ECU NISSAN TEANA 2003 Repair Manual

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

CAN Communication SystemBFS000DB
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connector, and check
terminal for deformation, disconnection, looseness, and so on. If there is a malfunction, repair or replace
the terminal.
2. Connect connectors securely and perform self-diagnosis again.
Is above displayed on self-diagnosis display?
YES >> Print out the self-diagnostic results and refer to LAN-49, "CAN System Specification Chart" .
NO >> Connector terminal connector is loose, damaged, open or shorted.
Self-diagnostic results
CAN COMM CIRCUIT

WHEEL SENSORS
BRC-33
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

WHEEL SENSORSPFP:47910
Removal and InstallationBFS000DH
COMPONENTS
REMOVAL
Be careful of the following:
CAUTION:
When removing the wheel sensor, do not rotate it if possible, and do not forcibly pull the wheel sensor
harness.
INSTALLATION
Note the following, and tighten bolts to the specified torque.

Check the inside of the wheel sensor mounting hole for foreign materials, the rotor surface for iron chips
and other foreign materials. Clean both the wheel sensor mounting hole and the rotor surface before
installation. Replace the wheel sensor if there is any non-standard condition.

Completely push in rubber clamp of strut bracket and body bracket until they lock when installing front
wheel sensor so that the wheel sensor harness will not be twisted. Install grommet groove onto bracket
with yellow line on the harness facing bracket opening (mounting hole). There should be no twists in the
harness when installed.

When installing the rear sensor, securely install the harness mount of the rear suspension member so that
the wheel sensor harness is not twisted. In addition, there should be no twists in the harness when
installed.
SFIA2091E

BRC-36
[ABS]
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)

REMOVAL
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Loosen brake tube flare nuts, then remove brake tubes from ABS actuator and electric unit (control unit).
3. Remove ABS actuator and electric unit (control unit) mounting bolts.
4. Remove ABS actuator and electric unit (control unit) from vehicle.
CAUTION:
Be careful of the following when removing ABS actuator and electric unit (control unit).

If the part number on the part number label (pasted on actuator upper surface) is the same, ABS
actuator and electric unit (control unit) cannot be used on another vehicle.
If it is used on another vehicle, ABS warning lamp, may turn ON or ABS may not operate normally.
When replacing ABS actuator and electric unit (control unit), must use new service parts.

Before servicing, disconnect both battery cables.

To remove brake tube, use a flare nut torque wrench to prevent flare nuts and brake tube from
being damaged. To install, use a flare nut torque wrench (commercial service tool) and tighten
with the specified torque.

Do not apply excessive impact to actuator, such as dropping it.

Do not remove and install ABS actuator and electric unit (control unit) by holding harness.
INSTALLATION
Install is in the reverse order of the removal.
CAUTION:
Be careful of the following when installing ABS actuator and electric unit (control unit).

Tighten the mounting bolts and nuts with the specified torque.

After the work, bleed air from brake piping. Refer to BR-10, "Bleeding Brake System" .

After installing body harness connector in the actuator, make sure connector is securely locked.

TROUBLE DIAGNOSIS
BRC-57
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Note 3: ON/OFF timing of ABS warning lamp
ON: For a while after ignition switch is turned ON, or when a malfunction is detected.
OFF: In a while after ignition switch is turned ON (when the system is in normal operation).
Note 4: ON/OFF timing of VDC OFF indicator lamp
ON: For a while after ignition switch is turned ON, or when a malfunction is detected, or VDC OFF switch is ON.
OFF: In a while after ignition switch is turned ON (when the system is in normal operation) and VDC OFF switch is OFF.
Note 5: ON/OFF timing of SLIP indicator lamp
ON: For a while after ignition switch is turned ON, or when a malfunction is detected.
OFF: In a while after ignition switch is turned ON (when the system is in normal operation).
Blink: When the VDC/TCS function is operating during driving.
CONSULT-II FunctionsBFS000E2
CONSULT-II MAIN FUNCTION
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II SETTING PROCEDURE
Refer to GI-34, "CONSULT-II Start Procedure" .
Diagnostic test mode Function Reference
WORK SUPPORTThis mode enables a technician to adjust some devices faster and more accu-
rately by following the indications on CONSULT-II.BRC-40, "
Adjustment of
Steering Angle Sensor
Neutral Position"
SELF-DIAG RESULTS Self-diagnostic results can be read and erased quickly.BRC-58, "Self-Diagno-
sis"
DATA MONITOR Input/Output data in the ABS actuator and electric unit (control unit) can be read.BRC-61, "Data Monitor"
CAN DIAG SUPPORT
MNTRThe results of transmit / receive diagnostic of CAN communication can be read.LAN-44, "CAN Diagnos-
tic Support Monitor"
ACTIVE TESTDiagnostic Test Mode in 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-63, "Active Test"
FUNCTION TESTPerformed by CONSULT-II instead of a technician to determine whether each
system is “OK” or “NG”.—
ECU PART NUMBER ABS actuator and electric unit (control unit) part number can be read. —

