Lexus RX300 (MCU15). Manual — part 146

N21865

(a)

(b)

2

1

1

2

N21868

2

1

N21869

2

1

I04163

1

2

I05473

1

2

–

BODY ELECTRICAL

POWER SEAT CONTROL SYSTEM

BE–131

LEXUS RX300 (RM785E)

13.

INSPECT RECLINING MOTOR OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
1 and the negative (–) lead to terminal 2, check that the
motor turns counterclockwise.

(b)

Reverse the polarity, check that the motor turns clock-
wise.

If operation is not as specified, replace the seat adjuster.

14.

INSPECT RECLINING MOTOR PTC THERMISTOR OP-
ERATION

(a)

Connect the positive (+) lead from the battery to terminal
2, the positive (+) lead from the ammeter to terminal 1 and
the negative (–) lead to the battery negative (–) terminal,
then recline the seat back to the most forward position.

(b)

Continue to apply voltage, check that the current changes
to less than 1 ampere within 4 to 90 seconds.

(c)

Disconnect the leads from the terminals.

(d)

Approximately 60 seconds later, connect the positive (+)
lead from the battery to terminal 1 and the negative (–)
lead to terminal 2, check that the seat back begins to fall
backward.

If operation is not as specified, replace the seat adjuster.

15.

INSPECT LUMBAR SUPPORT MOTOR OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
1 and the negative (–) lead to terminal 2, check that the
lumbar support moves to release side.

(b)

Reverse the polarity, check that the lumbar support
moves forward.

If operation is not as specified, replace the seat adjuster.

I04165

2

1

I04166

2

1

BE–132

–

BODY ELECTRICAL

POWER SEAT CONTROL SYSTEM

LEXUS RX300 (RM785E)

16.

INSPECT LUMBAR SUPPORT MOTOR CIRCUIT
BREAKER OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 1 on the lumbar
support motor connector and move the lumbar support to
front end position.

(b)

Continue to apply voltage, check that a circuit breaker op-
eration noise can be heard within 4 to 60 seconds.

(c)

Reverse the polarity, check that the lumbar support be-
gins to move release side with in spproximately 60 se-
conds.

If operation is not as specified, replace the motor.

BE0FP–03

I19143

Mirror Switch

Instrument Panel J/B
D CIG Fuse

Mirror Assembly
D Mirror Motor

Mirror Switch

Instrument Panel J/B
D CIG Fuse

–

BODY ELECTRICAL

POWER MIRROR CONTROL SYSTEM

BE–133

LEXUS RX300 (RM785E)

POWER MIRROR CONTROL SYSTEM

LOCATION

BE1YL–01

I04167

BE2357
h–10–2

Left/Right Adjustment Switch

Mirror Switch

10

1

N21376

Wire Harness Side

1 2

4 5 6 7 8 9

10

3

I07322

LH
Side

RH
Side

4

5

BE–134

–

BODY ELECTRICAL

POWER MIRROR CONTROL SYSTEM

LEXUS RX300 (RM785E)

INSPECTION

1.

INSPECT MIRROR CONTROL SWITCH CONTINUITY
Left side:

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

Right side:

Switch position

Tester connection

Specified condition

OFF

–

No continuity

UP

2 – 4, 7 – 8

Continuity

DOWN

2 – 8, 4 – 7

Continuity

LEFT

4 – 10, 7 – 8

Continuity

RIGHT

4 – 7, 8 – 10

Continuity

If continuity is not as specified, replace the switch.

2.

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 voltage

If circuit is not as specified, inspect the circuits connected to oth-
er parts.

3.

INSPECT MIRROR MOTOR OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
5 and negative (–) lead to terminal 4, check that the mirror
turns to left side.