sensor NISSAN PRIMERA 1999 Electronic Repair Manual

Precautions
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)“AIR
BAG”and“SEAT BELT PRE-TENSIONER”
The Supplemental Restraint System “Air Bag” and “Seat Belt Pre-tensioner”, 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 an air bag module (located in the center of the steering wheel
and on the instrument panel on the passenger side, where fitted), seat belt pre-tensioners, a diagnosis sen-
sor 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 help 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:

To 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.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses (except“SEAT BELT-TENSIONER”connector) can be
identified with yellow harness connector (and with yellow harness protector or yellow insulation
tape before the harness connectors). Not use electrical test equipment on any circuit related to
the SRS.
PRECAUTIONS AND PREPARATION
EL-5

GROUND CONNECT TO CONN. CELL CODE
M6/M26/M28 A/C AUTO AMP. M115 HA-A/C
A/C CONTROL PANEL M44, M47 HA-A/C
A/C HIGH RELAY M119 HA-A/C
A/C LOW RELAY (Type-1) M120 HA-A/C
A/C LOW RELAY (Type-2) M123 HA-A/C
A/C MH RELAY (Type-1) M118 HA-A/C
A/C MED-HIGH RELAY (Type-2) M122 HA-A/C
A/C MED-LOW RELAY M121 HA-A/C
AUDIO M42 EL-ILL, EL-AUDIO
CIGARETTE LIGHTER SOCKET M39 EL-HORN
COMBINATION METER (ILLUMINATION)
(Without illumination control switch) (Models before VIN -
P11U0548750)E124 EL-ILL
COMBINATION METER (ABS WARNING LAMP) (Models before
VIN - P11U0548750)M38 BR-ABS
COMBINATION METER (AIR BAG WARNING LAMP) (Models
before VIN - P11U0548750)M38 RS-SRS
COMBINATION METER (AIR BAG WARNING LAMP) (Models
after VIN - P11U0548750)M89 RS-SRS
COMBINATION METER (HIGH BEAM INDICATOR) (Models
before VIN - P11U0548750)E124 EL-H/LAMP, EL-DTRL
COMBINATION METER (Hyper CVT M6 models) (Models before
VIN - P11U0548750)M38 AT-NONDTC
COMBINATION METER (Hyper CVT M6 models) (Models after
VIN - P11U0548750)M89 AT-NONDTC
COMBINATION METER (SPEEDOMETER) (Models before VIN -
P11U0548750)M38 EC-VSS
COMBINATION METER (SPEEDOMETER) (Models after VIN -
P11U0548750)M89 EC-VSS
COMBINATION METER (Models before VIN - P11U0548750) M38 EL-METER, EL-WARN, EL-HORN
COMBINATION METER (Models after VIN - P11U0548750) M89 EL-METER, EL-WARN, EL-HORN
COMBINATION METER (Models after VIN - P11U0548750) E131 AT-NONDTC, EL-ILL
CONTROL DEVICE (Hyper CVT M6 models) M79 AT-NONDTC, EL-ILL
CONTROL DEVICE (Hyper CVT models) M49 AT-NONDTC, EL-ILL
DATA LINK CONNECTOR M59 EC-MIL/DL
DATA LINK CONNECTOR (TERMINAL NO. 13) M59 RS-SRS
AIRBAG DIAGNOSIS SENSOR UNIT M87 RS-SRS
DONGLE CONTROL UNIT (RHD) M85 EL-NATS, EL-AUDIO
DOOR MIRROR REMOTE CONTROL SWITCH M5 EL-MIRROR
FAN SWITCH M46 HA-HEATER
FAN SWITCH (Gasoline engine) (without A/C) M46 EC-LOAD
FUSE BLOCK (J/B) (IGNITION RELAY, BLOWER RELAY) M1 EL-POWER
FUSE BLOCK (J/B) (FRONT FOG LAMP RELAY) M1 EL-F/FOG, EL-POWER
FUSE BLOCK (J/B) (POWER WINDOW RELAY) M1EL-WINDOW, EL-SROOF,
EL-POWER
GLOVE BOX LAMP (ILLUMINATION) M24 EL-ILL
HAZARD SWITCH M58 EL-TURN, EL-ILL
HEATER (ILLUMINATION) M45 EL-ILL
INDICATOR CONTROL UNIT (Hyper CVT M6 models) M72 AT-NONDTC
RDNT BRAKE SWITCH (RHD) (CD20 engine) M64 EC-BRK/SW
A/C CONTROL PANEL (REAR WINDOW DEFOGGER SWITCH) M44 EL-ILL, EL-DEF
A/C CONTROL PANEL (RECIRCULATION SWITCH) M47 HA-HEATER, EL-ILL
SUNROOF SWITCH R4 EL-SLOOF
SPOT LAMP R5 EL-ILL
TIME CONTROL UNIT B96EL-BUZZER, EL-S/LOCK,
EL-D/LOCK, EL-THEFT, EL-DEF,
EL-MULTI, EL-INT/L, EL-TURN
VANITY MIRROR LAMP (LHD) R9 EL-INT/L
VANITY MIRROR LAMP (RHD) R2 EL-INT/L
VEHICLE SPEED SENSOR F25 EL-METER, EC-VSS
E10 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) E78 BR-ABS
GROUND DISTRIBUTION
EL-23

