2003 NISSAN TEANA engine control

TROUBLE DIAGNOSIS
BRC-55
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Control Unit Input/Output Signal SpecificationsBFS000E1
REFERENCE VALUE FROM CONSULT-II
CAUTION:
The monitor displays the control unit calculation data. The normal values will be displayed even in the
event that the output circuit (harness) is open or shorted.
Monitor item Display itemDATA MONITOR
ConditionReference values for
normal operation
WHEEL SENSORVehicle speed calculated using sig-
nals from all four wheel sensorsVehicle stopped 0 [km/h (MPH)]
Vehicle running (Note 1)Almost in accordance
with speedometer dis-
play (within ± 10 %)
DECEL G SENSOR Decel G detected by decel G sensorWhen stopped -0.11 to +0.11 G
During acceleration Negative value
During deceleration Positive value
IN ABS S/V
OUT ABS S/VOperation condition of all solenoid
valvesWhen the actuator solenoid operates ON
When the actuator relay operates and
the actuator solenoid does not operateOFF
EBD WARN LAMP
(Note 2)Brake warning lamp ON/OFF condi-
tionWhen brake warning lamp is ON ON
When brake warning lamp is OFF OFF
STOP LAMP SW Brake pedal operation conditionBrake pedal depressed ON
Brake pedal not depressed OFF
MOTOR RELAYMotor and motor relay operation con-
ditionWhen motor relay and motor are
operatingON
When motor relay and motor are not
operatingOFF
ACTUATOR RLY Actuator relay operation conditionActuator relay activated ON
Actuator relay not activated OFF
ABS WARN LAMPABS warning lamp ON/OFF condition
(Note 3)When ABS warning lamp is ON ON
When ABS warning lamp is OFF OFF
OFF LAMPVDC OFF indicator lamp ON/OFF
condition (Note 4)When VDC OFF indicator lamp is ON ON
When VDC OFF indicator lamp is OFF OFF
OFF SW VDC OFF switch ON/OFF conditionWhen VDC OFF switch ON
(When the VDC OFF indicator lamp is
ON)ON
When VDC OFF switch OFF
(When the VDC OFF indicator lamp is
OFF)OFF
SLIP LAMPSLIP indicator lamp ON/OFF condi-
tion (Note 5)When SLIP indicator lamp is ON ON
When SLIP indicator lamp is OFF OFF
BATTERY VOLTBattery voltage supplied to ABS actu-
ator and electric unit (control unit)Ignition switch ON 10 - 16 V
GEARDetermined gearshift position from
the A/T switch signalAlways1: 1st gear
2: 2nd gear
3: 3rd gear
4: 4th gear
ENGINE SPEED Engine runningWith engine stopped 0 rpm
Engine runningAlmost in accordance
with tachometer display
YAW RATE SEN Yaw rate detected by yaw rate sensor When stopped−7.0 to +7.0 d/s

BRC-58
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS

Self-DiagnosisBFS000E3
DESCRIPTION

If an error is detected in the system, ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp
on the combination meter turn on. In this case, perform self-diagnosis as follows:

While CONSULT-II is used, ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp may be
turned on in a case of no malfunctioning.
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. Start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.
5. After stopping vehicle, with the engine running, touch “ABS”, “SELF-DIAG RESULTS” in order on the
CONSULT-II screen.
CAUTION:
If “START (NISSAN BASED VHCL)” is touched immediately after starting engine or turning on the
ignition switch, “ABS” might not be displayed in the System Selection screen. In this case, repeat
the operation from step 1. If it cannot be shown after several attempts, ABS actuator and electric
unit (control unit) may have malfunctioned.
6. The self-diagnostic results are displayed. (Touch “PRINT” to print out self-diagnostic results, if necessary.)

Check ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp if “NO FAILURE” is dis-
played.
7. Perform the appropriate inspection from the display item list, and repair or replace the malfunctioning
component.
8. Start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.
CAUTION:
When the wheel sensor malfunctions, after inspecting the wheel sensor system, the ABS warning
lamp, VDC OFF indicator lamp and SLIP indicator lamp will not turn off even when the system is
normal unless the vehicle is driving at 30 km/h (19MPH) or more for approximately 1 minute.
ERASE MEMORY
1. Turn ignition switch OFF.
2. Start engine and touch “ABS”, “SELF-DIAG RESULTS”, “ERASE MEMORY” in order on the CONSULT-II
screen to erase the DTC memory.
CAUTION:
If the error memory is not erased, re-perform the operation from step 4.
3. Perform self-diagnosis again, and make sure that diagnostic memory is erased.
4. Drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute as the final inspection, and make
sure that the ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp turn off.
CAUTION:
VDC OFF switch should not stay in the “ON” position.

