2003 LEXUS LS430 Diagram AC

Fig. 6: Cancel Function Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
If the child lock of a rear door is engaged, it cannot be canceled by operating the inside door
handle.
d. Closer Motor and Cam Position Switch
Three cam position switches (1 to 3) are provided in the closer motor. In accordance with these
switches' ON/OFF patterns, the closer motor's rotating positions are determined in the 3 segments
of the motor's movin
g range.

Fig. 26: Door Closer Motor Malfunction On Driver Side Door - Description Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Fig. 27: Door Closer Motor Malfunction On Driver Side Door
- Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.READ VALUE OF DATA LIST (CAM POSITION SWITCH)
a. Check the DATA LIST for proper functioning of the cam position switches.
DRIVER DOOR ECU
Item
Measurement item/ Display
(Range)
Normal ConditionDiagnostic Note
CAM
POS
SW3Cam position switch 3 (OFF/ON)Refer to system description of closer
motor and position switch (SEE
SYSTEM DESCRIPTION
)
-
CAM
POS
SW2Cam position switch 2 (OFF/ON)Refer to system description of closer
motor and position switch (SEE
SYSTEM DESCRIPTION
)
-

Fig. 30: Door Closer Motor Malfunction On Passenger Side Door - Description Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Fig. 31: Door Closer Motor Malfunction On Passenger Side Door
- Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.READ VALUE OF DATA LIST (CAM POSITION SWITCH)
a. Check the DATA LIST for proper functioning of the cam position switches.
PASSENGER DOOR ECU
Item
Measurement item/ Display
(Range)
Normal ConditionDiagnostic Note
CAM
POS SW3Cam position switch 3
(OFF/ON)Refer to system description of closer
motor and position switch (SEE
SYSTEM DESCRIPTION
)
-
CAM
POS SW2Cam position switch 2
(OFF/ON)Refer to system description of closer
motor and position switch (SEE
SYSTEM DESCRIPTION
)
-

Fig. 34: Door Closer Motor Malfunction On Rear Right Side Door - Description Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Fig. 35: Door Closer Motor Malfunction On Rear Right Side Door
- Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.READ VALUE OF DATA LIST (CAM POSITION SWITCH)
a. Check the DATA LIST for proper functioning of the cam position switches.
REAR DOOR ECU RH
Item
Measurement item/ Display
(Range)
Normal ConditionDiagnostic Note
CAM POS
SW3Cam position switch 3
(OFF/ON)Refer to system description of closer
motor and position switch (see
SYSTEM DESCRIPTION
)
-
CAM POS
SW2Cam position switch 2
(OFF/ON)Refer to system description of closer
motor and position switch (SEE
SYSTEM DESCRIPTION
)
-
CAM POS
SW1Cam position switch 1
(OFF/ON)Refer to system description of closer
motor and position switch (SEE -

Fig. 38: Door Closer Motor Malfunction On Rear Left Side Door - Description Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Fig. 39: Door Closer Motor Malfunction On Rear Left Side Door
- Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.READ VALUE OF DATA LIST (CAM POSITION SWITCH)
a. Check the DATA LIST for proper functioning of the cam position switches.
REAR DOOR ECU LH
Item
Measurement item/ Display
(Range)
Normal ConditionDiagnostic Note
CAM POS
SW3Cam position switch 3
(OFF/ON)Refer to system description of closer
motor and position switch (SEE
SYSTEM DESCRIPTION
)
-
CAM POS
SW2Cam position switch 2
(OFF/ON)Refer to system description of closer
motor and position switch (SEE
SYSTEM DESCRIPTION
)
-
CAM POS
SW1Cam position switch 1
(OFF/ON)Refer to system description of closer
motor and position switch (SEE -

Fig. 41: Checking Rear Door Lock Assy LH (Cam Position Switch)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Refer to the system description for the ON/OFF patterns of the cam position switch (SEE SYSTEM
DESCRIPTION ).
NG: REPLACE REAR DOOR LOCK ASSY LH
OK: REPLACE REAR DOOR ECU LH
CIRCUIT DESCRIPTION
This circuit supplies power to operate the driver door ECU.
WIRING DIAGRAM

Fig. 42: Driver Door ECU Power Source Circuit - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.INSPECT FUSE (MPX-IG, AM1, D DOOR, MPX-B1, D/C CUT)
a. Remove the MPX-IG and AM1 fuses from the driver side J/B.
b. Remove the D DOOR and MPX-B1 fuses from the passenger side J/B.
c. Remove the D/C CUT fuse from the FL block assy.
d. Measure the resistance.
Standard: Below 1 ohms

This circuit supplies power to operate the passenger door ECU.
WIRING DIAGRAM
Fig. 45: Passenger Door ECU Power Source Circuit
- Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE