2003 NISSAN TEANA Power

TROUBLE DIAGNOSIS
BRC-19
[ABS]
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BRC

Note 1: After completing repairs of the shorted sensor circuit, when ignition switch is turned ON, ABS warning lamp turns on. Make sure
that ABS warning lamp turns off while driving the vehicle at 30 km/h (19 MPH) or more for approximately 1 minute according to self-diag-
nosis procedure. In addition, if wheel sensor 2 is displayed for the wheels, check the wheel sensor circuit and also check the control unit
power voltage.
Note 2: When malfunctions are detected in several systems, including the CAN communication system [U1000], perform trouble diagno-
sis on the CAN communication system.
Data MonitorBFS000D1
OPERATION PROCEDURE
1. Turn ignition switch OFF.
2. Perform “CONSULT-II Starting Procedure”. Refer to GI-34, "
CONSULT-II Start Procedure" .
3. Turn ignition switch ON.
4. At the monitor item selection screen, touch one of the items “ECU INPUT SIGNALS”, “MAIN SIGNALS” or
“SELECTION FROM MENU”.
5. Touch “START” to proceed to the data monitor screen.
DISPLAY ITEM LIST
Item (Unit)Monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN SIGNALSSELECTION
FROM MENU
FR LH SENSOR
[km/h (MPH)]×××Condition of wheel speed calculated by front
left wheel sensor signal is displayed.
FR RH SENSOR
[km/h (MPH)]×××Condition of wheel speed calculated by front
right wheel sensor signal is displayed.
RR LH SENSOR
[km/h (MPH)]×××Condition of wheel speed calculated by rear
left wheel sensor signal is displayed.
RR RH SENSOR
[km/h (MPH)]×××Condition of wheel speed calculated by rear
right wheel sensor signal is displayed.
FR RH IN SOL
(ON/OFF)—××Condition of front right wheel ABS inlet sole-
noid valve (ON/OFF) is displayed.
FR RH OUT SOL
(ON/OFF)—××Condition of front right wheel ABS outlet sole-
noid valve (ON/OFF) is displayed.
FR LH IN SOL
(ON/OFF)—××Condition of front left wheel ABS inlet solenoid
valve (ON/OFF) is displayed.
FR LH OUT SOL
(ON/OFF)—××Condition of front left wheel ABS outlet sole-
noid valve (ON/OFF) is displayed.
RR RH IN SOL
(ON/OFF)—××Condition of rear right wheel ABS inlet sole-
noid valve (ON/OFF) is displayed.
RR RH OUT SOL
(ON/OFF)—××Condition of rear right wheel ABS outlet sole-
noid valve (ON/OFF) is displayed.
RR LH IN SOL
(ON/OFF)—××Condition of rear left wheel ABS inlet solenoid
valve (ON/OFF) is displayed.
RR LH OUT SOL
(ON/OFF)—××Condition of rear left wheel ABS outlet sole-
noid valve (ON/OFF) is displayed.
EBD WARN LAMP
(ON/OFF) (Note)——×Condition of brake warning lamp (ON/OFF) is
displayed.
STOP LAMP SW
(ON/OFF)×××Condition of stop lamp switch (ON/OFF) is dis-
played.
MOTOR RELAY
(ON/OFF)—××Condition of ABS motor relay (ON/OFF) is dis-
played.
ACTUATOR RLY
(ON/OFF)—××Condition of ABS actuator relay (ON/OFF) is
displayed.
ABS WARN LAMP
(ON/OFF)—××Condition of ABS warning lamp (ON/OFF) is
displayed.

BRC-22
[ABS]
TROUBLE DIAGNOSIS

For Fast and Accurate DiagnosisBFS000D3
PRECAUTIONS FOR DIAGNOSIS

Be sure to check the procedures of “How to Perform Trouble Diagnosis” in advance. Refer to GI-4, "Gen-
eral Precautions" .

Always erase memory after completing trouble diagnosis. Refer to BRC-17, "ERASE MEMORY" .

When checking continuity and voltage between units, be sure to check for disconnection, looseness,
bend, or collapse for connector terminals. Repair or replace applicable part if any non-standard condition
is detected.

Intermittent malfunctions may be caused by a poor connection in the harness, connectors, and terminals.
Move harnesses, harness connectors, and terminals by hand to make sure all connections are solid and
undamaged.

Do not to forcibly extend any connector terminal if a circuit tester is used for the check.

The symptom shown in the table below may occur, but the system is operating normally.
Basic InspectionBFS000D4
BRAKE FLUID LEVEL, LEAKAGE AND BRAKE PAD
1. Check fluid level in the brake fluid reservoir tank. Refill the brake fluid if fluid level is low.
2. Check the area around the brake piping and ABS actuator and electric unit (control unit) for leakage. If
leakage or oozing is detected, check as follows:

If ABS actuator and electric unit (control unit) connections are loose, tighten the flare nut of the piping to
the specified torque. Check again for leakage, and make sure that there is no fluid leakage.

If the flare nuts at the connections and the threads of the actuator are damaged, replace the damaged
parts. Then check again for leakage, and make sure that there is no fluid leakage.

If leakage or oozing is detected on the parts other than actuator connections, wipe with a clean cloth
and check again. If there is still leakage or oozing, replace the damaged part.

If leakage or oozing is detected on actuator body, wipe with a clean cloth and check again. If there is
still leakage or oozing, replace ABS actuator and electric unit (control unit).
CAUTION:
ABS actuator and electric unit (control unit) cannot be disassembled.
3. Check brake pad for wear. Refer to BR-26, "
PAD WEAR INSPECTION" in “FRONT DISC BRAKE”, BR-
33, "PAD WEAR INSPECTION" in “REAR DISC BRAKE”.
POWER SUPPLY CIRCUIT TERMINAL LOOSENESS AND BATTERY
Check battery for looseness on the battery positive/negative terminals and ground connection. Also make sure
that battery voltage does not drop.
Symptom Symptom description Result
Motor operation soundThis is the operation noise of the motor in the actuator, and there may be a slight sound
during ABS operation.
Normal
Just after the engine starts, the motor operating sound may be heard. This is a normal
status of the system operation check.
System operation check
soundWhen engine starts, “click” sound may be heard from engine room. This is normal condi-
tion of system operation check.Normal
ABS operation
(Longer stopping distance)When driving on roads with a low coefficient of friction, such as snowy roads or gravel
roads, the stopping distance is sometimes longer for vehicles equipped with ABS.
Therefore, when driving on such roads, drive at a sufficiently reduced speed to be safe.Normal

TROUBLE DIAGNOSIS
BRC-23
[ABS]
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MA
B
BRC

INSPECTION OF ABS WARNING LAMP AND BRAKE WARNING LAMP
×: ON —: OFF
Note 1: The brake warning lamp turns on during parking brake operation (when switch is on) and brake fluid level sensor operation
(insufficient brake fluid).
Note 2: Turns off after engine start
1. Make sure that when the ignition switch is turned ON, the ABS warning lamp turns ON for approximately 1
second, and that the brake warning lamp turns on. If they do not turn on, perform CAN communication
system diagnosis. Refer to BRC-29, "
CAN Communication System" .
2. Check if the ABS warning lamp turns off approximately 1 second after the ignition switch is turned ON,
and if the brake warning lamp turns off after the engine is started. If they do not turn off, perform self-diag-
nosis.
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-17, "
ERASE MEM-
ORY" .
NOTE:
Brake warning lamp turns on during parking brake operation (when switch is ON) and brake fluid level
sensor operation (insufficient brake fluid).
Condition ABS warning lampBrake warning lamp
(Note 1)Remarks
Ignition switch OFF — — —
For a while after ignition switch is turned ON×× (Note 2) —
In a while after ignition switch is turned ON
(When system is normal)—× (Note 2)Turns OFF 2 seconds after ignition
switch is turned ON.
ABS error×— When there is an ABS actuator and elec-
tric unit (control unit) error (power or
ground malfunction). EBD error××

TROUBLE DIAGNOSIS FOR SYSTEM
BRC-25
[ABS]
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B
BRC

5. CHECK WHEEL SENSOR HARNESS
1. Turn ignition switch OFF and disconnect malfunctioning wheel
sensor connector E10 (FR-RH), E38 (FR-LH), C2 (RR-RH), C3
(RR-LH) and ABS actuator and electric unit (control unit) con-
nector E240.
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 POWER SUPPLY CIRCUIT
1. Disconnect malfunctioning wheel sensor connector.
2. Turn ignition switch ON and check voltage between wheel sen-
sor harness connector power supply terminal and ground.
OK or NG
OK >> Replace wheel sensor.
NG >> Replace ABS actuator and electric unit (control unit).
SFIA3323E
Power supply circuit Signal circuit Ground circuit
WheelABS actuator
and electric unit
(control unit)Wheel sensorABS actuator
and electric unit
(control unit)Wheel sensorABS actuator
and electric unit
(control unit)
(signal)ABS actuator
and electric unit
(control unit)
(ground)
Front RH 21 1 12 2 21, 12
3, 4 Front LH 23 1 27 2 23, 27
Rear RH 11 1 15 2 11, 15
Rear LH 26 1 30 2 26, 30
Power supply circuit : Continuity should exist.
Signal circuit : Continuity should exist.
Ground circuit : Continuity should not exist.
Wheel Wheel sensor Ground Voltage
Front RH
1—8 V or more Front LH
Rear RH
Rear LH
SFIA3339E

