Check that the SLIP indicator lamp is ON for Approx. 0.5 seconds when the ignition switch is turned ON. If
it does not turn ON, check the SLIP indicator lamp and the circuit.
Condition ABS warning lampESP OFF
indicator lampSLIP indicator lamp Remarks
When the ignition switch is
OFF––– –
After the ignition switch is
turned ON
For Approx. 0.5 seconds´´´–
Ignition switch ON
Approx. 0.5 seconds later––– –
When the ESP OFF switch
turns ON (ESP/TCS function
OFF).–´–Lamp goes off after Approx. 2
seconds when the engine re-start.
ESP/TCS/ABS
malfunction´´´–
´´–When the ESP/TCS/ABS control
unit is abnormal (power supply or
ground malfunction).
When the ESP/TCS ism
abnormal.–´´–

Page 958 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual BRC-90
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
4. With the engine running, check the ESP OFF indicator lamp turns ON and OFF when the ESP OFF
switch turns ON and OFF. If it dose not operate in accordance with

Page 959 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-91
[ESP/TCS/ABS]
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3.CHECK WHEEL SPEED SENSOR CIRCUIT
1. Disconnect connectors of the ESP/TCS/ABS control unit and
wheel speed sensors.
2. Check for cont

Page 960 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual BRC-92
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
5.SENSOR ROTOR INSPECTION
Check sensor rotor tooth for damage.
Is inspection result OK?
YES >> Check the EPS/TCS/ABS control unit connector for disconnect, loose

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