BRC-60
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS

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- FR LH IN ABS SOL
[C1120]This is displayed when the control unit detects a malfunction in the
front left wheel inlet solenoid circuit.
BRC-76, "
Solenoid and
VDC Change-Over Valve,
Actuator Relay System"
FR LH OUT ABS SOL
[C1121]This is displayed when the control unit detects a malfunction in the
front left wheel outlet solenoid circuit.
FR RH IN ABS SOL
[C1122]This is displayed when the control unit detects a malfunction in the
front right wheel inlet solenoid circuit.
FR RH OUT ABS SOL
[C1123]This is displayed when the control unit detects a malfunction in the
front right wheel outlet solenoid circuit.
RR LH IN ABS SOL
[C1124]This is displayed when the control unit detects a malfunction in the
rear left wheel inlet solenoid circuit.
RR LH OUT ABS SOL
[C1125]This is displayed when the control unit detects a malfunction in the
rear left wheel outlet solenoid circuit.
RR RH IN ABS SOL
[C1126]This is displayed when the control unit detects a malfunction in the
rear right wheel inlet solenoid circuit.
RR RH OUT ABS SOL
[C1127]This is displayed when the control unit detects a malfunction in the
rear right wheel outlet solenoid circuit.
CV 1
[C1164]When cut valve 1 circuit is open or shorted.
CV 2
[C1165]When cut valve 2 circuit is open or shorted.
SV 1
[C1166]When suction valve 1 circuit is open or shorted.
SV 2
[C1167]When suction valve 2 circuit is open or shorted.
ACTUATOR RLY
[C1140]This is displayed when the control unit detects a malfunction in
actuator relay circuit.
ENGINE SIGNAL 1- 6
[C1130, C1131, C1132, C1133,
C1134, C1136]When there is a malfunction in an engine system main
component.BRC-70, "
Engine Sys-
tem"
ST ANGLE SIG CIRCUIT
[C1143]When the steering angle sensor neutral position has deviated. Or
when a steering angle sensor malfunction is detected.BRC-71, "Steering Angle
Sensor System"
ST ANG SEN SIGNAL
[C1144]Neutral position correction of steering angle sensor is not finished.BRC-40, "Adjustment of
Steering Angle Sensor
Neutral Position"
YAW RATE SENSOR
[C1145]When yaw rate sensor malfunction is detected. Or when a yaw rate
sensor circuit open or short circuit is detected.
BRC-72, "
Yaw Rate/Side/
Decel G Sensor System"SIDE G-SEN CIRCUIT
[C1146]When a side G sensor malfunction is detected. Or the circuit of side
G sensor is open or shorted.
PNP POSI SIG
[C1154]TCS or ABS actuator and electric unit (control unit) internal mal-
function.BRC-75, "
Park/Neutral
Position (PNP) Switch
Circuit"
BR FLUID LEVEL LOW
[C1155]Brake fluid level drops. Or, when there is a short to ground in the
circuit between the ABS actuator and electric unit (control unit) and
the brake fluid level switch.BRC-80, "Brake Fluid
Level Switch System"
ST ANG SEN COM CIR
[C1156]CAN communication system or steering angle sensor has gener-
ated a malfunction.BRC-81, "CAN Communi-
cation System"
STOP LAMP SW2
[C1176]ASCD brake switch or circuit malfunction.EC-602, "DTC P1572
ASCD BRAKE SWITCH"
CAN COMM CIRCUIT
[U1000]When there is a malfunction in the CAN communication system.BRC-81, "CAN Communi-
cation System"
(Note 2) Diagnostic item Diagnostic item is detected when... Reference

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-65
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

For Fast and Accurate DiagnosisBFS000E6
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 adjust the neutral position of steering angle sensor before driving when removing and installing
ABS actuator and electric unit (control unit), steering angle sensor, suspension parts and adjusting align-
ment. Refer to BRC-40, "
Adjustment of Steering Angle Sensor Neutral Position" .

Always erase memory after completing trouble diagnosis. Refer to BRC-58, "ERASE MEMORY" .

