warning light NISSAN PRIMERA 1999 Electronic Repair Manual

Precautions for Supplemental Restraint System
(SRS) ªAIR BAGº and ªSEAT BELT
PRE-TENSIONERº
NCAT0002The Supplemental Restraint System ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº, used along with a seat
belt, help to reduce the risk or severity of injury to the driver and front passenger in a frontal collision. The
Supplemental Restraint System consists of air bag modules (located in the center of the steering wheel and
on the instrument panel on the passenger side), seat belt pre-tensioners, a diagnosis sensor unit, warning
lamp, wiring harness and spiral cable.
In addition to the supplemental air bag modules for a frontal collision, the supplemental side air bag used along
with the seat belt helps to reduce the risk or severity of injury to the driver and front passenger in a side col-
lision. The supplemental side air bag consists of air bag modules (located in the outer side of front seats),
satellite sensor, diagnosis sensor unit (one of components of supplemental air bags for a frontal collision),
wiring harness, warning lamp (one of components of supplemental air bags for a frontal collision). Information
necessary to service the system safely is included in theRS sectionof this Service Manual.
WARNING:
ITo avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be performed
by an authorized NISSAN dealer.
IImproper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
IDo not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses (except ªSEAT BELT PRE-TENSIONERº connector) can be
identified with yellow harness connector (and with yellow harness protector or yellow insulation
tape before the harness connectors).
Precautions for On Board Diagnostic (OBD)
System of CVT and Engine
NCAT0198The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) to warn the driver
of a malfunction causing emission deterioration.
CAUTION:
IBe sure to turn the ignition switch ªOFFº and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc.
will cause the MI to light up.
IBe sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MI to light up due to an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
IBe sure to route and secure the harnesses properly after work. Interference of the harness with a
bracket, etc. may cause the MI to light up due to a short circuit.
IBe sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MI to light up due to a malfunction of the EGR system or fuel injection system, etc.
IBe sure to erase the unnecessary malfunction information (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.
PrecautionsNCAT0003IBefore connecting or disconnecting the TCM harness
connector, turn ignition switch OFF and disconnect nega-
tive battery terminal. Failure to do so may damage the
TCM. Because battery voltage is applied to TCM even if
ignition switch is turned off.
SEF289H
PRECAUTIONS
Precautions for Supplemental Restraint System (SRS) ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº
AT-5

HOW TO ERASE DTC (WITH GST)NCAT0020S041. If the ignition switch stays ªONº after repair work, be sure to turn ignition switch ªOFFº once. Wait at least
5 seconds and then turn it ªONº (engine stopped) again.
2. Perform ªOBD SELF-DIAGNOSTIC PROCEDURE (No Tools)º. Refer to AT-25. (The engine warm-up step
can be skipped when performing the diagnosis only to erase the DTC.)
3. Select Mode 4 with Generic Scan Tool (GST). For details, refer to EC section ªGeneric Scan Tool (GST)º.
HOW TO ERASE DTC (NO TOOLS)NCAT0020S051. If the ignition switch stays ªONº after repair work, be sure to turn ignition switch ªOFFº once. Wait at least
5 seconds and then turn it ªONº (engine stopped) again.
2. Perform ªTCM SELF-DIAGNOSTIC PROCEDURE (No Tools)º. Refer to AT-25. (The engine warm-up step
can be skipped when performing the diagnosis only to erase the DTC.)
3. Change the diagnostic test mode from Mode II to Mode I by turning the mode selector on the ECM.
Refer to EC section ªHOW TO SWITCH DIAGNOSTIC TEST MODESº.
Malfunction Indicator (MI)NCAT00211. The malfunction indicator will light up when the ignition switch
is turned ON without the engine running. This is for checking
the lamp.
IIf the malfunction indicator does not light up, refer to EL sec-
tion (ªWarning Lamps/System Descriptionº, ªWARNING
LAMPS AND CHIMEº).
(Or see MI & Data Link Connectors in EC section.)
2. When the engine is started, the malfunction indicator should go
off.
If the lamp remains on, the on board diagnostic system has
detected an emission-related (OBD) malfunction. For detail,
refer to EC section (ªON BOARD DIAGNOSTIC SYSTEM
DESCRIPTIONº).
CONSULT-IINCAT0022After performing ªSELF-DIAGNOSTIC PROCEDURE (WITH CON-
SULT-II)º (AT-19), place check marks for results on the ªDIAGNOS-
TIC WORKSHEETº, AT-31. Reference pages are provided follow-
ing the items.
NOTICE:
IAdditional CONSULT-II information can be found in the Opera-
tion Manual supplied with the CONSULT-II unit.
SAT652J
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
OBD Diagnostic Trouble Code (DTC) (Cont'd)
AT-18

