Lexus ES300 (1997 year). Service manual — part 240
BE–24
–
BODY ELECTRICAL
IGNITION SWITCH AND KEY UNLOCK WARNING
SWITCH
1408
1997 LEXUS ES300 (RM511U)
Tester connection
Condition
Specified condition
A19 – Ground
Driver’s door key lock and unlock switch OFF or
LOCK
No continuity
A19 – Ground
Driver’s door key lock and unlock switch
UNLOCK
Continuity
A20 – Ground
Passenger’s door key lock and unlock switch
OFF or LOCK
No continuity
A20 – Ground
Passenger’s door key lock and unlock switch
UNLOCK
Continuity
A1 – Ground
Constant
Battery positive voltage
B1 – Ground
Light control switch OFF
No voltage
B1 – Ground
Light control switch TAIL or HEAD
Battery positive voltage
B4 – Ground
Light control switch OFF or TAIL
No voltage
B4 – Ground
Light control switch HEAD
Battery positive voltage
B2 – Ground
B3 – Ground
Constant
Battery positive voltage
If the circuit is as specified, try replacing the relay with a new
one.
If the circuit is not as specified, inspect the circuits connected
to other parts.
Z19392
Headlights
Automatic Light
Control Sensor
E/G Room Junction Block
HEAD (RH) Fuse
HEAD (LH) Fuse
HEAD (RH–LH) Fuse
DOME Fuse
HEAD (LH–LO) Fuse
ECU–B Fuse
Headllight Control Relay
CANADA:
E/G Room R/B No.2
HEAD (RH–LWR) fuse
HEAD (LH–LWR) fuse
D.R.L No.2 Fuse
D.R.L No.2 Relay
D.R.L No.3 Relay
D.R.L No.4 Relay
USA
CANADA
Combination Switch
Light Control Switch
Headlight Dimmer Switch
Ignition Switch
D.R.L.(MAIN) Relay
Taillight
D.R.L.:Daytime Running Light
Door Courtesy Switch
Instrument Panel
Junction Block
GAUGE Fuse
TAIL Fuse
Taillight Control Relay
Integration Relay
BE04W–01
–
BODY ELECTRICAL
HEADLIGHT AND TAILLIGHT SYSTEM
BE–25
1409
1997 LEXUS ES300 (RM511U)
HEADLIGHT AND TAILLIGHT SYSTEM
LOCATION
BE04X–01
N21561
Steering Position Sensor
Combination Switch
Light Control Switch
Headlight Dimmer Switch
Switch Body
Steering Position Disc
Wiper and Washer Switch
Combination Switch
Spiral Cable
BE–26
–
BODY ELECTRICAL
HEADLIGHT AND TAILLIGHT SYSTEM
1410
1997 LEXUS ES300 (RM511U)
COMPONENTS
BE04Y–02
N21562
Hi beam
AUTO
HEAD
TAIL
OFF
Flash
7
8
17
16
14 13
12
N21563
Wire Harness Side
2
1
3 4 5
6
7 8
13 14 15 16
9 10 11 12
17
–
BODY ELECTRICAL
HEADLIGHT AND TAILLIGHT SYSTEM
BE–27
1411
1997 LEXUS ES300 (RM511U)
INSPECTION
1.
INSPECT LIGHT CONTROL SWITCH CONTINUITY
Switch position
Tester connection
Specified condition
OFF
–
No continuity
TAIL
14 – 16
Continuity
HEAD
13 – 14 – 16
Continuity
AUTO
12 – 16
Continuity
If continuity is not as specified, replace the switch.
2.
INSPECT HEADLIGHT DIMMER SWITCH CONTINU-
ITY
Switch position
Tester connection
Specified condition
Low beam
16 – 17
Continuity
High beam
7 – 16
Continuity
Flash
7 – 8 – 16
Continuity
If continuity is not as specified, replace the switch.
3.
INSPECT COMBINATION SWITCH CIRCUIT
Connect the wire harness side connector to the combination
switch and inspect wire harness side connector from the back
side.
Light Control Switch:
Tester connection
Condition
Specified condition
16 – Ground
Constant
Continuity
12 – Ground
Light control switch OFF, TAIL or HEAD
No voltage
12 – Ground
Light control switch AUTO
Battery positive voltage
13 – Ground
Light control switch OFF or TAIL
No voltage
13 – Ground
Light control switch HEAD
Battery positive voltage
14 – Ground
Light control switch OFF
No voltage
14 – Ground
Light control switch TAIL or HEAD
Battery positive voltage
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