Lexus RX300 (MCU15). Manual — part 332

I07425

IE

W–B

J5
J/C

ID1

W–B

M7
Sliding Roof
Control Switch

4

8

6

W–B

P

G–Y

OPN

Sliding Roof Gear
Assembly with ECU

9

10

7

M6

M6

M6

W–B

8

E

CLS

A

OPEN/DOWN

CLOSE/UP

DI–560

–

DIAGNOSTICS

SLIDING ROOF SYSTEM

LEXUS RX300 (RM785E)

Sliding Roof Control Switch Circuit

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:
If there is not the hand–held tester, begin with STEP 2.

1

Check sliding roof control switch operation.

PREPARATION:
Connect the hand–held tester to the DLC3.
CHECK:
(a)

Enter into DATALIST function of hand–held tester.

(b)

Check that switch status (ON/OFF) changes on the screen of hand–held tester as the sliding roof con-
trol switch of the vehicle is turned.

OK:
The motor operates normally.

NG

Replace sliding roof gear assembly
(See page DI–557).

OK

DI1RQ–06

I07346

–

DIAGNOSTICS

SLIDING ROOF SYSTEM

DI–561

LEXUS RX300 (RM785E)

2

Check sliding roof control switch.

PREPARATION:
Remove sliding roof control switch.
CHECK:
Check continuity between terminals when switch operated.
OK:

Switch position

Tester connection

Specified condition

SLIDE OPEN

4 – 8

Continuity

SLIDE OFF

–

No continuity

SLIDE CLOSE

4 – 6

Continuity

TILT DOWN

4 – 8

Continuity

TILT OFF

–

No continuity

TILT UP

4 – 6

Continuity

NG

Replace sliding roof control switch.

OK

3

Check for open and short in harness and connectors between sliding roof gear
assembly and sliding roof control switch (See page IN–32

).

NG

Repair and replace harness or connector.

OK

Proceed to next circuit inspection shown on
problem symptom table (See page DI–557).

Limit
switch No.1

Sliding
Roof
Status

Fully
Opened

Sliding

Fully
Closed

Tilting

Limit
switch No.2

200 mm point from fully
opened position

DI–562

–

DIAGNOSTICS

SLIDING ROOF SYSTEM

LEXUS RX300 (RM785E)

Sliding Roof Limit Switch Circuit

WIRING DIAGRAM

See page DI–558.

INSPECTION PROCEDURE

HINT:
If there is not the hand–held tester, begin with STEP 2.

1

Check sliding roof control switch operation (See page

DI–560

on step 1).

NG

Check sliding roof control switch circuit.
(See page DI–560)

OK

2

Check sliding roof limit switch operation.

PREPARATION:
Connect the hand–held tester to the DLC3.
CHECK:
(a)

Enter into ACTIVE TEST function of hand–held tester.

(b)

Check that ”Sliding Roof” operates as the hand–held tester directs.

(c)

At this time, check that status (ON/OFF) of limit switch No.1 and No.2 changes on the hand–held tester
screen as shown in the illustration below.

NOTICE:
Caution is necessary not to be caught in as the jam protection system does not operate during con-
ducting ACTIVE TEST.
OK:

DI1RR–04

–

DIAGNOSTICS

SLIDING ROOF SYSTEM

DI–563

LEXUS RX300 (RM785E)

NG

Replace sliding roof gear assembly
(See page DI–557).

OK

3

Check sliding roof motor status.

PREPARATION:
Connect the hand–held tester to the DLC3.
CHECK:
(a)

Enter into ACTIVE TEST function of hand–held tester.

(b)

Check that ”Sliding Roof” operates as the hand–held tester directs.

(c)

As this time, check that motor status changes on the screen of hand–held tester as the sliding roof
switch of the vehicle is turned.

OK:
The motor operates normally.

NG

Replace sliding roof gear assembly
(See page DI–557).

OK

4

Check sliding roof glass alignment. (Mechanical malfunction)
(See page BO–118).

NG

Adjustment sliding roof (See page

BO–118)

.

OK

Replace sliding roof gear assembly
(See page DI–557).