Purpose
The Anti-Lock Brake System (ABS) consists of electronic and hydraulic components. It allows for control of
braking force so that locking of the wheels can be avoided.
The ABS:
1) Provides improved steering control during braking (by preventing front wheel lock).
2) Provides improved vehicle stability and skid prevention during braking (by avoiding rear wheel lock).
Operation
lWhen the vehicle speed is less than 10 km/h (6 mph) this system does not work.
lThe Anti-Lock Brake System (ABS) has self-test capabilities. The system turns on the ABS warning light
for 1 second after turning the ignition switch to the ªONº position. The system performs another test the
first time the vehicle reaches 6 km/h (4 mph). A mechanical noise may be heard as the ABS performs
a self-test. This is a normal part of the self-test feature. If a malfunction is found during this check, the
ABS warning light will come on.
lDuring ABS operation, a mechanical noise may be heard. This is a normal operating condition.
ABS Hydraulic Circuit
p1Inlet solenoid valve
p2Outlet solenoid valve
p3Reservoir
p4Pump
p5Motorp6Bypass check valve
p7Damper
NBR259 Rear LH
wheelFront RH
wheelFront LH
wheelRear RH
wheel
ANTI-LOCK BRAKE SYSTEM
BR-50

System Components
System Description
SENSOR
The sensor unit consists of a gear-shaped sensor rotor and an
electro-magnetic proximity detector. The proximity detector
(ªpick-upº) contains a bar magnet around which a coil is wound.
The detector is installed on the back side of the brake rotor. An
alternating voltage is generated in the coil of the proximity detec-
tor as each tooth of the rotor cuts the magnetic field of the
detector core. The frequency and amplitude of the voltage
increases in proportion to the rotational speed of the rotor.
CONTROL UNIT
The control unit determines the wheel rotating speed from the
signal sent from the sensor, a corresponding control signal is
then output from the control unit in the form of a DC current to
the actuator solenoid valve. The ABS control unit also controls
ON-OFF operation of the valve relay and motor relay. If any
electrical malfunction should be detected in the system, the con-
trol unit causes the warning lamp to light up. In this condition, the
ABS will be deactivated by the control unit, and the vehicle's
brake system reverts to normal operation.
NBR260 Warning light
Brake tube connector
Actuator
Front wheel sensorsControl unitRear wheel sensors
SBR124B Control unit
Magnet
.Sensor (proxi-
mity detector)
Magnetic flux
Tooth
V: Induced electromotive forceMoving time of one toothSensor rotor Coil Low carbon steel
NBR284 ABS warning light
ANTI-LOCK BRAKE SYSTEM
BR-51

Preliminary Check
Check brake fluid level in reservoir
tank.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Low fluid level may indicate brake pad
wear or leakage from brake line.
Check brake line for leakage.
OK
ENG
Repair.
F
Check brake booster for operation and
air tightness. Refer to BR-18.
OK
ENG
Replace.
F
Check brake pads and rotor. Refer to
BR-23, 26, 33.
OK
ENG
Replace.
Check brake fluid level in reservoir tank.
OK
ENG
Fill up brake fluid.
Check warning lamp activation.
When ignition switch is turned on,
warning lamp turns on.
OK
ENG
Check fuse, warning
lamp bulb and warning
lamp circuit.
Check warning lamp for deactivation.
When ignition switch is turned on,
warning lamp turns on, then deacti-
vates after 1 second.
OK
ENG
Go to Self-diagnosis,
BR-67 and BR-70.
Drive vehicle at 30 km/h (19 mph) for
at least one minute.
Ensure warning lamp remains off while
driving.
OK
ENG
Go to Self-diagnosis,
BR-67 and BR-70.
END
NBR141 MAX.
MIN.
SBR389C
SBR058C
SBR059C
.
NBR284 ABS warning light
H
H
H
H
H
H
H
H
H
TROUBLE DIAGNOSES
BR-59

