Page 69 of 326

System Description
OPERATION
Headlamp system on vehicles for North Europe contains a daytime light system. The unit operates to illumi-
nate headlamps low beam, parking, tail, license lamps and illuminations automatically in the following condi-
tions.
+The engine is running with lighting switch in OFF position.
When the any of following conditions exists, the daytime light operation will be canceled.
+Ignition switch is in any position other than ON
+Engine is stopped
+Lighting 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
+from alternator terminal L
+through daytime light control unit terminalj
8
+to 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.
SEL490V
HEADLAMP Ð Daytime Light System Ð
EL-65
Page 70 of 326
DAYTIME LIGHT IS CALCELED
(Lighting switch in 1st or 2nd position or ignition switch in START position)
+Ignition switch is in START position
+Lighting switch is in 1st or 2nd position.
When one of the above conditions exists, power is supplied
+to base of the transistor-1 in daytime light control unit
+through daytime light control unit terminalj
11orj6.
And then, power supply path to the base transistor-2 is interrupted to cancel daytime light operation.
SEL491V
HEADLAMP Ð Daytime Light System Ð
System Description (Cont'd)
EL-66
Page 73 of 326
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-63).
Aiming Adjustment
Refer to ``HEADLAMP'' (EL-63).
HEADLAMP Ð Daytime Light System Ð
EL-69
Page 139 of 326

System Description
The warning chime is combined with the smart entrance control unit.
Both the ignition key and light warning chime will not sound, when ignition switch in the ON or START posi-
tion. (When power supply exists at smart entrance control unit terminalj
12.)
IGNITION KEY WARNING CHIME
With the key in the ignition key cylinder, the ignition switch in the OFF or ACC position, and the driver's door
open, the warning chime will sound. A battery positive voltage is supplied
+from key switch terminalj
1
+to smart entrance control unit terminalj1.
Ground is supplied
+through driver side door switch
+to smart entrance control unit terminalj
7.
LIGHT WARNING CHIME
With ignition switch in the OFF or ACC position, driver's door open, and lighting switch in 1ST or 2ND position,
warning chime will sound. A battery positive voltage is supplied
+from lighting switch terminalj
12or daytime light control unit
+to smart entrance control unit terminalj
14.
Ground is supplied
+through driver side door switch
+to smart entrance control unit terminalj
7.
WARNING CHIME
EL-135
Page 142 of 326
Trouble Diagnoses
SYMPTOM CHART
REFERENCE PAGE EL-138 EL-139 EL-139
SYMPTOM
DIAGNOSTIC PROCEDURE 1
(Lighting switch input signal check)
DIAGNOSTIC PROCEDURE 2
(Key switch input signal check)
DIAGNOSTIC PROCEDURE 3
Light warning chime does not acti-
vate.XX
Ignition key warning chime does not
activate.XX
All warning chimes do not activate.X
DIAGNOSTIC PROCEDURE 1
(Lighting switch input signal check)
CHECK LIGHTING SWITCH INPUT SIG-
NAL.
Check voltage between control unit termi-
nalj
14and ground.
OK
cNG
Check the following.
+7.5A fuse (No.
42,
located in the fuse and
fusible link box) for LHD
models
+Harness for open or
short between control
unit and lighting switch/
daytime light control unit
Go to DIAGNOSTIC PROCEDURE 3.
Condition of lighting
switchVoltage [V]
1ST or 2ND Approx. 12
OFF 0
SEL851UB
.
WARNING CHIME
EL-138