Lexus GS300/400 (2000 year). Service manual — part 55

I04169

1

2

I04170

6

2

I04171

6

2

I04172

6

2

8

9

11

I04173

6

2

8

9

11

BE–178

–

BODY ELECTRICAL

POWER MIRROR CONTROL SYSTEM

2479

(b)

Reverse the polarity, and check that the mirror turns to the
right side.

(c)

Connect the positive (+) lead from the battery to terminal
6 and the negative (–) lead to terminal 2, and check that
the mirror turns upward.

(d)

Reverse the polarity, and check that the mirror turns
downward.

If operation is not as specified, replace the mirror assembly.
9.

w/ Driving position memory:
INSPECT MIRROR MOTOR CIRCUIT
Left side: (See page

DI–882

)

Right side: (See page

DI–916

)

10.

w/ Driving position memory only:
INSPECT MIRROR POSITION SENSORS OPERATION

HINT:
Strip off the vinyl tape of the connector and remove terminals
1, 2, 6, 8, 9, 10 and 11 from the connector housing.
(a)

Connect a series of three 1.5 V dry cell batteries.

(b)

Connect the positive (+) lead from the dry cell batteries to
terminal 8 and the negative (–) lead to terminal 11.

(c)

Connect the positive (+) lead from the voltmeter to termi-
nal 9 and the negative (–) lead to terminal 11.

(d)

Apply battery positive voltage to terminals 2 and 6, then
check that the voltage gradually changes according to the
table below while the mirror moves between the upper-
most position and lowermost position.

Mirror

position

Lowermost

Mirror

position

Uppermost

Voltage

2.8 – 5.0

Changes

gradually

0 – 1.8

If voltage value is not as specified, replace the motor assembly.

I04174

2

1

8

10

11

I04175

2

1

8

10

11

I04176

SW1

SW2

SET Switch

I07732

When folded front

At drive
position

At retract position

(a)

(b)

(c)

(d)

(e)

–

BODY ELECTRICAL

POWER MIRROR CONTROL SYSTEM

BE–179

2480

(e)

Disconnect the 4 leads of the battery and voltmeter.

(f)

Connect the positive (+) lead from the voltmeter to termi-
nal 10 and negative (–) lead to terminal 11.

(g)

Apply battery positive voltage to terminals 1 and 2, then
inspect that the voltage gradually changes according to
the table below while the mirror moves between the left–
most position and right–most position.

Mirror

position

Left–most

Mirror

position

Right–most

Voltage

LEFT

2.8 – 5.0

Changes

gradually

0 – 1.8

Voltage

RIGHT

0 – 1.8

Changes

gradually

2.8 –5.0

If voltage value is not as specified, replace the motor assembly.
11.

w/ Driving position memory only:
INSPECT MIRROR POSITION SENSORS CIRCUIT
Left side: (See page

DI–884

)

Right side (See page

DI–918

)

12.

INSPECT DRIVING POSITION MEMORY AND RE-
TURN SWITCH CONTINUITY

Switch position

Tester connection

Specified condition

SET switch ON

1 – 7

Continuity

Return SW1 ON

1 – 3

Continuity

Return SW2 ON

1 – 5

Continuity

If continuity is not as specified, replace the switch.
13.

INSPECT DRIVING POSITION MEMORY AND RE-
TURN SWITCH CIRCUIT (See page

DI–887

)

14.

TAIWAN models:
INSPECT ELECTRICAL RETRACT MOTOR OPERA-
TION

(a)

When folded front position:
(1)

Connect the positive (+) lead from the battery to ter-
minal 1 and negative (–) lead to terminal 2, check
that the mirror operates at retract position.

(2)

Reverse the polarity, check that the mirror does not
operate.

If operation is not as specified, replace the mirror assembly.
(b)

Between folded front position and driving position:
(1)

Connect the positive (+) lead from the battery to ter-
minal 1 and negative (–) lead to terminal 2, check
that the mirror operates at retract position.

(2)

Reverse the polarity, check that the mirror operate
at folded front position.

If operation is not as specified, replace the mirror assembly.

BE–180

–

BODY ELECTRICAL

POWER MIRROR CONTROL SYSTEM

2481

(c)

When driving position:
(1)

Connect the positive (+) lead from the battery to ter-
minal 1 and negative (–) lead to terminal 2, check
that the mirror operates at retract position.

(2)

Reverse the polarity, check that the mirror does not
operate.

If operation is not as specified, replace the mirror assembly.
(d)

Between driving position and retract position:
(1)

Connect the positive (+) lead from the battery to ter-
minal 1 and negative (–) lead to terminal 2, check
that the mirror operates at retract position.

(2)

Reverse the polarity, check that the mirror operate
at return position (Stopping at driving position).

If operation is not as specified, replace the mirror assembly.
(e)

When retract position:
(1)

Connect the positive (+) lead from the battery to ter-
minal 1 and negative (–) lead to terminal 2, check
that the mirror does not operates.

(2)

Reverse the polarity, check that the mirror operate
at return position (Stopping at driving position).

If operation is not as specified, replace the mirror assembly.

BE0HC–06

I01369

Electro Chromic Outer Mirror

Electro Chromic Inner Mirror

Driver Side Junction Block

ECU–IG Fuse

–

BODY ELECTRICAL

ELECTRO CHROMIC MIRROR SYSTEM

BE–181

2482

ELECTRO CHROMIC MIRROR SYSTEM

LOCATION