NISSAN PICK-UP 1998 Repair Manual

System Description
OPERATION
Headlamp system on vehicles for North Europe contains a daytime light system. The unit operates to illu-
minate headlamps low beam, parking, tail, license lamps and illuminations automatically in the following
conditions.
lThe engine is running with lighting switch in OFF position.
When the any of following conditions exists, the daytime light operation will be canceled.
lIgnition switch is in any position other than ON
lEngine is stopped
lLighting switch is turned to 1st or 2nd position.
If the daytime light system is canceled, lighting switch operations are the same as for conventional light sys-
tem.
DAYTIME LIGHT IS OPERATING
(With engine running and lighting switch in OFF position)
With engine running, power is supplied
lfrom alternator terminal L
lthrough daytime light control unit terminalV8
lto base of transistor-2 in the daytime light control unit.
The transistor-2 supplies ground path to all relays. Then the relays energize to illuminate lamps.
SEL667V
HEADLAMP Ð Daytime Light System Ð
EL-51

DAYTIME LIGHT IS CANCELED
(Lighting switch in 1st or 2nd position or ignition switch in START position)
lIgnition switch is in START position
lLighting switch is in 1st or 2nd position.
When one of the above conditions exists, power is supplied
lto base of the transistor-1 in daytime light control unit
lthrough daytime light control unit terminalV11orV6.
And then, power supply path to the base transistor-2 is interrupted to cancel daytime light operation.
SEL668V
HEADLAMP Ð Daytime Light System Ð
System Description (Cont'd)
EL-52

Schematic
HEL322A
HEADLAMP Ð Daytime Light System Ð
EL-53

Wiring Diagram Ð DTRL Ð
HEL323A
HEADLAMP Ð Daytime Light System Ð
EL-54

HEL324A
HEADLAMP Ð Daytime Light System Ð
Wiring Diagram Ð DTRL Ð (Cont'd)
EL-55

HEL325A
HEADLAMP Ð Daytime Light System Ð
Wiring Diagram Ð DTRL Ð (Cont'd)
EL-56

Trouble Diagnoses
DAYTIME LIGHT CONTROL UNIT INSPECTION TABLE
Terminal No. ConnectionsINPUT (I)/
OUTPUT (O)Operated conditionVoltage (V)
(Approximate
values)
1Power source for illumi-
nation & tail lampÐÐ12
2Power source for head-
lamp LHÐÐ12
3Power source for head-
lamp RHÐÐ12
4 Headlamp RH OON (daytime light operating*) 12
OFF 0
5 Headlamp LH OON (daytime light operating*) 12
OFF 0
6 Start signal I Ignition switchSTART 12
ON, ACC or OFF 0
7 Power source Ð Ignition switchON or START 12
ACC or OFF 0
8 Alternator ``L'' terminal I EngineRunning 12
Stopped 0
9 Ground Ð Ð Ð
10 Illumination & tail lamp OON (daytime light operating*) 12
OFF 0
11 Lighting switch I1STz2ND position 12
OFF 0
*: Daytime light operating: Lighting switch in ``OFF'' position with engine running.
Bulb Replacement
Refer to ``HEADLAMP'' (EL-49).
Aiming Adjustment
Refer to ``HEADLAMP'' (EL-49).
HEADLAMP Ð Daytime Light System Ð
EL-57

System Description
Headlamp system on RHD vehicles for Europe contains a dim-dip lamp system. The unit operates both
headlamp low beams at half illumination in the following conditions.
lLighting switch is turned to 1st, with ignition switch in ON position. In other conditions, the dim-dip lamp
is canceled and lighting switch operations are the same as in conventional light systems.
Schematic
HEL326A
HEADLAMP Ð Dim-dip Lamp System Ð
EL-58

Wiring Diagram Ð DIMDIP Ð
HEL327A
HEADLAMP Ð Dim-dip Lamp System Ð
EL-59

HEL328A
HEADLAMP Ð Dim-dip Lamp System Ð
Wiring Diagram Ð DIMDIP Ð (Cont'd)
EL-60