Lexus ES300 (1997 year). Manual — part 265

Z19375

Ignition Switch

Instrument Panel Junction Block

GAUGE Fuse

POWER Fuse

DOOR Fuse

Power Main Relay

Integration Relay

Sliding Roof Switch

Sliding Roof Control Relay

Sliding Roof Motor

LImit Switch

Engine Room Junction Block

DOME Fuse

BE05Q–01

BE–124

–

BODY ELECTRICAL

SLIDING ROOF SYSTEM

1508

1997 LEXUS ES300 (RM511U)

SLIDING ROOF SYSTEM

LOCATION

BE05R–01

N21643

Wire Harness Side

1 2

3

4

5 6 7

8

s–8–1

N21993

1

2

N21994

2

1

–

BODY ELECTRICAL

SLIDING ROOF SYSTEM

BE–125

1509

1997 LEXUS ES300 (RM511U)

INSPECTION

1.

INSPECT SLIDING ROOF CONTROL RELAY AND
SWITCH CIRCUIT

Disconnect the connector from the relay and switch and inspect
the connector on the wire harness side, as shown in the chart.

Tester connection

Condition

Specified condition

1 – 5

Constant

Continuity

2 – Ground

Constant

Continuity

3 – Ground

No.1 limit switch OFF (Sliding roof closed)

No continuity

3 – Ground

No.1 limit switch ON (Sliding roof opened)

Continuity

7 – Ground

No.2 limit switch OFF (Sliding roof tilted up or

open approx. 200 mm (7.87 in.))

No continuity

7 – Ground

No.2 limit switch ON (Except for conditions

mentioned above)

Continuity

4 – Ground

Ignition switch LOCK or ACC

*No voltage

Ignition switch ON

Battery positive voltage

*Exceptions: For 60 seconds after the ignition switch is turned
ON

→

OFF (ACC) or until driver or passenger door is opened

after the ignition switch is turned ON

→

OFF (ACC).

If the circuit is as specified, replace the relay and switch.

2.

INSPECT SLIDING ROOF 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 (moves of the close and up
side).

(b)

Reverse the polarity, check that the motor turns clock-
wise. (moves of the open and down side).

If operation is not as specified, replace the motor.

N21180

ON

OFF

No.1
Limit Switch

No.2
Limit Switch

1

2

3

4

5

6

N21553

Wire Harness Side

1

2

3 4
5 6

g–6–1–B

N21644

within
10 to 60
seconds

BE–126

–

BODY ELECTRICAL

SLIDING ROOF SYSTEM

1510

1997 LEXUS ES300 (RM511U)

3.

INSPECT SLIDING ROOF LIMIT SWITCH CONTINUITY

Switch position

Tester connection

Specified condition

No.1 limit switch OFF

(SW pin released)

4 – 5

No continuity

No.1 limit switch ON

(SW pin pushed in)

4 – 5

Continuity

No.2 limit switch OFF

(SW pin released)

4 – 6

No continuity

No.2 limit switch ON

(SW pin pushed in)

4 – 6

Continuity

If continuity is not as specified, replace the switch.

4.

INSPECT SLIDING ROOF MOTOR AND LIMIT SWITCH
CIRCUIT

Disconnect the connector from the limit switch and inspect the
connector on the wire harness side.

Tester connection

Condition

Specified condition

3 – Ground

Constant

Continuity

4 – Ground

Constant

Continuity

If the circuit is not as specified, inspect the circuits connected
to other parts.

5.

INSPECT CIRCUIT BREAKER OPERATION

(a)

With the sliding roof in the fully opened position, hold the
sliding roof switch in ”OPEN” position and check that
there is a circuit breaker operation noise within 10 to 60
seconds.

N21645

within
60
seconds

–

BODY ELECTRICAL

SLIDING ROOF SYSTEM

BE–127

1511

1997 LEXUS ES300 (RM511U)

(b)

With the sliding roof in fully opened position, hold the slid-
ing roof switch in ”TILT UP” position and check that the
sliding roof begins to close within 60 seconds.

If operation is not as specified, replace the motor.
6.

INSPECT KEY–OFF SLIDING ROOF OPERATION
(See integration relay circuit on page

BE–20

)