TROUBLE DIAGNOSIS
BRC-61
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

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 MonitorBFS000E4
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 sensor calculated by rear right
wheel sensor signal is displayed.
DECEL G SEN
(G)×××Condition of decel G detected by the decel G sensor
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 solenoid valve
(ON/OFF) is displayed.
RR RH IN SOL
(ON/OFF)—××Condition of rear right wheel ABS inlet solenoid valve
(ON/OFF) is displayed.
RR RH OUT SOL
(ON/OFF)—××Condition of rear right wheel ABS outlet solenoid
valve (ON/OFF) is displayed.
FR RH IN SOL
(ON/OFF)—××Condition of front right wheel ABS inlet solenoid valve
(ON/OFF) is displayed.
FR RH OUT SOL
(ON/OFF)—××Condition of front right wheel ABS outlet solenoid
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 solenoid valve
(ON/OFF) is displayed.
EBD WARN LAMP
(ON/OFF) (Note)——×Condition of brake warning lamp (ON/OFF) is dis-
played.
STOP LAMP SW
(ON/OFF)×××Condition of stop lamp switch (ON/OFF) is displayed.
MOTOR RELAY
(ON/OFF)—××Condition of ABS motor relay (ON/OFF) is displayed.
ACTUATOR RLY
(ON/OFF)—××Condition of ABS actuator relay (ON/OFF) is dis-
played.
ABS WARN LAMP
(ON/OFF)—××Condition of ABS warning lamp (ON/OFF) is dis-
played.

BRC-62
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS

OFF LAMP
(ON/OFF)—××Condition of VDC OFF indicator lamp (ON/OFF) is dis-
played.
OFF SW
(ON/OFF)×××Condition of VDC OFF switch (ON/OFF) is displayed.
SLIP LAMP
(ON/OFF)—××Condition of SLIP indicator lamp (ON/OFF) is dis-
played.
BATTERY VOLT
(V)×××Condition of the voltage supplied to the VDC/TCS/
ABS control unit is displayed.
GEAR×××The gear position determined from the PNP switch
signal is displayed.
YAW RATE SEN
(d/s)×××Yaw rate detected by yaw rate sensor is displayed.
STOP LAMP SW2
(ON/OFF)——×Condition of brake switch (ON/OFF) is displayed.
ACCEL POS SIG
(%)×—×The accelerator openness condition determined from
the CAN communication signal is displayed.
N POSI SIG
(ON/OFF)——×Shift position determined by the A/T PNP switch sig-
nal.
P POSI SIG
(ON/OFF)——×Shift position determined by the A/T PNP switch sig-
nal.
CV 1
(ON/OFF)——×Cut valve 1 operation condition.
CV 2
(ON/OFF)——×Cut valve 2 operation condition.
SV 1
(ON/OFF)——×Suction valve 1 operation condition.
SV 2
(ON/OFF)——×Suction valve 2 operation condition.
SIDE G SEN
(m/s
2 )×— — Side G detected by side G sensor is displayed.
STR ANGLE SIG
(°)×—×The steering angle detected by the steering angle
sensor is displayed.
ENGINE SPEED
(rpm)×××Engine speed judged by CAN communication signal is
displayed.
EBD SIGNAL
(ON/OFF)——×Condition of EBD operation (ON/OFF) is displayed.
ABS SIGNAL
(ON/OFF)——×Condition of ABS operation (ON/OFF) is displayed.
TCS SIGNAL
(ON/OFF)——×Condition of TCS operation (ON/OFF) is displayed.
VDC SIGNAL
(ON/OFF)——×Condition of VDC operation (ON/OFF) is displayed.
EBD FAIL SIG
(ON/OFF)——×Condition of EBD fail-safe signal (ON/OFF) is dis-
played.
ABS FAIL SIG
(ON/OFF)——×Condition of ABS fail-safe signal (ON/OFF) is dis-
played.
TCS FAIL SIG
(ON/OFF)——×Condition of TCS fail-safe signal (ON/OFF) is dis-
played.
VDC FAIL SIG
(ON/OFF)——×Condition of VDC fail-safe signal (ON/OFF) is dis-
played. Item (Unit)Monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN SIGNALSSELECTION
FROM MENU

TROUBLE DIAGNOSIS
BRC-63
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

×: Applicable
−: Not applicable
Note: Brake warning lamp can be used for EBD warning lamp.
Active TestBFS000E5
CAUTION:

Do not perform active test while driving vehicle.

Make sure to completely bleed air from brake system.

Active test cannot be performed while ABS warning lamp is turned on due to the ABS malfunction-
ing.

