Lexus ES300 (1997 year). Manual — part 192
Z13912
Above 60
°
C
(140
°
F)
2
OFF
1
ON
Z05733
Wire Harness Side
1 2
ls–2–1–D
I03031
Ignition
Switch
Battery
Warning Light
1 2
Z09972
(a)
(b)
A
B
C
A
C
B
–
BODY ELECTRICAL
COMBINATION METER
BE–103
1487
1997 LEXUS ES300 (RM511U)
(c)
Check that continuity exists between terminals with the
switch ON (float up).
(d)
Check that no continuity exists between terminals with the
switch OFF (float down).
If operation is not as specified, replace the switch.
31.
INSPECT ENGINE OIL LEVEL WARNING SWITCH CIR-
CUIT
Disconnect the switch connector and inspect the connector on
wire harness side.
Tester connection
Condition
Specified condition
2 – Ground
Constant
Continuity
If continuity is not as specified, inspect the wire harness or
ground point.
32.
INSPECT ENGINE OIL LEVEL WARNING LIGHT
(a)
Disconnect the connector from the switch.
(b)
Turn the IG switch ON, the warning light lights up.
(c)
The warning light lights up after 40 sec. from the engine
has started.
If the warning light does not light up, inspect bulb or wire har-
ness.
33.
INSPECT LIGHT CONTROL RHEOSTAT
(See page
34.
INSPECT BULB CHECK RELAY OPERATION
(a)
Connect the positive (+) lead from the battery to terminal
C through a 1.4–W test bulb and the negative (–) lead to
terminal B, check that the test bulb does not light up.
(b)
Connect the positive (+) lead from the battery to terminal
A and check that the test bulb lights up.
If operation is not as specified, replace the relay.
BE05J–01
BE–104
–
BODY ELECTRICAL
COMBINATION METER
1488
1997 LEXUS ES300 (RM511U)
REASSEMBLY
Reassembly is in the reverse of the disassembly(See page
Z19374
A/C Control Panel
Assembly
A/C Control Panel
A/C Amplifier
Ignition Switch
Instrument Panel Junction Block
DEF Fuse
HEATER Fuse
MIRROR HEATER Fuse
Defogger Relay
RH Mirror
Mirror Defogger
Defogger Wire
LH Mirror
Mirror Defogger
BE05K–04
–
BODY ELECTRICAL
DEFOGGER SYSTEM
BE–105
1489
1997 LEXUS ES300 (RM511U)
DEFOGGER SYSTEM
LOCATION
BE05L–03
N21536
29
36
30
N21537
29
36
30
ON
N21538
Wire Harness Side
17 18 19 20 21 22 23 24 25 26 27 28 29
30 31 32 33 34 35 36 37 38 39 40 41 42
N14863
1
2
5
3
3
5
2
1
BE–106
–
BODY ELECTRICAL
DEFOGGER SYSTEM
1490
1997 LEXUS ES300 (RM511U)
INSPECTION
1.
A/C control panel assembly:
INSPECT DEFOGGER SWITCH OPERATION
(a)
Connect the positive (+) lead from the battery to terminal
29 and negative (–) lead to terminal 30.
(b)
Connect the positive (+) lead from the battery to terminal
36 through a 1.4 W test bulb.
(c)
Turn the defogger switch ON and check that the test bulb
and indicator light turn ON, then turn OFF after approx. 15
minutes.
If operation is not as specified, proceed to inspect the A/C con-
trol assembly.
(See page
)
2.
INSPECT DEFOGGER SWITCH CIRCUIT
Disconnect the connector from the switch and inspect the con-
nector on wire harness side.
Tester connection
Condition
Specified condition
30 – Ground
Constant
Continuity
29 – Ground
Ignition switch position ACC or LOCK
No voltage
29 – Ground
Ignition switch position ON
Battery positive voltage
If the circuit is not as specified, inspect the circuits connected
to other parts.
3.
INSPECT DEFOGGER RELAY CONTINUITY
Condition
Tester connection
Specified condition
Constant
1 – 2
Continuity
Apply B+ between
terminals 1 and 2.
3 – 5
Continuity
If continuity is not as specified, replace the relay.
4.
INSPECT DEFOGGER RELAY CIRCUIT
(See page
)
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