Component Parts and Harness Connector
Location
NBR285
Brake tube connectorWarning light
ABS actuator
and electric unit
Front wheel sensors
Front left wheel sensor connector
Front right wheel sensor connector
Sensor
E17
Rear wheel sensors
Rear left wheel sensor connector
Rear right wheel sensor connector
B33Rear left wheel
sensor connector
B32Rear right wheel
sensor connector.Rear tire
.E78
E57
Sensor
TROUBLE DIAGNOSES
BR-60

Self-diagnosis (Only models with data link
connector terminal No. 8)
FUNCTION
lWhen a problem occurs in the ABS, the warning lamp on the
instrument panel comes on. To start the self-diagnostic
results mode, ground the self-diagnostic (check) terminal
located on ªData Link Connector for CONSULT-IIº. The loca-
tion of the malfunction is indicated by the warning lamp flash-
ing.
SELF-DIAGNOSIS PROCEDURE
Drive vehicle over 30 km/h (19 mph) for at
least one minute.
Turn ignition switch to the ªLOCKº position.
Ground terminal ª8º of ªDATA LINK CON-
NECTOR for CONSULT-IIº with a suitable
harness.
Turn ignition switch to ªONº position while
grounding terminal ª8º.
Do not depress brake pedal.
After 3.0 seconds, the warning lamp starts
flashing to indicate the malfunction code
No. (See NOTE.)
Verify the location of the malfunction with
the malfunction code chart. Refer to BR-69.
Then make the necessary repairs following
the diagnostic procedures.
After the malfunctions are repaired, erase
the malfunction codes stored in the control
unit. Refer to BR-68.
Rerun the self-diagnostic results mode to
verify that the malfunction codes have been
erased.
NOTE: The indication ter-
minates after five
minutes.
However, when the
ignition switch is
turned from off to
on, the indication
starts flashing
again. Disconnect the check terminal from the
ground. The self-diagnostic results mode is
now complete.
pA
NBR295
.DATA link connector for
CONSULT-II
(Ground terminal 8 with
a suitable harness.)
NBR284 ABS warning light
NBR305
.DATA link connector
for CONSULT-II
(Disconnect the har-
ness)
H
H
H
H
H
H
H
H
H
TROUBLE DIAGNOSES
BR-67

Diagnostic Procedure 7 (Unexpected pedal
action)
CHECK BRAKE PEDAL STROKE.
Check brake pedal stroke. Is stroke
excessively large?
No
EYe s
Perform Preliminary
Check, refer to BR-59.
CHECK BRAKE PERFORMANCE
Disconnect ABS actuator and electric
unit connector and check whether brake
is effective.
Ye s
ENo
Perform Preliminary
Check, refer to BR-59.
CHECK WARNING LAMP ACTIVATE.
Ensure warning lamp remains off while
driving.
OK
ENG
Carry out self-diagnosis.
Refer to BR-67.
CHECK WHEEL SENSOR.
1. Check wheel sensor connector for
terminal damage or loose connec-
tion.
2. Perform wheel sensor mechanical
check.
Refer to Diagnostic Procedure 1,
BR-77.
OK
ENG
Repair.
CHECK HARNESS CONNECTOR.
Check ABS actuator and electric unit
pin terminals fir damage or the connec-
tion of ABS actuator and electric unit
harness connector.
Reconnect ABS actuator and electric
unit harness connector. Then retest.
Diagnostic Procedure 8 (Long stopping
distance)
CHECK ABS PERFORMANCE
Disconnect ABS actuator and electric
unit connector and check whether stop-
ping distance is still long.
Ye s
ENo
Go toin Diagnostic
Procedure 7, BR-86.
Perform Preliminary Check and air
bleeding.
Note: Stopping distance may be larger than vehicles without
ABS when road condition is slippery.
SBR540A
NBR284 ABS warning light
H
H
H
H
H
TROUBLE DIAGNOSES FOR SYMPTOMS
BR-86

