2003 LEXUS LS430 lock

Fig. 150: Removing Nuts And Lock Cylinder
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
14.w/ Camera:
REMOVE TELEVISION CAMERA ASSY
a. Remove the 2 bolts and camera.

Fig. 151: Removing Television Camera Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
15.REMOVE LUGGAGE DOOR LOCK OPENER ASSY
a. Remove the 2 screws and opener.

Fig. 152: Removing Luggage Door Lock Opener Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
16.REMOVE LUGGAGE DOOR CLOSER ASSY
a. Disconnect the connector.
b. Remove the 2 bolts and door closer.

Fig. 157: Removing 3 Clips
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
d. Using a screwdriver, remove the wire harness cover.
HINT:
Tape the screwdriver tip before use.
e. Using a screwdriver, remove the 2 rope hooks.
HINT:
Turn the rope hook 90 degrees counterclockwise. Insert a screwdriver (with its tip taped) into the
slit in the side of the rope hook. Hold down the claw inside the slit and remove the rope hook as
shown in the illustration.

Fig. 170: Installing Luggage Door Closer Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
26.INSTALL LUGGAGE COMPARTMENT DOOR LOCK CYLINDER ASSY
a. Install the lock cylinder with the 2 nuts.
Torque: 5.5 N.m (56 kgf.cm, 49 in..lbf)
b. Connect the connector.

Fig. 171: Installing Lock Cylinder With Nuts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
27.w/ Smart key system:
INSTALL LUGGAGE ELECTRICAL KEY SWITCH
a. Install the switch with the 2 nuts.
Torque: 8.0 N.m (82 kgf.cm, 71 in..lbf)
b. Connect the connector.
28.w/o Smart key system:
INSTALL LUGGAGE ELECTRICAL KEY SWITCH COVER
a. Install the cover with the 2 nuts.
Torque: 8.0 N.m (82 kgf.cm, 71 in..lbf)

Fig. 2: Identifying Engine Immobilizer System Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
1.ENGINE IMMOBILIZER SYSTEM DESCRIPTION
The engine immobilizer system is designed to prevent the vehicle from being stolen. This system uses a
steering lock ECU that stores the key codes of authorized smart keys. If an attempt is made to start the
engine using an unauthorized key, the ECU sends a signal to the ECM to prohibit fuel delivery and
ignition, effectively disabling the engine.
2.FUNCTION OF MAIN COMPONENT
MAIN COMPONENT FUNCTION TABLE
ComponentOutline
Transponder key coil/amplifierWhen key is inserted in ignition key cylinder, key
coil receives key's ID code. Then amplifier
amplifies ID code and outputs it to steering lock
ECU.
Unlock warning switchDetects if key is in ignition key cylinder and outputs
results to steering lock ECU
ECMThrough SFI communication, ECM receives ID
verification results from steering lock ECU. ECM
also verifies ECUs. Then judgement of whether or
not to immobilize engine is made.
Security indicatorDepending on operation of theft warning ECU (theft
deterrent ECU), interior security indicator lamp

3.SYSTEM FUNCTION
When the steering lock ECU detects that the unlock warning switch is ON, the ECU provides current to
the transponder key coil and produces a faint electric wave. A transponder chip in the key and receives
the faint electric wave. Upon receiving the faint electric wave, the transponder chip outputs a key ID code
signal. The transponder key coil receives this signal, the transponder key amplifier amplifies it, and then
the signal is transmitted to the ECU.
The ECU matches the key's ID code with the vehicle's ID code, which was previously registered in the
ECU and then communicates the results to the ECM using SFI communication.
After the identification results show that the key's ID code matches the vehicle's ID code and the ECU has
confirmed their match: 1) the immobilizer system does not immobilize the engine and the engine starting
controls (fuel injection control and ignition control) enter standby mode; and 2) the ECU transmits a
security indicator signal that communicates "indicator off" to the theft warning ECU (theft deterrent
ECU). Then, the theft warning ECU turns off the security indicator lamp.
HINT:
Use this procedure to troubleshoot the engine immobilizer system.
The hand-held tester should be used in steps 4, 5 and 7.
1.VEHICLE BROUGHT TO WORKSHOP
2.CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK (See CUSTOMER
PROBLEM ANALYSIS CHECK )
3.CRANK ENGINE FOR MORE THAN 10 SECONDS
4.CHECK FOR DTCS
a. Check for DTCs and note any codes that are output.
b. Delete the DTC.
c. Recheck for DTCs. Based on the DTC output in (a), try to force output of the same SFI system
DTC or engine immobilizer system DTC by simulating the operation indicated by the DTC.
1. If the DTC does not reoccur, proceed to A.
2. If the SFI system DTC reoccurs, proceed to B.
3. If the engine immobilizer system DTC reoccurs, proceed to C.
B: Go to SFI SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING
)
C: Go to step 8
illuminates or starts blinking.