Lexus RX300 (MCU15). Service manual — part 331

DI1RN–06

I04611

M6

DI–556

–

DIAGNOSTICS

SLIDING ROOF SYSTEM

LEXUS RX300 (RM785E)

TERMINALS OF ECU

Symbols (Terminals No.)

Wiring Color

Condition

STD Voltage (V)

B ↔ E

(M6–5 ↔ M6–7)

L–O ↔ W–B

Always

10 – 14 V

E ↔ Body ground

(M6–7 ↔ Body ground)

W–B ↔

Body Ground

Always

10 – 14 V

IG ↔ E

B R ↔ W B

Ignition switch ON

10 – 14 V

IG ↔ E

(M6–8 ↔ M6–7)

B–R ↔ W–B

Ignition switch OFF or ACC

Below 1 V

OPN ↔ E

P ↔ W B

Sliding roof control switch OPEN

10 – 14 V

OPN ↔ E

(M6–9 ↔ M6–7)

P ↔ W–B

Others

Below 1 V

CLS ↔ E

G Y ↔ W B

Sliding roof control switch CLOSE

10 – 14 V

CLS ↔ E

(M6–10 ↔ M6–7)

G–Y ↔ W–B

Others

Below 1 V

DI1RO–03

–

DIAGNOSTICS

SLIDING ROOF SYSTEM

DI–557

LEXUS RX300 (RM785E)

PROBLEM SYMPTOMS TABLE

Symptom

Suspect Area

See page

Sliding roof control system does not operate.

1. Sliding Roof Gear Assembly with ECU Circuit

2. Sliding Roof Control Switch Circuit

DI–558

DI–560

Sliding roof operates abnormally or stops half way.

1. Sliding Roof Limit Switch Circuit

DI–562

Jam protection system does not operate.

1. Sliding Roof Gear Assembly with ECU Circuit

DI–558

DI1RP–06

I07424

Battery

B–R

ALT

5

W

2

Instrument Panel J/B

AM1

1G

1

ID1

M6

L–O

5

W–L

3

4

B–Y

Ignition
Switch

Instrument Panel J/B

D

1H

1C

ECU–IG

7

1C

J4 J/C

13

8

IE

W–B

ID1

W–B

7

Sliding Roof Gear

Assembly with ECU

M6

M6

ID1

4

L–O

1A

8

6

1

S/ROOF

D

B–R

J5 J/C

B–R

8

W

B

IG

E

A

2

1

F11 FL BLOCK

DI–558

–

DIAGNOSTICS

SLIDING ROOF SYSTEM

LEXUS RX300 (RM785E)

CIRCUIT INSPECTION

Sliding Roof Gear Assembly with ECU Circuit

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:
If there is not the hand–held tester, replace sliding roof drive gear assembly.

1

Perform active test.

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

Enter into ACTIVE TEST function of hand–held tester.

(b)

Check that ”Slide roof motor” operates as the hand–held tester directs.

–

DIAGNOSTICS

SLIDING ROOF SYSTEM

DI–559

LEXUS RX300 (RM785E)

OK:
The motor operates normally.
NOTICE:
Caution is necessary not to be caught in as the jam protection system does not operate during con-
ducting ACTIVE TEST.
HINT:
With one ACTIVE direction, the sliding roof can be slidden and tilted continuously.

OK

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

NG

Replace sliding roof drive gear assembly
(See page IN–32).