Where would I find the wireless door lock control receiver on a 2005 Toyota Sequoia?

remove rear panel and check latch for damage or linkage disconnect --also check electrical connections to other components

None of the door power lock's work ? Not from any switch ? F32 - 15 amp fuse location - body control module (BCM) . Probably not a fuse issue , door locks are controlled by the BCM controlling relay's located inside the BCM . This relay's are PCB - printed circuit board relay's , non serviceable . Your best bet , take it to a qualified repair shop .

Power Locks
The Body Control Module (BCM) monitors the door lock control switches. When the BCM receives an unlock/lock command from either door lock control switch, the BCM energizes a relay (internal to the BCM ) to supply the correct power and grounds for the door lock actuators.

Remote Keyless Entry (RKE)
The Remote Keyless Entry (RKE) feature is controlled by BCM . The BCM receives the RKE inputs from the Tire Pressure Monitor (TPM) module over the Medium Speed Controller Area Network (MS-CAN) . When any RKE transmitter button is pressed, the signal is received by the TPM module internal antenna. The TPM module then filters the RKE signal received to make sure it is a programmed transmitter. If the signal received is from a programmed transmitter, the TPM module sends the RKE command to the BCMover the MS-CAN . The BCM then interprets the RKE command and activates the corresponding output.
The BCM requests the illuminated entry feature to turn the interior lamps on when an unlock command is received. If a lock command is received, the illuminated entry feature turns off. The BCM then supplies voltage to the appropriate door lock actuator(s) to lock or unlock the doors. The RKE transmitter can also be used to activate the panic alarm. On vehicles with memory, the RKE transmitter also causes the BCM to send a MS-CAN message to the Driver Seat Module (DSM) to activate all memory features to the positions associated with the RKE transmitter being used.

Visual Inspection Chart

Mechanical Electrical

• Door handles
• Binding latch mechanisms

• Body Control Module (BCM) fuse(s):
  • 18 (10A)
  • 20 (20A)
• Wiring, terminals or connectors
• Door lock control switches
• Keyless entry keypad
• Integrated Keyhead Transmitter (IKT)
• BCM

Do you know what DTC'S are ?
DTC Charts
GO to Pinpoint Test H.B1218: 00Transmitter Identification Code: No Sub Type InformationGO to Pinpoint Test H.B121A: 11Keypad Illumination Output: Circuit Short to GroundGO to Pinpoint Test G.B121B: 01Keypad Input Switch: General Electrical FailureGO to Pinpoint Test F.B126A: 01Drivers Door Interior Lock Switch: General Electrical FailureGO to Pinpoint Test E.B130D: 00Memory Full for Integrated Key Programming: No Sub Type InformationThe maximum amount of IKTs (4) have been programmed into the BCM . Obtain all the customer's IKTs . Erase all the IKTs and program a maximum of 4.All other DTCs-REFER to the Diagnostic Trouble Code (DTC) Chart in Section 419-10.

Gremlins ! No ! You want to know how this is possible ? The ignition switch is a low voltage input to the BCM - body control module ! Going by which position you have the key in ACCY , ON , run or start . The BCM system will control relays to turn on power to different parts of the vehicle ! The place to start would be to hook up a professional type scan tool that can communicate with the BCM . Could have U codes stored in one or more of the modules on the vehicle ! Do you know what a power mode master PPM is , BCM !
BCM Functions
The body control module (BCM) performs multiple body control functions. The BCM can control devices directly connected to its outputs based on input information. The BCM evaluates this information and controls certain body control systems by commanding outputs on or off. The BCM control inputs can be:
• Sensors and switches that are directly connected to the BCM
• Class 2 serial data received from other vehicle systems connected to the class 2 serial data link.
The BCM is also capable of controlling other vehicle systems that are not directly wired to the BCM. The BCM does this by sending specific messages on the class 2 serial data link. The system capable of performing the required function will respond to the BCM message.

