2001 NISSAN X-TRAIL engine control

BRC-90
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
ABS Warning Lamp
Touch “ON” and “OFF”on the “ABS WARNING LAMP” screen to check that the ABS warning lamp operates as
follows.
NOTE:
During the active test when “OFF” on 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.
For Correct and Quick DiagnosisEFS001A8
PRECAUTIONS FOR TROUBLE DIAGNOSIS
●Before performing the trouble diagnosis, always read the GI-3, "PRECAUTIONS" to confirm the general
precautions.
●After replacement of ESP/TCS/ABS control unit, steering wheel angle sensor, steering parts, suspension
parts, or tires, and adjustment of alignment, always adjust the neutral position of steering wheel angle
sensor before driving.
●When the ESP/TCS/ABS control unit is replaced, check that the label on the computer unit is identical
color.
●After completing the trouble diagnosis, always erase the malfunctioning memory. Refer to BRC-81, "Pro-
cedure" .
●When 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.
●Intermittent 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.
●If a circuit tester is used for the check, be careful not to forcibly extend any connector terminal.
●For self-diagnosis, active test, and work support of ESP/TCS/ABS control unit with CONSULT-II, stop and
connect CONSULT-II and select “ABS”.
●CONSULT-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.
●While 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.
●ESP/TCS/ABS system electronically controls the brake operation and engine output. The following symp-
toms may be caused by the normal operations.
Operation ON OFF
ABS WARNING LAMP ON (Lamp ON) OFF (Lamp OFF)
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 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, a“click” noise may be heard from the engine
compartment. This is a normal status of the system operation check.Normal

TROUBLE DIAGNOSIS
BRC-91
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
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 actuator for leaks. If a leak or oozing is detected, check as
follows:
●If the connections at the ESP actuator are loose, tighten the piping to the specified torque. Then check
again for leaks, and make sure that there is no fluid leak.
●If the flare nuts at the connections and the threads of the ESP actuator are damaged, replace the dam-
aged parts. Then check again for leaks, and make sure that there is no fluid leak.
●If a leak or oozing is detected on other parts than the ESP 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 dam-
aged part.
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 show “sensor system failure” in
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 Symptom Symptom description Result
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.–××—

BRC-92
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
●If a leak or oozing is detected on the ESP 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 actuator 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.
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 the switch, check the ESP OFF switch
and the circuit.
5. Check that the ESP OFF indicator lamp turns OFF after Approx. 2 seconds delay when the ESP OFF
switch turned ON (The ESP/TCS system was not operated). If the ESP OFF indicator lamp does not turn
OFF in 10 seconds from the engine start, perform the self-diagnosis of ESP/TCS/ABS control unit.
Inspection 1 Wheel Sensor and CircuitEFS001AB
Inspection procedure
1. SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
Are any self-diagnosis result items above indicated?
>> GO TO 2.
2. CHECK THE CONNECTOR
Remove connectors of the wheel sensor which is malfunctioning and the ESP/TCS/ABS control unit. Check
whether the deformation of terminal, or incorporate connection of connectors. Then, connect connectors. In
addition, check if the wheel sensor cable is damaged due to friction.
Does ABS warning lamp is out when driving 30 km/h (19 MPH) for Approx. One minute?
YES >> Check is completed.
NO >> GO TO 3.
Self-diagnosis results
CONSULT-II indication item
ABS SENSOR [ABNORMAL SIGNAL]
FR RH SENSOR – 1
FR RH SENSOR – 2
FR LH SENSOR – 1
FR LH SENSOR – 2
RR RH SENSOR – 1
RR RH SENSOR – 2
RR LH SENSOR – 1
RR LH SENSOR – 2

