Lexus ES300 (1997 year). Manual — part 132
BE05V–01
N13473
1
2
3
4
5
6
7
8
9
10
N21376
Wire Harness Side
1 2 3 4 5 6 7 8 9 10
h–10–1–c
BE–134
–
BODY ELECTRICAL
POWER MIRROR CONTROL SYSTEM
1518
1997 LEXUS ES300 (RM511U)
INSPECTION
1.
Master switch left side:
INSPECT MIRROR SWITCH CONTINUITY
Switch position
Tester connection
Specified condition
OFF
–
No continuity
UP
3 – 4 7 – 8
Continuity
DOWN
3 – 8 4 – 7
Continuity
LEFT
4 – 9 7 – 8
Continuity
RIGHT
4 – 7 8 – 9
Continuity
2.
Master switch right side:
INSPECT MIRROR SWITCH CONTINUITY
Switch position
Tester connection
Specified condition
OFF
–
No continuity
UP
2 – 4
1 – 7 – 8
Continuity
DOWN
4 – 7
1 – 2 – 8
Continuity
LEFT
4 – 10
1 – 7 – 8
Continuity
RIGHT
4 – 7
1 – 8 – 10
Continuity
If continuity is not as specified, replace the switch.
If continuity is as specified. inspect the switch circuit.
3.
INSPECT MIRROR SWITCH CIRCUIT
Disconnect the connector from the switch and inspect the con-
nector on the wire harness side.
Tester connection
Condition
Specified condition
8 – Ground
Constant
Continuity
4 – Ground
Ignition switch position LOCK
No voltage
4 – Ground
Ignition switch position ACC or ON
Battery positive voltage
If the circuit is not as specified, inspect the circuits connected
to other parts.
N13659
6
5
N21212
1
2
2
1
N21213
3
2
3
2
–
BODY ELECTRICAL
POWER MIRROR CONTROL SYSTEM
BE–135
1519
1997 LEXUS ES300 (RM511U)
4.
INSPECT INDICATOR LIGHT OPERATION
Connect the positive (+) lead from the battery to terminal 5 and
the negative (–) lead to terminal 6, and check that the indicator
light does not light up, replace the switch.
5.
INSPECT MIRROR MOTOR OPERATION
(a)
Connect the positive (+) lead from the battery to terminal
1 and the negative (–) lead to terminal 2, and check that
the mirror turns upward.
(b)
Reverse the polarity, and check that the mirror turns
downward.
(c)
Connect the positive (+) lead from the battery to terminal
3 and the negative (–) lead to terminal 2, and check that
the mirror turns to the left side.
(d)
Reverse the polarity, and check that the mirror turns to the
right side.
If operation is not as specified, replace the mirror.
Z19373
Seat Heater Switch (R)
Ignition Switch
Seat Heater
(Seat Back)
Seat Heater Switch (L)
Instrument Panel Junction Block
SEAT–HEATER Fuse
PANEL Fuse
Taillight Relay
Seat Heater
(Seat Cushion)
BE05W–01
BE–136
–
BODY ELECTRICAL
SEAT HEATER SYSTEM
1520
1997 LEXUS ES300 (RM511U)
SEAT HEATER SYSTEM
LOCATION
BE05X–01
N21250
N21372
Z07440
Wire Harness Side
1
2
3 4 5 6
N21540
–
BODY ELECTRICAL
SEAT HEATER SYSTEM
BE–137
1521
1997 LEXUS ES300 (RM511U)
INSPECTION
1.
INSPECT SEAT HEATER SWITCH CONTINUITY
Condition
Tester connection
Specified condition
OFF
2 – 6
Continuity
ON
2 – 4 – 6
Continuity
Illumination circuit
1 – 3
Continuity
If continuity is not as specified, replace the switch or bulb.
2.
INSPECT SEAT HEATER SWITCH INDICATOR
(a)
Connect the positive (+) lead from the battery to terminal
4 and the negative (–) lead to terminal 2.
(b)
Push the switches, check that the indicator lights up.
If operation is not as specified, replace the switch and inspect
the circuits connected to other parts.
3.
INSPECT SEAT HEATER SWITCH CIRCUIT
Disconnect the switch connector and inspect the connector on
the wire harness side.
Tester connection
Condition
Specified condition
2 – Ground
Constant
*
Continuity
6 – Ground
Constant
*
Continuity
4 – Ground
Ignition switch position LOCK or ACC
No voltage
4 – Ground
Ignition switch position ON
Battery positive voltage
*: There is resistance because this circuit is grounded through
the resistance.
If the circuit is not as specified, inspect the circuits connected
to other parts.
4.
INSPECT SEAT CUSHION CONTINUITY
(a)
Heat the 2 thermostats with light. Check that there is no
continuity above 45
°
C (113
°
F) between terminals 1 and
2.
(b)
Cool the 2 thermostats below 15
°
C (59
°
F). Check that
there is continuity between terminals 1 and 2.
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