BRC-26
[ABS]
TROUBLE DIAGNOSIS FOR SYSTEM

ABS Actuator and Electric Unit (Control Unit) 1BFS000D6
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check self-diagnostic results.
Is the above display on the screen?
YES >> Replace ABS actuator and electric unit (control unit). Perform self-diagnosis again.
NO >> INSPECTION END
ABS Actuator and Electric Unit (Control Unit) Power Supply and Ground CircuitBFS000D7
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check self-diagnostic results.
Is the above display on the screen?
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. Securely reconnect connectors and perform self-diagnosis again.
OK or NG
OK >> Connector terminal contact was loose, damaged, open or shorted.
NG >> GO TO 3.
Self-diagnostic results
CONTROLLER FAILURE
Self-diagnostic results
BATTERY VOLTAGE [ABNORMAL]

TROUBLE DIAGNOSIS FOR SYSTEM
BRC-27
[ABS]
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B
BRC

3. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND
1. Turn ignition switch OFF and disconnect ABS actuator and elec-
tric unit (control unit) connector.
2. Check voltage between ABS actuator and electric unit (control
unit) harness connector E240 terminal 16 and ground with igni-
tion switch turned ON and OFF.
3. Check continuity between ABS actuator and electric unit (control
unit) harness connector E240 terminals 3, 4 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 cir-
cuit.
SFIA3324E
ABS actuator and electric unit (control unit) Ground Measurement condition Voltage
16 —Ignition switch ON Battery voltage (Approx. 12 V)
Ignition switch OFF Approx. 0 V
ABS actuator and electric unit (contorl unit) Ground Continuity
3, 4 — Yes
SFIA3325E

BRC-28
[ABS]
TROUBLE DIAGNOSIS FOR SYSTEM

ABS Actuator Relay or ABS Motor Relay Power SystemBFS000D8
INSPECTION PROCEDURE
1. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND
CIRCUIT
Check the self-diagnostic results.
Is the above display on the screen?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connectors, and
check the terminal for deformation, disconnection, looseness, and so on. If there is a malfunction, repair
or replace the terminal.
2. Securely reconnect connectors and perform self-diagnosis again.
OK or NG
OK >> Connector terminal contact was loose, damaged, open or shorted.
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 elec-
tric unit (control unit) connector.
2. For the ABS actuator relay, measure voltage between the har-
ness connector E240 terminal 2 and ground. For the ABS motor
relay, measure voltage between the harness connector E240
terminal 1 and 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 E240 terminals 3, 4 and ground.
OK or NG
OK >> Replace ABS actuator and electric unit (control unit).
NG >> Open or short in harness. Repair or replace harness.
Self-diagnostic results
IN ABS SOL
OUT ABS SOL
ACTUATOR RLY
ABS actuator and electric unit (contorl unit) Ground Voltage
1, 2 —Battery voltage
(Approx. 12 V)
SFIA3326E
ABS actuator and electric unit (contorl unit) Ground Continuity
3, 4 — Yes
SFIA3325E

SYSTEM DESCRIPTION
BRC-41
[VDC/TCS/ABS]
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MA
B
BRC

SYSTEM DESCRIPTIONPFP:00000
System DiagramBFS000DP
FunctionsBFS000DQ
VDC

In addition to the TCS/ABS function, the steering amount and brake operation amount are detected from
the steering angle sensor and brake switch, and the driving condition (amount of under-steering/over-
steering) is determined from information from the yaw rate/side/decel G sensor, vehicle speed sensor, etc.
This information is used to improve vehicle stability by controlling the braking and engine power to all four
wheels.

The SLIP indicator lamp flashes to inform the driver of VDC operation.

During VDC operation, the body and brake pedal lightly vibrate and mechanical noises may be heard.
This is normal.

ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp might turn on when the vehicle is
subject to strong shaking or large vibration, such as when the vehicle is on a turn table or a ship while
engine is running. In this case, restart engine on a normal road, and if ABS warning lamp, VDC OFF indi-
cator lamp, and SLIP indicator lamp turn off, there is no malfunction.
TCS

Speed signals for 4 wheels control engine output and transaxle conditions so that slip rate of the drive
wheels is optimum. ABS actuator and electric unit (control unit) detects wheelspin. Output from the control
unit controls brake fluid pressure to both LH and RH drive wheels while cutting fuel to the engine and clos-
ing the throttle valve to reduce engine torque when wheelspin is detected. Throttle position is continuously
controlled to ensure the appropriate engine torque at all times.

Depending on road conditions, the driver may have a sluggish feel. This is normal, because the optimum
traction has the highest priority by TCS operation.

TCS may be activated momentarily the vehicle suddenly accelerates, suddenly downshifts, or is driven on
a road with a varying surface friction coefficient.

During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.
SFIA3329E