BRC-94
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
5. SENSOR ROTOR INSPECTION
Check sensor rotor tooth for damage.
Is inspection result OK?
YES >> Check the ESP/TCS/ABS control unit connector for disconnect, loose, bent and collapse termi-
nals. Securely connect them again. Perform the ESP/TCS/ABS control unit self-diagnosis again.
NO >> Replace sensor rotor.
Inspection 2 Engine SystemEFS001AC
Inspection procedure
1. SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
Are any items other than above indicated in the self-diagnosis results?
YES >> Repair or replace affected items.
NO >> GO TO 2.
2. SELF-DIAGNOSIS RESULT CHECK 2
1. Perform the ECM self-diagnosis and repair or replace affected items, then perform the ECM self-diagno-
sis again.
2. Perform the ESP/TCS/ABS control unit self-diagnosis again.
Is inspection result OK?
YES >> Inspection End
NO >> Repair or replace affected items. Perform the self-diagnosis again.
Inspection 3 ESP/TCS/ABS Control Unit SystemEFS001AD
Inspection procedure
1. SELF-DIAGNOSIS RESULT CHECK
Check the self-diagnosis results.
Are any items other than
“CONTROLLER FAILURE” indicated in the self-diagnosis results?
YES >> Repair or replace affected items. Perform the self-diagnosis again.
NO >> Replace the ESP/TCS/ABS control unit and perform the ESP/TCS/ABS control unit self-diagno-
sis again.
Self-diagnosis results
CONSULT-II indicator item
ENGINE SYSTEM 1
ENGINE SYSTEM 2
ENGINE SYSTEM 3
ENGINE SYSTEM 4
ENGINE SYSTEM 6
Self-diagnosis results
CONSULT-II indication item
CONTROLLER FAILURE

BRC-98
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
Inspection 6 Yaw Rate Sensor and Side G sensor and the Circuit between Yaw
Rate Sensor and Side G sensor and ESP/TCS/ABS Control Unit.
EFS001AG
Inspection procedure
1. SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
CAUTION:
When the vehicle on a turn-table at an entrance of parking lot or on a moving unit, the ESP OFF indica-
tor lamp turns ON, and the self-diagnosis with CONSULT-II may indicate that the yaw rate sensor sys-
tem is malfunction. In this case, the yaw rate sensor is not malfunction. Move the vehicle from the
turn-table or other moving unit, and restart the engine. This will return the status normal.
Are
“ YAW RATE SENSOR ” and “ SIDE G-SEN CIRCUIT ” indicated in the self-diagnosis results.
>> GO TO 2.
2. SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect connectors of the yaw rate and side G sensor and
the ESP/TCS/ABS control unit.
2. Check for continuity between the ESP/TCS/ABS control unit
(vehicle-side connector B111) and the yaw rate and side G sen-
sor (vehicle-side connector B112).
Is inspection result OK?
YES >> GO TO 3.
NO >> Repair or replace the disconnected harness.
Self-diagnosis results
CONSULT-II indication item
YAW RATE SENSOR
SIDE G-SEN CIRCUIT
SFIA0916E
ESP/TCS/ABS control unit
(Vehicle-side connector B111)Yaw rate and side G-sensor
(Vehicle-side connector B112)Continuity
78 (L/B) 1 (L/B) Yes
77 (Y/B) 2 (Y/B) Yes
34 (OR) 3 (OR) Yes
79 (LG/R) 4 (LG/R) Yes
18 (GY/L) 5 (GY/L) Yes
80 (W/R) 6 (W/R) Yes

BRC-102
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
5. ACTUATOR SOLENOID INSPECTION
1. Disconnect the ESP actuator connector and ESP relay box vehicle-side connector E57.
2. Check the resistance value at the ESP actuator.
Is inspection result OK?
YES >> Perform the ESP/TCS/ABS control unit self-diagnosis again.
NO >> Replace the ESP actuator assembly.
Inspection 8 Actuator Motor, Motor Relay and CircuitEFS001AJ
Inspection procedure
1. SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
Are
“PUMP MOTOR” and “ACTUATOR RLY” (NOTE) indicated in the self-diagnosis results?
>>●GO TO 2.
NOTE:
“ACTUATOR RLY” on the CONSULT-II self-diagnosis results indicates the malfunction of the
actuator relay and circuit.
SFIA1083E
ESP Actuator
(Actuator side)ESP Relay box
(Vehicle-side connector E57)Resistance
3
40 (BR/Y: Except for LHD models
and YD ENGINE)6.0 – 11Ω
1 6.0 – 11Ω
7 6.0 – 11Ω
5 6.0 – 11Ω
15 3.0 – 5.0Ω
14 3.0 – 5.0Ω
17 3.0 – 5.0Ω
16 3.0 – 5.0Ω
26 6.0 – 11.0Ω
25 6.0 – 11.0Ω
28 3.0 – 5.0Ω
27 3.0 – 5.0Ω
Self-diagnosis results
CONSULT-II indication item
PUMP MOTOR
ACTUATOR RLY (NOTE)