Your best bet would be to take your vehicle to a Buick dealer !
Power Mode Master
This vehicles BCM fuctions as the Power Mode Master (PMM). Refer to Power Mode Description and Operation for a complete description of power mode functions.

There are several parts to this system. Have the codes read. Security is built into the BCM. The BCM sends a signal to the ECM/PCM to start the car. Both of these have to be programmed, you can't just replace them. You have other parts also that can set security.

It's probably a bad input to the BCM - body control module ! Have it checked for DTC'S - diagnostic trouble codes .
The automatic door lock function can only be enabled by the body control module (BCM) if the driver door open switch and door ajar switches are in the Closed state. For information on programming the automatic door locks, refer to Vehicle Personalization in Personalization.
DTC B3064 or B3069
DTC B3127
DTC B3128, B3133, or B3138
DTC B3132
DTC B3137
DTC B3272
Your best bet , take it to the chevy dealer . Unless you own a GM factory Tech 2 scan tool an have access to factory sevice repair info.
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The outputs to the door lock actuators are controlled by the body control module (BCM). When the BCM receives a lock input from a door lock switch, or a keyless entry transmitter, it applies battery positive voltage to the door lock actuator lock control circuit, a ground to the door lock actuator unlock control, and the driver door lock actuator unlock control circuits. When the BCM receives an unlock input from a door lock switch, it applies battery positive voltage to the door lock actuator unlock control, the driver door lock actuator unlock control circuits, and a ground to the door lock actuator lock control circuit . When the BCM receives an single Unlock input from a keyless entry transmitter, it applies battery positive voltage to the driver door lock actuator unlock control circuit and a ground to the door lock actuator lock control circuit to unlock the driver door. A second Unlock input from the transmitter applies battery positive voltage to the door lock actuator unlock control circuit, and a ground to the door lock actuator lock control circuit to unlock the passenger doors.

This diagnostic procedure supports the following DTCs:
• DTC B3128 Left Front/Driver Door Unlock Circuit High
• DTC B3133 All Door Unlock Circuit High
• DTC B3138 All Door Lock Circuit High

You possibly need to reprogram the lock system to match your fobs.
If it unlocks by the interior switches then its the fob programming. This site is one example you can look for. http://www.chadspictures.com/automotive/How-To-Program-Toyota-Key-Fob/ If this is not the issue the computer that does the door locks could have died or you can look for the door lock fuse or a cut or pinched wire (due to other damage in an accident or from prior mods you did). Other possibilities include intermittent door solenoids if you can use the interior switch you can click it open and closed until you find the one that does not work every time. Change it out as it can leave your vehicle unlocked or it might interrupt the system. worst case it could be the chassis computer this site sells some http://www.automotix.net/usedautoparts/2008-toyota-sequoia-chassis_computer-product-i88489256n.html?gclid=CKfowo60gb8CFQQOaQodGqUArQ . If the shift lock system is screwed up it could be casing issues also but that's a long shot.

Given the amount of electronic's ( computers ) on your vehicle ,it could be a lot of thing's . Hooking up a factory or professional grade scan tool that can communicate with all the control modules on the vehicle should be the first step in the diagnostic problem . Checking for DTC'S - diagnostic trouble codes , communication between module errors etc.....
Your best bet , take it to a qualified repair shop that has the proper diagnostic equipment to check it out .
The power door lock system consists of the following components:
• Body control module (BCM)
• Driver door lock switch
• Front passenger door lock switch
• Door lock actuators in each of the doors
• Door lock system fuse into the BCM (BCM D 25A fuse)