GROUND CONNECT TO CONN. CELL CODE
E11/E37 ACCESSORY RELAY E95 EL-POWER, EL-HORN
BRAKE FLUID LEVEL SWITCH E14 EL-WARN
CLEARANCE LAMP LH E85 EL-TAIL/L
CLEARANCE LAMP RH E87 EL-TAIL/L
COMBINATION METER (FRONT FOG LAMP INDICATOR) (Mod-
els before VIN - P11U0548750)E124 EL-F/FOG
COMBINATION METER (FRONT FOG LAMP INDICATOR) (Mod-
els after VIN - P11U0548750)E131 EL-F/FOG
COMBINATION METER (REAR FOG LAMP INDICATOR) (Models
before VIN - P11U0548750)E124 EL-R/FOG
COMBINATION METER (REAR FOG LAMP INDICATOR) (Models
after VIN - P11U0548750)E131 EL-R/FOG
COMBINATION METER (HIGH BEAM INDICATOR) (Models after
VIN - P11U0548750)E131 EL-H/LAMP, EL-DTRL
COMBINATION METER (ILLUMINATION) (Models after VIN -
P11U0548750)E131 EL-ILL
COMBINATION METER (TURN) (Models before VIN -
P11U0548750)E124 EL-TURN
COMBINATION METER (TURN) (Models after VIN -
P11U0548750)E131 EL-TURN
COMBINATION SWITCH (FRONT WIPER SWITCH) E114 EL-WIPER, EL-WIP/R
COMBINATION SWITCH (TRIP COMPUTER SWITCH) E114 EL-METER
COMBINATION SWITCH (TURN SIGNAL SWITCH) E111 EL-TURN
COOLING FAN MOTOR-1 (Gasoline engine) E19 HA-A/C, EC-COOL/F
COOLING FAN MOTOR-2 (CD20 engine) E18 HA-A/C, EC-COOL/F
COOLING FAN MOTOR-2 (QG18, SR20 engine) E28 HA-A/C, EC-COOL/F
COOLING FAN MOTOR-2 (With A/C) (GA16 engine) E94 HA-A/C, EC-COOL/F
COOLING FAN RELAY-2 (CD engine) E54 HA-A/C, EL-COOL/F
DAYTIME LIGHT CONTROL UNIT E117 EL-DTRL
FRONT FOG LAMP LH (Type-1) E6 EL-F/FOG
FRONT FOG LAMP LH (Type-2) E146 EL-F/FOG
FRONT FOG LAMP RH (Type-1) E34 EL-F/FOG
FRONT FOG LAMP RH (Type-2) E147 EL-F/FOG
FRONT TURN SIGNAL LAMP LH E8 EL-TURN, EL-THEFT
FRONT TURN SIGNAL LAMP RH E36 EL-TURN, EL-THEFT
FRONT WIPER MOTOR E62 EL-WIPER
FRONT WIPER RELAY E70 EL-WIPER
HEAD LAMP RELAY LH E74 EL-H/LAMP, EL-DTRL
HEAD LAMP RELAY RH E75 EL-HLC, EL-H/LAMP, EL-DTRL
HEAD LAMP WASHER MOTOR E38 EL-HLC
HEAD LAMP WASHER SWITCH E128 EL-HLC, EL-ILL
HEADLAMP AIMING MOTOR LH E4 EL-H/AIM
HEADLAMP AIMING MOTOR RH E33 EL-H/AIM
HEADLAMP LH E5 EL-H/LAMP, EL-DTRL
HEADLAMP RH E32 EL-H/LAMP, EL-DTRL
HOOD SWITCH E12 EL-THEFT
NATS IMMU E121 EL-NATS
POWER STEERING OIL PRESSURE SWITCH (Gasoline) E60 EC-PST/SW
RDNT BRAKE SWITCH (LHD) (CD20 engine) E122 EC-BRK/SW
REAR WIPER RELAY E52 EL-WIP/R
SEDIMENTER SENSOR E13 EL-WARN
SIDE TURN SIGNAL LAMP LH (Type-1) E9 EL-TURN, EL-THEFT
SIDE TURN SIGNAL LAMP LH (Type-2) E148 EL-TURN, EL-THEFT
SIDE TURN SIGNAL LAMP RH (Type-1) E59 EL-TURN, EL-THEFT
SIDE TURN SIGNAL LAMP RH (Type-2) E149 EL-TURN, EL-THEFT
TRIPLE-PRESSURE SWITCH (CD engine) E20 HA-A/C, EC-COOL/F
WASHER LEVEL SWITCH E39 EL-WARN
E68 ALTERNATOR (GA engine) E71 EL-CHARGE
E88 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) E78 BR-ABS
F9 ALTERNATOR (QG16, QG18, SR20, CD engine) F10 EL-CHARGE
GROUND DISTRIBUTION
EL-24