pA
CHECK WARNING LAMP INDICA-
TION.
Disconnect ABS actuator and electric
unit connector.
Does the warning lamp activate?
Ye s
ENG
pB(See below)
CHECK HARNESS CONNECTOR.
Check ABS actuator and electric unit
pin terminals for damage or the con-
nection of ABS actuator and electric
unit harness connector.
Reconnect ABS actuator and electric
unit harness connector. Then retest
OK
ENG
REPLACE.
Replace ABS actuator
and electric unit.
Inspection end.
pB
CHECK HARNESS FOR SHORT.
1. Disconnect ABS actuator and elec-
tric unit connector.
2. Check voltage between ABS actua-
tor and electric unit connector (body
side) terminal 21, 22, and ground.
Battery voltage should not exist.
OK
ENG
Repair harness or con-
nector between fuse and
ABS actuator and electric
unit connector terminal.
CHECK COMBINATION METER.
Check combination meter. Refer to
WARNING LAMPS in EL section.
NBR284 ABS warning light
NBR417
ABS ACTUATOR AND
ELECTRIC UNIT CONNECTOR
.21: CVT models
22: M/T models
H
H
H
H
H
TROUBLE DIAGNOSES FOR SYMPTOMS
Diagnostic Procedure 11 (ABS Warning lamp
does not come on when ignition switch is
turned ON) (Cont'd)
BR-89

Supplemental Restraint System (SRS) ªAIR
BAGº and ªSEAT BELT PRE-TENSIONERº
NCEC0002
The Supplemental Restraint System ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº, used along with a seat
belt, help to reduce the risk or severity of injury to the driver and front passenger in a frontal collision. The
Supplemental Restraint System consists of air bag modules (located in the center of the steering wheel and
on the instrument panel on the passenger side), seat belt pre-tensioners, a diagnosis sensor unit, warning
lamp, wiring harness and spiral cable.
In addition to the supplemental air bag modules for a frontal collision, the supplemental side air bag used
along with the seat belt helps to reduce the risk or severity of injury to the driver and front passenger in a
side collision. The supplemental side air bag consists of air bag modules (located in the outer side of front
seats), satellite sensor, diagnosis sensor unit (one of components of supplemental air bags for a frontal
collision), wiring harness, warning lamp (one of components of supplemental air bags for a frontal collision).
Information necessary to service the system safely is included in theRS sectionof this Service Manual.
WARNING:
lTo avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN dealer.
lImproper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
lDo not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses (except ªSEAT BELT PRE-TENSIONERº connector) can be
identified with yellow harness connector (and with yellow harness protector or yellow insulation
tape before the harness connectors).
Precautions for On Board Diagnostic (OBD)
System of Engine
NCEC0003
The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) to warn the driver
of a malfunction causing emission deterioration.
CAUTION:
lBe sure to turn the ignition switch ªOFFº and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves,
etc. will cause the MI to light up.
lBe sure to connect and lock the connectors securely after work. A loose (unlocked) connector
will cause the MI to light up due to the open circuit. (Be sure the connector is free from water,
grease, dirt, bent terminals, etc.)
lCertain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector.
For description and how to disconnect, refer to EL section, ªDescriptionº, ªHARNESS CONNEC-
TORº.
lBe sure to route and secure the harnesses properly after work. The interference of the harness
with a bracket, etc. may cause the MI to light up due to the short circuit.
lBe sure to connect rubber tubes properly after work. A misconnected or disconnected rubber
tube may cause the MI to light up due to the malfunction of the EGR system or fuel injection
system, etc.
lBe sure to erase the unnecessary malfunction information (repairs completed) from the ECM
before returning the vehicle to the customer.
PRECAUTIONS AND PREPARATIONCD20T
EC-6