When inspection of the continuity or voltage between modules or units is performed, check connector ter-
minals for disconnection, looseness, bend, or collapse. Repair or replace applicable part if any non-stan-
dard 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 may occur, but the system is operating normally.
Symptom Symptom description Result
Motor operation soundThis is the operation sound of the motor in the actuator and electric unit.Slight
sound may occur during VDC, TCS and ABS operation.
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 soundWhen engine starts, “click” sound may be heard from engine room. This is nor-
mal status of system operation check.Normal
VDC/TCS operation
(SLIP indicator lamp ON)TCS may activate momentarily if wheel speed changes when driving over
location where friction coefficient varies, when downshifting, or when fully
depressing accelerator pedal.
Normal
Cancel the VDC/
TCS function for
the inspection on
a chassis dyna-
mometer. Before the speed meter inspection, push VDC OFF switch to cancel the VDC/
TCS function.
When accelerator pedal is depressed on a chassis dynamometer (front wheel
fixing type), the vehicle speed will not increase. This is normal. It is result of
TCS being activated by stationary front wheels. The warning lamp may also
turn on to show “sensor system malfunction” in this case. This is also normal,
and is the result of the stationary front wheels being detected. Restart engine,
and drive the vehicle at 30 km/h (19 MPH) or more to make sure that the warn-
ing lamp no longer turns on.
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
Sluggish feelDepending on road conditions, the driver may have a sluggish feel. This is
because traction control, which controls engine and brakes to achieve optimal
traction, has the highest priority (for safety). As a result sometimes the driver
has a less slight sluggish feel in response than usual acceleration feel.Normal

BRC-66
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS

Basic InspectionBFS000E7
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 actuator for leakage. If leakage or oozing is detected, check
as follows:

If ABS actuator and electric unit (control unit) connections are loose, tighten connections to the speci-
fied 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 leak.

If leakage or oozing is detected on 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" , “FRONT DISC BRAKE”, BR-33,
"PAD WEAR INSPECTION" , “REAR DISC BRAKE”.
POWER SUPPLY CIRCUIT TERMINAL LOOSENESS AND BATTERY
Check battery for looseness on the battery positive/negative terminal and ground connection. Also make sure
that battery voltage does not drop.
INSPECTION OF ABS WARNING LAMP, BRAKE WARNING LAMP, VDC OFF INDICATOR LAMP,
AND SLIP INDICATOR LAMP
×: ON –: OFF
Note 1: Turns off after engine start
Note 2: The brake warning lamp turns on during parking brake operation (when switch is on) and brake fluid level sensor operation
(insufficient brake fluid).
1. Make sure that when the ignition switch is turned ON, the ABS warning lamp, VDC OFF indicator lamp
(when VDC OFF switch is off), and SLIP indicator lamp turn 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-81, "
CAN Communication System" . Be sure to check VDC OFF switch before checking VDC OFF
indicator lamp. Refer to BRC-81, "
VDC OFF SWITCH" . Check combination meter if there is no malfunc-
tion in CAN communication system and VDC OFF switch. Refer to DI-4, "
COMBINATION METERS" .
2. Check if the ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn 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-diagnosis.
ConditionABS warning
lampBrake warning
lamp (Note 2)VDC OFF indica-
tor lampSLIP indicator
lampRemarks
Ignition switch OFF ———— —
For a while after ignition
switch is turned ON×× (Note 1)××—
In a while after ignition
switch is turned ON
(System normal)—× (Note 1) — —Turns OFF 2 seconds
after ignition switch is
turned ON.
When the VDC OFF
switch is turned ON.
(VDC function OFF)——×——
VDC/TCS/ABS error×—××When there is an
ABS actuator and
electric unit (control
unit) error (power
ground or system
malfunction).
When VDC/TCS is not func-
tioning normally.——××—
EBD error××××—

TROUBLE DIAGNOSIS
BRC-67
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

3. With the engine running, make sure that the VDC OFF indicator lamp turns on and off when the
VDC OFF switch turns ON and OFF. If it does not operate in accordance with the switch, check the
VDC OFF switch system. Refer to BRC-81, "
VDC OFF SWITCH" .
4. Perform self-diagnosis of ABS actuator and electric unit (control unit) if ABS warning lamp, VDC OFF indi-
cator lamp, and SLIP indicator lamp do not turn off 10 seconds after engine is started.
5. Always erase self-diagnostic results after completing self-diagnosis. Refer to BRC-58, "
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).

BRC-70
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM

Engine SystemBFS000E9
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 ENGINE SYSTEM
1. Perform ECM self-diagnosis and repair or replace any non-standard items. Perform ECM self-diagnosis.
2. Perform ABS actuator and electric unit (control unit) self-diagnosis.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace applicable item. Perform ABS actuator and electric unit (control unit) self-diag-
nosis again.
ABS Actuator and Electric Unit (Control Unit) 1BFS000EA
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Is above displayed on self-diagnosis display?
YES >> Replace ABS actuator and electric unit (control unit). Perform self-diagnosis again.
NO >> INSPECTION END
Self-diagnostic results
ENGINE SIGNAL 1
ENGINE SIGNAL 2
ENGINE SIGNAL 3
ENGINE SIGNAL 4
ENGINE SIGNAL 5
ENGINE SIGNAL 6
Self-diagnostic results
CONTROLLER FAILURE