GROUND CONNECT TO CONN. CELL CODE
F15/F18 CAMSHAFT POSITION SENSOR (QG16, QG18 engine) F95 EC-PHASE
CONDENSER (QG16, QG18 engine) F94 EC-IGN/SG
CRANKSHAFT POSITION SENSOR (QG16, QG18 engine) F88 EC-POS
DATA LINK CONNECTOR M59 EC-MIL/DL
DISTRIBUTOR (CAMSHAFT POSITION SENSOR) (GA16, SR20
engine)F33 EC-CMPS
DISTRIBUTOR (GA16, SR20 engine) F33 EC-IGN/SG
ECM (CD20 engine) F116 EC-MAIN
ECM (Gasoline engine) F101 EC-MAIN
HEATED OXYGEN SENSOR 2 (REAR) (QG18, SR20 engine)
(Type-1)F76 EC-O2S2B1, EC-02HSB1
HEATED OXYGEN SENSOR 2 (REAR) (QG16, QG18 engine)
(Type-2)F123 EC-O2S2B1, EC-02HSB1
HEATED OXYGEN SENSOR 2 (REAR) (SR20 engine) (Type-2) F117 EC-O2S2B1, EC-02HSB1
IACV-FICD SOLENOID VALVE (GA16 engine) F40 EC-FICD, HA-A/C
IGNITION COIL NO. 1 (QG16, QG18 engine) F89 EC-IGN/SG
IGNITION COIL NO. 2 (QG16, QG18 engine) F90 EC-IGN/SG
IGNITION COIL NO. 3 (QG16, QG18 engine) F91 EC-IGN/SG
IGNITION COIL NO. 4 (QG16, QG18 engine) F92 EC-IGN/SG
PARK/NEUTRAL POSITION (PNP) SWITCH (M/T models) F28 EC-PNP/SW
PARK/NEUTRAL POSITION (PNP) SWITCH (CVT models) F72 EC-PNP/SW, EL-START
SHIELD WIRE (CAMSHAFT POSITION SENSOR) (QG18 engine)
(If so equipped)F95 EC-PHASE
SHIELD WIRE (CRANKSHAFT POSITION SENSOR) (QG18
engine) (If so equipped)F88 EC-POS
SHIELD WIRE (CRANKSHAFT POSITION SENSOR) (SR20
engine)F83 EC-CKPS
SHIELD WIRE (DISTRIBUTOR) (GA16, SR20 engine) (If so
equipped)F33 EC-CMPS
SHIELD WIRE (HEATED OXYGEN SENSOR) (GA16 engine) F34 EC-HO2S
SHIELD WIRE (HEATED OXYGEN SENSOR 1 (FRONT)) (QG18,
SR20 engine) (If so equipped)F34EC-O2S1B1, EC-O2H1B1,
EC-FUEL
SHIELD WIRE (HEATED OXYGEN SENSOR 2 (REAR) (QG18,
SR20 engine) (If so equipped)F76 EC-O2S2B1, EC-O2H2B1
SHIELD WIRE (MASS AIR FLOW SENSOR) (Gasoline engine) (If
so equipped)F38 EC-MAFS
SHIELD WIRE (THROTTLE POSITION SENSOR) (Gasoline
engine) (If so equipped)F16 EC-TPS, AT-TPS
TCM (TRANSMISSION CONTROL MODULE) M78 AT-MAIN, AT-TPS
GROUND DISTRIBUTION
EL-25

