2003 LEXUS LS430 Combination

OK: "ON" (door closer position switch (POLE/HALF/FULL) is ON) appears on the screen.
NG: Go to step 2
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS
TABLE
2.INSPECT COMBINATION SWITCH ASSY (HALF LATCH AND FULL LATCH SWITCH)
a. Disconnect the R37-a lock connector.
b. Measure the resistance.
TERMINALS RESISTANCE REFERENCE
POLE SWPawl switch signal/ ON or OFFRefer to system description of door ECU (SEE
SYSTEM DESCRIPTION
)
-
HALF SWHalf switch signal/ ON or OFFRefer to system description of door ECU (SEE
SYSTEM DESCRIPTION
)
-
FULL SWFull switch signal/ ON or OFFRefer to system description of door ECU (SEE
SYSTEM DESCRIPTION
)
-
Tester ConnectionConditionSpecified Condition
1 - 5Door openBelow 1 ohms
1 - 5Half latch10 kohms or higher
1 - 5Door close10 kohms or higher
4 - 5Door openBelow 1 ohms
4 - 5Half latchBelow 1 ohms
4 - 5Door closed10 kohms or higher

Fig. 67: Inspecting Combination Switch Assy (Half Latch And Full Latch Switch)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE COMBINATION SWITCH ASSY
OK: Go to Next Step.
3.INSPECT COMBINATION SWITCH ASSY (PAWL SWITCH)
a. Disconnect the R37-a lock connector.
b. Measure the resistance.
TERMINALS RESISTANCE REFERENCE
Tester ConnectionConditionSpecified Condition
2 - 5Link not pushed10 kohms or higher
2 - 5Link pushedBelow 1 ohms

Fig. 68: Inspecting Combination Switch Assy (Pawl Switch)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPLACE COMBINATION SWITCH ASSY

Fig. 69: Checking Wire Harness (Rear Door RH ECU -Rear Door Lock Assy RH)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPLACE COMBINATION SWITCH ASSY
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS
TABLE
CIRCUIT DESCRIPTION
The door lock assembly has a built-in door closer motor.
The door ECU actuates the door closer motor to fully close the door.
WIRING DIAGRAM
Fig. 70: Door Closer Motor Circuit On Driver Side Door
- Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.INSPECT FRONT DOOR LOCK ASSY LH (DOOR LOCK MOTOR)
a. Disconnect the F23 ECU connector.

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.INSPECT COMBINATION SWITCH ASSY (DRIVER SIDE)
a. Measure the resistance of the half latch and full latch switches.
TERMINALS RESISTANCE REFERENCE
If the result is not as specified, replace the switch ass
y.
Tester ConnectionConditionSpecified Condition
1 - 5Door openBelow 1 ohms
1 - 5Half latch10 kohms or higher
1 - 5Door close10 kohms or higher
4 - 5Door openBelow 1 ohms
4 - 5Half latchBelow 1 ohms
4 - 5Door closed10 kohms or higher

Fig. 87: Inspecting Combination Switch Assy (Driver Side)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 88: Inspecting Combination Switch Assy (Driver Side)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3.INSPECT DOOR CLOSER MOTOR ASSY (PASSENGER SIDE)
a. Appl
y battery voltage and check operation of the door closer link.