2003 LEXUS LS430 lock

Fig. 61: Checking Wire Harness (Passenger Door ECU -Front 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 closer position switch, which detects the position of the closer.
WIRING DIAGRAM
Fig. 62: Door Closer Position Switch Circuit On Rear Left Side Door
- Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.READ VALUE OF DATA LIST (DOOR CLOSER POSITION SWITCH (POLE/HALF/ FULL))
a. Check the DATA LIST for proper functioning of the door closer position switch.
REAR DOOR LH ECU
Item
Measurement item / Display
(Range)
Normal ConditionPosition
POLE SWPawl switch signal/ ON or OFFRefer to system description of door ECU -

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 R36-a lock connector.
b. Measure the resistance.
TERMINALS RESISTANCE REFERENCE
(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

NG: REPLACE COMBINATION SWITCH ASSY
OK: Go to Next Step.
3.INSPECT COMBINATION SWITCH ASSY (PAWL SWITCH)
a. Disconnect the R36-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

OK: Go to Next Step.
4.CHECK WIRE HARNESS (REAR DOOR LH ECU - REAR DOOR LOCK ASSY LH)
a. Disconnect the R36-a lock connector.
b. Disconnect the R36 ECU connector.
c. Measure the resistance of the wire harness side connectors.
TERMINALS RESISTANCE REFERENCE
Tester ConnectionSpecified Condition
R36-a-2 - R36-23 (POLE)Below 1 ohms
R36-a-1 - R36-24 (HALF)Below 1 ohms
R36-a-4 - R36-15 (FULL)Below 1 ohms
R36-a-5 - R36-21 (DLEL)Below 1 ohms
R36-a-2 - Body ground10 kohms or higher
R36-a-1 - Body ground10 kohms or higher
R36-a-4 - Body ground10 kohms or higher
R36-a-5 - Body ground10 kohms or higher

Fig. 65: Checking Wire Harness (Rear Door LH ECU -Rear Door Lock Assy LH)
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 closer position switch, which detects the position of the closer.
WIRING DIAGRAM
Fig. 66: Door Closer Position Switch Circuit On Rear Right Side Door
- Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.READ VALUE OF DATA LIST (DOOR CLOSER POSITION SWITCH (POLE/HALF/ FULL))
1. Check the DATA LIST for proper functioning of the door closer position switch and lock position
switch.
REAR DOOR ECU RH
Item
Measurement item / Display
(Range)
Normal ConditionPosition

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

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

OK: Go to Next Step.
4.CHECK WIRE HARNESS (REAR DOOR RH ECU - REAR DOOR LOCK ASSY RH)
a. Disconnect the R37-a lock connector.
b. Disconnect the R37 ECU connector.
c. Measure the resistance of the wire harness side connectors
TERMINALS RESISTANCE REFERENCE
Tester ConnectionSpecified Condition
R37-a-2 - R37-23 (POLE)Below 1 ohms
R37-a-1 - R37-24 (HALF)Below 1 ohms
R37-a-4 - R37-15 (FULL)Below 1 ohms
R37-a-5 - R37-21 (DLEL)Below 1 ohms
R37-a-2 - Body ground10 kohms or higher
R37-a-1 - Body ground10 kohms or higher
R37-a-4 - Body ground10 kohms or higher
R37-a-5 - Body ground10 kohms or higher