GROUND CONNECT TO CONN. CELL CODE
B18/B27 AUTO LEVEL CONTROL UNIT B123 EL-H/AIM
BACK-UP LAMP (Sedan) (LHD) T13 EL-BACK/L
BACK-UP LAMP (Sedan) (RHD) T8 EL-BACK/L
CD AUTO CHANGER B47 EL-AUDIO
CENTRAL UNLOCK/TRUNK OR BACK DOOR RELEASE
SWITCHB121 EL-S/LOCK, EL-D/LOCK
DOOR LOCK ACTUATOR ASSEMBLY (DRIVER’S SIDE)
(UNLOCK SENSOR) (With super lock)D7 EL-S/LOCK, EL-MULTI, EL-THEFT
DOOR LOCK ACTUATOR ASSEMBLY (DRIVER’S SIDE)
(UNLOCK SENSOR) (With power door lock)D26 EL-D/LOCK, EL-MULTI, EL-THEFT
DOOR LOCK ACTUATOR ASSEMBLY (PASSENGER SIDE)
(UNLOCK SENSOR) (With super lock)D16 EL-S/LOCK, EL-MULTI, EL-THEFT
DOOR LOCK ACTUATOR ASSEMBLY (PASSENGER SIDE)
(UNLOCK SENSOR) (With power door lock)D27 EL-D/LOCK, EL-MULTI, EL-THEFT
DOOR LOCK ACTUATOR ASSEMBLY REAR LH (UNLOCK SEN-
SOR) (With super lock)D21 EL-THEFT, EL-MULTI
DOOR LOCK ACTUATOR ASSEMBLY REAR LH (UNLOCK SEN-
SOR) (With power door lock)D28 EL-MULTI, EL-THEFT
DOOR LOCK ACTUATOR ASSEMBLY REAR RH (UNLOCK SEN-
SOR) (With super lock)D25 EL-THEFT, EL-MULTI
DOOR LOCK ACTUATOR ASSEMBLY REAR RH (UNLOCK SEN-
SOR) (With power door lock)D29 EL-MULTI, EL-THEFT
DOOR MIRROR HEATER (DRIVER’S SIDE) (Type-1) D4 EL-DEF
DOOR MIRROR HEATER (DRIVER’S SIDE) (Type-2) D31 EL-DEF
DOOR MIRROR HEATER (PASSENGER SIDE) (Type-1) D13 EL-DEF
DOOR MIRROR HEATER (PASSENGER SIDE) (Type-2) D30 EL-DEF
EXTERNAL TRUNK RELEASE SWITCH (Sedan) T20 EL-S/LOCK, EL-D/LOCK
FUEL PUMP (GA16, QG18, SR20 engine) B30 EC-F/PUMP
FUEL LEVEL SENSOR UNIT B31 EL-METER, EL-WARN
HEADLAMP AIMING SWITCH (Type-1) B106 EL-H/AIM, EL-ILL
HEADLAMP AIMING SWITCH (Type-2) E129 EL-H/AIM, EL-ILL
HEATED SEAT LH B21 EL-HSEAT
HEATED SEAT RH B61 EL-HSEAT
HEATED SEAT SWITCH LH B104 EL-HSEAT
HEATED SEAT SWITCH RH B105 EL-HSEAT
KEY CYLINDER SWITCH (DRIVER’S SIDE) D9 EL-S/LOCK, EL-THEFT, EL-D/LOCK
KEY CYLINDER SWITCH (PASSENGER SIDE) D17 EL-S/LOCK, EL-D/LOCK
POWER SEAT B22 EL-SEAT
POWER SOCKET (Wagon) B86 EL-HORN
POWER WINDOW MAIN SWITCH D5 EL-WINDOW
REAR FOG LAMP (LHD) (Sedan with type-1) T8 EL-R/FOG
REAR FOG LAMP (RHD) (Sedan with type-1) T13 EL-R/FOG
REAR WIPER MOTOR (Sedan) B52 EL-WIP/R
SIDE AIR BAG MODULE LH B142 RS-SRS
SIDE AIR BAG MODULE RH B143 RS-SRS
TRUNK ROOM LAMP SWITCH (Sedan) T10EL-INT/L, EL-WARN, EL-THEFT, EL-
MULTI
ULTRA SONIC CANCEL SWITCH B102 EL-THEFT
GROUND DISTRIBUTION
EL-26