TROUBLE DIAGNOSIS
BRC-103
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
2.SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect connectors for the ESP/TCS/ABS control unit and the actuator. Securely connect them again.
2. Perform the self-diagnosis again.
Are any self-diagnosis items indicated again?
YES >> GO TO 3.
NO >> Repair or replace the poorly connected connector.
3.ACTUATOR MOTOR, MOTOR RELAY POWER SUPPLY CIRCUIT INSPECTION
1. Disconnect relay box connectors.
2. Check the voltage between the vehicle-side connector E55 and body ground.
Is inspection result OK?
YES >> GO TO 4.
NO >>
●Check the fuse 50A.
●Check for continuity between the battery and the relay box terminal No. 10.
4.ACTUATOR MOTOR AND MOTOR RELAY CIRCUIT CHECK
1. Disconnect connectors for the ESP/TCS/ABS control unit and
the relay box.
2. Check for continuity between the ESP/TCS/ABS control unit,
the relay, and the actuator (vehicle-side connector E66).
* Except for LHD models and YD engine.
Is inspection result OK?
YES >> GO TO 5.
NO >> Harness malfunction between the ESP/TCS/
ABS control unit, the relay box and the actuator.
SFIA0917E
Relay box
(Vehicle-side connector E55)Body ground Voltage value
10 (W/R) – Battery voltage (approx. 12V)
ESP/TCS/ABS
control unit
(Vehicle-side
connector B111)ESP relay box
(Vehicle-side
connector E56)ESP actuator
(Vehicle-side
connector E66)Continuity
20 (R/B) 4 (R/B) — Yes
7 (G/W) 8 (G/W) — Yes
— 41 (G/Y) * 21 (G/Y) * Yes
SFIA0903E

BRC-106
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
Inspection 10 Stop Lamp Switch and Circuit
EFS001AL
Inspection procedure
1. SELF-DIAGNOSIS RESULT CHECK
Check the self-diagnosis results.
Is
“STOP LAMP SW” indicated in the self-diagnosis results?
>> GO TO 2.
2. STOP LAMP INSPECTION
1. Disconnect connectors for the stop lamp switch and the ESP/TCS/ABS control unit.
2. Securely connect them again.
3. Start the engine.
4. Repeat depressing the brake pedal carefully several times, then perform the self-diagnosis again.
Is the same self-diagnosis item indicated?
YES >> GO TO 3.
NO >> Repair or replace the poorly connected connector.
3. STOP LAMP SWITCH CIRCUIT CHECK
1. Disconnect connectors for the stop lamp switch and the ESP/
TCS/ABS control unit.
2. Check for continuity between the stop lamp switch (vehicle-side
connector M12) and the ESP/TCS/ABS control unit (vehicle-
side connector B111).
Is inspection result OK?
YES >> Perform the ESP/TCS/ABS control unit self-diagnosis again.
NO >> Harness disconnection between the ESP/TCS/ABS control unit and the stop lamp switch.
Inspection 11 ESP/TCS/ABS Control Unit Power Supply CircuitEFS001AM
Inspection procedure
1. SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
Is
“BATTERY VOLTTAGE [ABNORMAL]” indicated in the self-diagnosis results?
>> GO TO 2.
Self-diagnosis results
CONSUL-II indication item
STOP LAMP SW
SFIA0921E
ESP/TCS/ABS control unit
(Vehicle-side connector B111)STOP LAMP SW
(Vehicle-side connector M12)Continuity
48 (P) 2 (P) Yes
Self-diagnosis results
CONSUL-II indication item
BATTERY VOLTTAGE [ABNORMAL]