Seat front passenger seat in my toyota matrix will not go down all the way. There is a tray table on the back that is not level unless the seat is all the way down.

Heated Seat System Operation
The driver and passenger heated seats have 2 heat zone operating modes with 3 heat level modes and will operate only while the engine is running. The heat zones are determined by which of the 2 heated seat buttons are pressed, while the heat level is determined by the number of times they are pressed. Pressing the seat cushion button 1 time will activate the seat back and cushion heater elements in the high mode. Each time the seat cushion button is pressed the seat back and cushion heat level is reduced from high to medium, low, and off. Pressing the heated seat back button 1 time will activate only the seat back heater element in the high mode. Each time the seat back button is pressed the seat back heat level is reduced from high to medium, low, and off. During heated seat operation the heat zone operating mode may be changed without affecting the current heat level mode.
The heated seat switches are momentary contact switches and are inputs to the driver and passenger door modules. Battery voltage is supplied to the switch assembly from the door module, and when a heated seat switch is pressed and released a brief switch signal voltage is supplied to the door module. Whenever the door module receives an active heated seat switch input, the next heated seat operating mode is determined by whatever the current mode may be. The seat heater elements are controlled by the driver seat module using inputs from the door modules through Class 2 serial data circuit messages. The driver seat module controls the voltage supply and the ground circuits to the seat heater elements. When a heated seat function is commanded active, the seat module will switch battery voltage to the heater element supply circuits, and ground is provided through low side drive control circuits. During heated seat operation both the seat back and cushion heater elements are supplied battery voltage. The seat module grounds the appropriate control circuits for back only or back and cushion heating modes, and opens or closes the active control circuits as necessary in order to maintain the desired seat temperature. The seat module relies on inputs from thermistors located in the driver and passenger seat backs to control heated seat temperatures. The thermistors are 2 wire sensors supplied with a 5-volt referenced signal circuit and a low reference circuit from the seat module. Resistance through the thermistors varies with temperature causing the heated seat sensor signal circuit voltage levels to decrease as the seat back temperatures rise. The seat modules allow heated seat operation only while the engine is running which is determined by a Class 2 serial data circuit message from the powertrain control module.

Heated Seat Components
The heated seat system consists of the following components:
• Driver and passenger heated seat switches
• Driver and passenger seat back heater elements
• Driver and passenger seat cushion heater elements
• Driver and passenger seat back temperature sensors
• Driver seat module
• Driver door module
• Passenger door module

Do you know what B - body DTC -diagnostic trouble code are ?
DTC B2425 Driver Seat Heater Circuit
DTC B2435 Driver Seat Back Heater Sensor Circuit
DTC B3941 Front Seat Heaters Circuit

Heated Seat Always On
Step
Action
Yes
No
Schematic Reference: Driver Seat Schematics and Passenger Seat Schematics
Connector End View Reference: Power Seat Connector End Views
1
Did you perform the Diagnostic System Check - Vehicle?
Go to Step 2
Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
Operate the heated seat system.
Does the system operate normally?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Go to Step 3
3
Install a scan tool.
Display the Heated Seat Status parameter in the driver seat module Input/Output data list.
Start the engine.
Does the scan tool display the Heated Seat Status parameter as Off?
Go to Step 6
Go to Step 4
4
Display the Heated Seat Mode parameter in the door module Inputs data list.
Does the scan tool display the Heated Seat Mode parameter as OFF?
Go to Step 6
Go to Step 5
5
Turn OFF the ignition.
Disconnect the heated seat switch connector to the door module.
Start the engine.
Does the scan tool display the Heated Seat Mode parameter as OFF?
Go to Step 7
Go to Step 8
6
Replace the driver seat module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Is the repair complete?
Go to Step 9
--
7
Replace the heated seat switch. Refer to Front Seat Heater Switch Replacement .
Is the repair complete?
Go to Step 9
--
8
Replace the door module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Is the repair complete?
Go to Step 9
--
9
Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 3


your best bet , have a qualified repair shop diagnose the problem

2 possible places L and R bottom of seat bolts or inbetween bottom and back bolts or straps inbetween seat and back simply pull up or push seat in LS and RS pull up and out

Check connections under passenger seat.
The SRSCM sets DTC B1322 if
there is any fault in Weight Classification System.



In contrast to the initial
one-stage airbag systems, newer restraint systems involve complex logic to
select, or alternatively suppress, various levels of safety system deployment.


Inherent to an advanced
Restraint System is the ability to discern information regarding passenger
occupancy.


It is intended that these
inputs be provided through the weight measuring OC system.


The object of such safety
system is to reduce the risk and level of injuries by automatically adapting the
airbag(s) and seat belt pretensioner to the driving status of the vehicle, its
occupants, and the crash severity.


The current OC system covered
in this specification continually senses and classifies the front passenger side
seat.


OCS is utilizing a robust
weight measuring technology. Thus, if any of the following conditions occur,
'command zero' and 'accuracy check' should be performed


The weight classification ECU
or any of the sensors is replaced.


The vehicle is brought to the
repair shop due to an accident or a crash even though the severity seems to be
minor.


The passenger airbag ON
indicator is off (not illuminated) when the passenger seat is not
occupied.


The passenger airbag ON
indicator is delayed more than 10 seconds before turning off when an adult
passenger is seated in the right front seat.


The passenger seat is removed
from the vehicle and re-assembled.


Any accessories (side table,
seatback table and seat cover, etc) are replaced or installed.

You have to unbolt the seat and then you can change the belt

Dipstick, oil filler , filter etc are under the passengers front seat.
If you lift the carpet immediately in front of the seat, you will see a pair of clips holding down the seat, unlatch them and lift the seat ( in some models they hide a clip in the centre console).
The brake fluid is under a cover in the dash.

I don't think you can. I owned a 07 EL 8 passenger, now i own a 08 EL 7 passenger and the floor hooks for the seats are located differently (the 8 passenger has an extra hook, if I remember correctly), so i don't think its possible, look at your manual and only shows how to move the seats.

Perhaps an item got caught under the seat and possibly affected the linkage wire between rail tracks.A small linkage wire trips the console side track.Without this,that particular track will not disengage.Look under the good working passenger side seat and you might notice this linkage wire.It will then give you an opportunity to see if it works well on the inop seat. You can pull that wire(or trip that linkage arm by hand if you are in a dilemma and need the seat moved in order to drive but use caution on these moving parts and dont get pinched.

the cable that runs from the seat to the motor is broken find a toyota dealer to check the cable.

I just bought a 2005 Tundra Limited and had the same problem. You will find the jack under the rear passenger seat. First you must pull the handle located on the sie of the seat centered between the back and seat protion and fold down the back part of the seat. Then pull the handle located near the bottom of the seat and close to the floor. Fold the rear seat over toward the front seat and you should have full view of the storage box in the floor containing the jack. I'm still looking for a manual for this vehicle,

You can normally unplug the sensor that is on the floor under the seat, either attached or close to seatbelt.