GROUND CONNECT TO CONN. CELL CODE
B48/D110 BACK-UP LAMP (Hatchback) (LHD) D108 EL-BACK/L
BACK-UP LAMP (Hatchback) (RHD) B134 EL-BACK/L
EXTERNAL BACK DOOR RELEASE SWITCH (Hatchback) D117 EL-S/LOCK, EL-D/LOCK
HIGH-MOUNTED STOP LAMP (Hatchback) D114 EL-STOP
HIGH-MOUNTED STOP LAMP (Wagon) B85 EL-STOP
LICENSE PLATE LAMP LH (Hatchback with type-1) B127 EL-TAIL/L
LICENSE PLATE LAMP LH (Hatchback with type-2) B149 EL-TAIL/L
LICENSE PLATE LAMP LH (Wagon) D106 EL-TAIL/L
LICENSE PLATE LAMP RH (Hatchback with type-1) B128 EL-TAIL/L
LICENSE PLATE LAMP RH (Hatchback with type-2) B148 EL-TAIL/L
LICENSE PLATE LAMP RH (Wagon) D116 EL-TAIL/L
LUGGAGE ROOM LAMP SWITCH (Hatchback) (Wagon) D105EL-INT/L, EL-WARN, EL-THEFT, EL-
MULTI
REAR COMBINATION LAMP LH (BACK-UP LAMP) (Wagon for
LHD)D104 EL-BACK
REAR COMBINATION LAMP LH (REAR FOG LAMP LH) (with
type-1)D104 EL-R/FOG
REAR COMBINATION LAMP LH (STOP LAMP)
(Hatchback) (Wagon)B46 EL-STOP
REAR COMBINATION LAMP LH (TAIL LAMP) (Hatchback)
(Wagon)B46 EL-TAIL/L
REAR COMBINATION LAMP LH (TURN SIGNAL)
(Hatchback) (Wagon)B46 EL-TURN, EL-THEFT
REAR COMBINATION LAMP RH (BACK-UP LAMP) (Wagon for
RHD)D108 EL-BACK/L
REAR COMBINATION LAMP RH (REAR FOG LAMP RH) (with
type-1)D108 EL-R/FOG
REAR COMBINATION LAMP RH (STOP LAMP)
(Hatchback) (Wagon)B49 EL-STOP
REAR COMBINATION LAMP RH (TAIL LAMP) (Hatchback)
(Wagon)B49 EL-TAIL/L
REAR COMBINATION LAMP RH (TURN SIGNAL)
(Hatchback) (Wagon)B49 EL-TURN, EL-THEFT
REAR FOG LAMP (LHD) (Hatchback) B135 EL-R/FOG
REAR FOG LAMP (RHD) (Hatchback) D119 EL-R/FOG
REAR WINDOW DEFOGGER (Hatchback) B41 EL-DEF
REAR WINDOW DEFOGGER (Wagon) D113 EL-DEF
REAR WIPER MOTOR (Hatchback) (Wagon) D107 EL-WIP/R
B65 SHIELD WIRE (SATELLITE SENSOR LH) (with type-1) B70 RS-SRS
SHIELD WIRE (SATELLITE SENSOR LH) (with type-2) B137 RS-SRS
B72 SHIELD WIRE (SATELLITE SENSOR RH) B71 RS-SRS
B119 REAR WINDOW DEFOGGER (Sedan) B120 EL-DEF
B150/B151 LICENSE PLATE LAMP LH (Sedan with type-2) B149 EL-TAIL/L
LICENSE PLATE LAMP RH (Sedan with type-2) B148 EL-TAIL/L
REAR COMBINATION LAMP LH (STOP LAMP) (Sedan with
type-2)B145 EL-STOP
REAR COMBINATION LAMP LH (TAIL LAMP) (Sedan with type-2) B145 EL-TAIL/L
REAR COMBINATION LAMP LH (TURN SIGNAL) (Sedan with
type-2)B145 EL-TURN, EL-THEFT
REAR COMBINATION LAMP RH (STOP LAMP) (Sedan with
type-2)B152 EL-STOP
REAR COMBINATION LAMP RH (TAIL LAMP) (Sedan with type-2) B152 EL-TAIL/L
REAR COMBINATION LAMP RH (TURN SIGNAL) (Sedan with
type-2)B152 EL-TURN, EL-THEFT
GROUND DISTRIBUTION
EL-27

