Lexus RX300 (MCU15). Service manual - part 353

DI2FA–06

I19164

Power Window Motor
D Jam Protection Limit Switch
D Jam Protection Pulse Switch

Power Window Switch

Rear Left Door ECU

Door Lock Assembly
D Door Courtesy Switch
D Door Unlock Detection Switch
D Door Lock Motor

DI–644

–

DIAGNOSTICS

REAR LEFT DOOR CONTROL SYSTEM

LEXUS RX300   (RM785E)

PARTS LOCATION

DI2FH–08

I03226

R15

R14

REAR LEFT DOOR ECU

3

2

1

5

4

8

7

6

10

13

12

11

9

5

4

3

2

1

8

7

6

18

17

16

15

14

19

25

24

23

22

21

20

–

DIAGNOSTICS

REAR LEFT DOOR CONTROL SYSTEM

DI–645

LEXUS RX300   (RM785E)

TERMINALS OF ECU

Symbols (Terminals No.)

Wiring Color

Condition

STD Voltage (V)

A– ↔ GND 

L B ↔ W B

Door lock switch OFF or LOCK

Below 1.0

A  ↔ GND 

(R14–1 ↔ R14–25)

L–B ↔ W–B

Door lock switch UNLOCK

10 – 14

CTY ↔ GND 

R W ↔ W B

Rear LH door closed

10 – 14

CTY ↔ GND 

(R14–8 ↔ R14–25)

R–W ↔ W–B

Rear LH door open

Below 1.0

SIG ↔ GND

(R14–9 ↔ R14–25)

R–L ↔ W–B

Constant

10 – 14

PCTO ↔ GND

L O ↔ W B

Window lock switch UNLOCK*

10 – 14

PCTO ↔ GND

(R14–10 ↔ R14–25)

L–O ↔ W–B

Window lock switch LOCK*

Below 1.0

PCTI ↔ GND

Y B ↔ W B

Window lock switch UNLOCK*

10 – 14

PCTI ↔ GND

(R14–11 ↔ R14–25)

Y–B ↔ W–B

Window lock switch LOCK*

Below 1.0

A+ ↔ GND 

L R ↔ W B

Door lock switch OFF or UNLOCK

Below 1.0

A+ ↔ GND 

(R14–13 ↔ R14–25)

L–R ↔ W–B

Door lock switch LOCK

10 – 14

BDR ↔ GND 

(R14–14 ↔ R14–25)

L–Y ↔ W–B

Constant

10 – 14

CPUB ↔ GND 

(R14–15 ↔ R14–25)

G–B ↔ W–B

Constant

10 – 14

LSW ↔ GND 

GR ↔ W B

Rear LH door is locked

10 – 14

LSW ↔ GND 

(R14–17 ↔ R14–25)

GR ↔ W–B

Rear LH door is unlocked

Below 1.0

AUTO ↔ GND 

lgnition switch ON and power window switch OFF, UP or DOWN

Below 1.0

AUTO ↔ GND 

(R14–22 ↔ R14–25)

Y ↔ W–B

lgnition switch ON and power window switch AUTO UP or

DOWN

10 – 14

MDN ↔ GND 

Y R ↔ W B

lgnition switch ON and power window switch OFF or UP

Below 1.0

MDN ↔ GND 

(R14–23 ↔ R14–25)

Y–R ↔ W–B

lgnition switch ON and power window switch DOWN

10 – 14

MUP ↔ GND 

Y G ↔ W B

lgnition switch ON and power window switch OFF or DOWN

Below 1.0

MUP ↔ GND 

(R14–24 ↔ R14–25)

Y–G ↔ W–B

lgnition switch ON and power window switch UP

10 – 14

DN ↔ GND 

G ↔ W B

lgnition switch ON and power window switch OFF or UP

Below 1.0

DN ↔ GND 

(R15–1 ↔ R14–25)

G ↔ W–B

lgnition switch ON and power window switch DOWN

10 – 14

LMT ↔ GND 

Y ↔ W B

Window fully – close position

10 – 14

LMT ↔ GND 

(R15–2 ↔ R14–25)

Y ↔ W–B

Window except fully – close position

Below 1.0

DI–646

–

DIAGNOSTICS

REAR LEFT DOOR CONTROL SYSTEM

LEXUS RX300   (RM785E)

UP ↔ GND 

R ↔ W B

lgnition switch ON and power window switch OFF or DOWN

Below 1.0

UP ↔ GND 

(R15–3 ↔ R14–25)

R ↔ W–B

lgnition switch ON and power window switch UP

10 – 14

During power window is operate.

Pulse generation

PLS ↔ GND 

(R15 7 ↔ R14 25)

L ↔ W–B

Power window is not operate with switch ON

Below 1.0

(R15–7 ↔ R14–25)

Power window is not operate with switch OFF

10 – 14

*: Power window master switch

DI2FI–01

–

DIAGNOSTICS

REAR LEFT DOOR CONTROL SYSTEM

DI–647

LEXUS RX300   (RM785E)

PROBLEM SYMPTOMS TABLE

POWER WINDOW CONTROL SYSTEM

Symptom

Suspect Area

See page

Power window does not operate.

1. Power window switch circuit

2. Power window motor circuit

3. Rear left door ECU

DI–657

BE–84

Auto up (or down) function does not operate.

1. Power window switch circuit

2. Rear left door ECU

DI–657

Jam protection function and auto up (or down) function does not

operate.

1. Jam protection limit switch circuit

2. Jam protection pulse switch circuit

3. Rear left door ECU

BE–84

BE–84

OTHERS

Symptom

Suspect Area

See page

Parts of the door does not function.

1. Power source circuit

2. Rear left door ECU.

DI–648