BCM Functions
The body control module (BCM) is capable of accomplishing multiple body control functions. Components directly connected to the BCM are controlled by the BCM outputs. The BCM can control its outputs based on input information it obtains from sensors and switches that are directly connected to the BCM, or by receiving information from other vehicle systems connected to the class 2 serial data link. The BCM evaluates this information and controls certain body systems by commanding an output on or off.
The BCM is also capable of commanding other vehicle systems to control functions that are not directly wired to and/or controlled by the BCM. The BCM accomplishes this task by sending specific messages on the class 2 serial data link. The vehicle system capable of performing such function will respond to the BCM message.
The BCM controls/monitors the following functions:
• Audible warnings
• Indicators control
• Interior lighting
• Exterior lighting
• Power/automatic door locks
• Keyless entry
• Content theft deterrent
• Personalization
• Serial Power Modes
• Electrical Power Management

Buick Class 2 Operation Diagnosis 1998

This is a common problem with the Sequoia only thing is you have to get the dealer to repair this because it takes special diagnostic & calibrating equipment to do this .....

Transmitter Programming
If you lose a transmitter, program the old and new transmitter(s) into the remote control door lock receiver's memory. Up to 4 transmitters may be programmed.


Important
Once the remote control door lock receiver enters the programming/diagnostic mode, the programming of the first transmitter erases all previous transmitter programming information, requiring the programming of all transmitters.

Program only 1 vehicle remote control door lock receiver at a time. If more than 1 receiver is being programmed at the same time, it is possible that the same transmitter could be programmed to more than 1 remote control door lock receiver.


Perform the following steps in order to program the transmitter:

Remove the ignition key from the ignition lock cylinder.
Remove the BCM PRGRM fuse from the fuse panel. Refer to Fuse Block in Wiring Systems.
Close all of the doors.
Close the liftgate.
Turn the ignition lock cylinder to ACC.
Turn the ignition lock cylinder to OFF, and then back to ACC within 1 second.
Open and close any vehicle door. A chime will be heard when the system enters the BCM programming/diagnostic mode.

Important
After 7 seconds, a chime may be heard confirming successful synchronization. It is necessary to wait approximately 14 seconds for a second chime that will confirm successful programming.


Press and hold the transmitter LOCK and UNLOCK buttons simultaneously for 14 seconds.
Repeat the previous step on each additional transmitter to be programmed.
Remove the ignition key from the ignition lock cylinder.
Install the BCM PRGRM fuse back into the fuse panel. Refer to Fuse Block in Wiring Systems. IF THIS WAS HELPFUL,PLEASE RATE,THANK YOU

Keyless Entry System Circuit Description
The Power Door Locks/Remote Keyless Entry control system provides several functions. The driver operates the vehicle door locks and rear window release from outside the vehicle using a hand-held radio transmitter. The transmitter sends coded signals to the remote control door lock receiver. The remote control door lock receiver detects and decodes the signal from the transmitter. The remote control door lock receiver issues signals to the body control module (BCM) through a serial data link. The BCM actuates relays to lock and unlock the doors and liftgate. The BCM can also release the liftglass. The power door lock switches provide manual control of the door locks.


Transmitter Programming
Important: Different keyless entry systems are used on General Motors vehicles. The parts are not interchangeable even though the parts may appear to be similar. Observe the back of the transmitter in order to properly identify the system. On 1998 S/T pickups and utilities, use a transmitter identified with GM/UTA preceding the part number.
With the driver door closed, hold down the power unlock button on the door panel.
Turn the ignition switch to the ON position.
Turn the ignition switch to the OFF position.
Turn the ignition switch to the ON position.
Turn the ignition switch to the OFF position.
Release the power unlock button on the door panel.
The remote control door lock receiver will respond in the following manner in order to indicate that the receiver is in the programming mode:
6.1. Locking the doors
6.2. Unlocking the doors
Important: All extra transmitters must be programmed at this time. When a new transmitter is programmed, it will deactivate the old transmitters.
Hold down the lock and unlock buttons on the transmitter until the remote control door lock receiver will respond in the following manner:
7.1. Locking the doors.
7.2. Unlocking the doors.
Repeat step 7 for each additional transmitter.
Turn the ignition switch to the ON position in order to exit the transmitter programming mode.