System Description
The auto level control unit is designed to adjust the beam angle of the headlamp in response to the load-
ing conditions of the vehicle. It is not designed to compensate for the dynamic handling of the vehicle.
The vehicle’s front and rear height is measured by sensors attached to the front stabilizer bar and the rear
suspension lateral link arm. The sensors provide a signal to the auto level control unit, which calculates the
correct headlamp aiming position and sends a signal to the aiming motors.
Initialisation
After the replacement or adjustment of any suspension sensor, the system must be self calibrated. This is
achieved as follows.
The vehicle must be empty, since any load will result in an invalid calibration. From outside of the vehicle
turn ignition on and then within 7 seconds the light switch must be turned from off to side lights on position,
5 times, finishing with the lamps in the on position.
The headlamps will then move to the highest, then the lowest then the normal position to indicate that the
calibration is successful, as can be seen by the moving beam pattern.
After successful calibration the headlamps must then be aimed in the conventional manner. Refer to EL-70.
HEADLAMP—Headlamp Aiming Control (Auto)—
EL-91

Component Parts and Harness
Connector Location
NEL528
Auto level control unit
Rear sensor
Headlamp aiming motor RH
Front sensor
Headlamp aiming motor LH
Rear sensor
Auto level control unit Front sensor Headlamp
aiming motor
HEADLAMP—Headlamp Aiming Control (Auto)—
EL-92

Lighting condition of the bulb System condition Reference item
NEL531 IGN ON
ON
OFF1 sec.
No malfunction is detected.
No further action is neces-
sary.
—
NEL532 IGN ON
ON
OFF1 sec.2 sec. 2 sec.
0.5 sec.
Front sensor or front sensor
circuit is malfunctioning.
(When rear sensor OK)Go to DIAGNOSTIC
PROCEDURE 1
(EL-97).
NEL533 IGN ON
ON
OFF1 sec.2 sec. 2 sec.
0.5 sec. 0.5 sec.
Rear sensor or rear sensor
circuit is malfunctioning.
(Whatever the state of front
sensor)Go to DIAGNOSTIC
PROCEDURE 2
(EL-97).
NEL534 IGN ON
ON
OFF1 sec.2 sec. 2 sec.
0.5 sec. 0.5 sec.
Sensor supply is malfunction-
ing.Go to DIAGNOSTIC
PROCEDURE 1 and
2 (EL-97).
NEL535 IGN ON
ON
OFF1 sec.2 sec. 2 sec.
0.5 sec. 0.5 sec.
Aiming motor or aiming motor
circuit is malfunctioning.Go to DIAGNOSTIC
PROCEDURE 3
(EL-98).
NEL536 IGN ON
ON
OFF
Auto level control unit is mal-
functioning.Replace auto level
control unit.
HEADLAMP—Headlamp Aiming Control (Auto)—
Trouble Diagnosis (Cont’d)
EL-96

DIAGNOSTIC PROCEDURE 1
(Front sensor check)
1) Disconnect control unit and front
sensor connector.
2) Check harness continuity between
control unit and front sensor.
Continuity should exist.
OK
NG
Check harness between
control unit and front
sensor.
1) Remove sensor.
2) Check front sensor linkage opera-
tion.
OK
NG
Replace sensor linkage.
Replace front sensor.
DIAGNOSTIC PROCEDURE 2
(Rear sensor check)
1) Disconnect control unit and rear
sensor connector.
2) Check harness continuity between
control unit and rear sensor.
Continuity should exist.
OK
NG
Check harness between
control unit and rear sen-
sor.
1) Remove the sensor.
2) Check rear sensor linkage opera-
tion.
OK
NG
Replace sensor linkage.
Replace rear sensor.
NEL537
Auto leveling control
unitB123Front sensorB131
NEL538
Auto leveling control
unitB123Rear sensor
B133




HEADLAMP—Headlamp Aiming Control (Auto)—
Trouble Diagnosis (Cont’d)
EL-97