ABS and brake warning lamps are on during active test.
OPERATION PROCEDURE
1. Preform “CONSULT-II Starting Procedure”. Refer to GI-34, "CONSULT-II Start Procedure" .
2. Touch “ACTIVE TEST” in order on the CONSULT-II screen.
CAUTION:
When “START (NISSAN BASED VHCL)” is touched immediately after starting engine or turning on
ignition switch, “ABS” might not be displayed in the system selection screen. In this case, repeat
the operation from step 1.
3. The “SELECT TEST ITEM” is displayed.
4. Touch necessary test item.
5. While “MAIN SIGNALS” indication is inverted, touch “START”.
6. “ACTIVE TEST” screen will be displayed, so perform the following test.

Solenoid valve

ABS motor
NOTE:

When active test is performed while depressing the pedal, the pedal depression amount will change.
This is normal.

“TEST IS STOPPED” is displayed 10 seconds after operation start.

After “TEST IS STOPPED” is displayed, to perform test again, touch “BACK” and repeat step 3.
CRANKING SIG
(ON/OFF)——×Condition of key switch start position signal input is
displayed.
FLUID LEV SW
(ON/OFF)×—×Condition of brake fluid level sensor (ON/OFF) is dis-
played. Item (Unit)Monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN SIGNALSSELECTION
FROM MENU
PFIA0301E

TROUBLE DIAGNOSIS FOR SYSTEM
BRC-71
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Steering Angle Sensor SystemBFS000EB
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Is above displayed on self-diagnosis display?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect ABS actuator and electric unit (control unit) connector and steering
angle sensor connector, and check the terminal for deformation, disconnection, looseness, and so on.
Repair or replace the malfunctioning part if there are.
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 STEERING ANGLE SENSOR HARNESS
1. Check CAN communication system. Refer to BRC-81, "
CAN Communication System" .
2. Turn ignition switch OFF and disconnect steering angle sensor connector M26.
3. Check continuity between steering angle sensor harness con-
nector and ground.
4. Check voltage between steering angle sensor harness connec-
tor and ground.
OK or NG
OK >> GO TO 4.
NG >> Open or short in harness. Repair or replace harness.
Self-diagnostic results
ST ANGLE SIG CIRCUIT
Steering angle sensor Ground Continuity
2—Yes
SFIA1189E
Steering angle sensor Ground Voltage
3 — Battery voltage (Approx. 12 V)
SFIA1190E

BRC-72
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM

4. CHECK DATA MONITOR
1. Connect ABS actuator and electric unit (control unit) connector and steering angle sensor.
2. Perform “ST ANGLE SIG” at “DATA MONITOR” to check if the status is normal.
OK or NG
OK >> Perform self-diagnosis again.
NG >> Replace steering angle sensor, and then adjust neutral position of steering angle sensor. Refer to
BRC-40, "
Adjustment of Steering Angle Sensor Neutral Position" .
Yaw Rate/Side/Decel G Sensor SystemBFS000EC
CAUTION:
When the vehicle turns sharply, such as a spin turn, accel turn, or drift driving, while the VDC function
is OFF (VDC OFF indicator lamp turns on), a malfunction may occur in the yaw rate/side/decel G sen-
sor system, so in this case, restart the engine, and if it recovers normally, there is no malfunction.
Always erase memory after that. Refer to BRC-58, "
ERASE MEMORY" .
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check self-diagnostic results.
Is above displayed on self-diagnosis display?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect ABS actuator and electric unit (control unit) connector and yaw rate/
side/decel G sensor connector, and check the terminal for deformation, disconnection, looseness, and so
on. Repair or replace the malfunctioning part if there are.
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.
Steering condition DATA MONITOR
Straight-ahead position−5° to +5°
Turn wheel to the right by 90°. Approx. +90°
Turn wheel to the left by 90°. Approx. −90°
Self-diagnostic results
YAW RATE SENSOR
SIDE G-SEN CIRCUIT
G-SENSOR

BRC-74
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM

Pump Motor, Motor Relay SystemBFS000ED
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Is above displayed on self-diagnosis display?
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
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 MOTOR AND MOTOR RELAY POWER SYSTEM
1. Turn ignition switch OFF and disconnect ABS actuator and elec-
tric unit (control unit) connector.
2. Check voltage between the ABS actuator and electric unit (con-
trol unit) harness connector E241 terminal 1 and ground.
OK or NG
OK >> GO TO 4.
NG >> Circuit malfunction between battery and ABS actuator
and electric unit (control unit). Repair circuit.
4. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT

ABS actuator and electric unit (control unit) harness connector
E241 terminals 31, 46 and ground.
OK or NG
OK >> Replace ABS actuator and electric unit (control unit).
NG >> Harness or connector is open or shorted. Repair or
replace malfunctioning components.
Self-diagnostic results
PUMP MOTOR
ABS actuator and electric unit (contorl unit) Ground Voltage
1—Battery voltage
(Approx. 12 V)
SFIA2100E
ABS actuator and electric unit (contorl unit) Ground Continuity
31, 46 — Yes
SFIA2114E