Question about 1993 Toyota Camry V6

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I have a 2004 Camry with lumbar support in the driver´s seat. How much forward you have to adjust it to get it right? Do you have detailed instructions?. The owner´s manual has nothing about it.

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There is no particular position, you arrange it for your maximum comfort. 
It is recommended that when you stay normally in the seat the lumber support gently (as in just supports, not pushing or barely touching) supports you.

Posted on Aug 06, 2010

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Posted on Jan 02, 2017

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GMC Yukon Seat Switch


You don't mention what year your Yukon is ? This could very well be a control Module problem .
I'll post how the power memory seat's work or are suppose to work !

Memory Seats Description and Operation

Battery voltage is supplied to the memory seat module through a 25 A circuit breaker. The memory seat module supplies the seat adjuster switch assembly with a battery positive reference voltage. While the seat adjuster switches are in an inactive state the switch contacts are closed to the adjuster switch common circuit. When a seat adjuster switch is pressed to an active state the switch contact is closed to the reference voltage circuit. Battery voltage on a switch signal circuit indicates to the memory seat module the switch status is active. Each seat adjuster motor is controlled by the memory seat module through 2 motor control circuits. While the seat adjuster motors are in an inactive state the motor control circuits are closed to ground circuit contacts within the memory seat module. The memory seat module operates the seat adjuster motors by switching one of a motors control circuits to battery voltage. The seat adjuster motors are bidirectional and the direction of adjuster motor rotation is determined by which of the adjuster motor control circuits is switched to battery voltage while the other remains grounded.


Memory Set/Recall Operation
The seat adjuster motors are equipped with internal position sensors. The adjuster motor position sensors are monitored by the memory seat module and are used to determine the seat position when storing or recalling memory settings. The driver seat adjuster motors use potentiometer type position sensors. The position sensors are supplied with a 5 V reference and ground circuits from the memory seat module. The position sensor signal circuits return to an analog input within the memory seat module. During adjuster motor operation the position sensor provides a voltage change proportional to the change in revolution of the adjuster motor shaft. The memory seat module monitors the voltage from the position sensor signal circuits to determine the adjuster motor positions when storing or recalling memory seat position settings.
The memory recall switch assembly on the driver door provides inputs to the driver door lock/window switch. Battery voltage is supplied to the memory recall switch assembly from the driver door lock/window switch. When a RCL 1, RCL 2, or EXIT switch is pressed, the switch contacts close the appropriate switch signal circuit to the battery voltage supply circuit within the memory recall switch assembly. When the driver door lock/window switch receives active switch signals from the memory recall switch assembly, the appropriate commands are sent to the memory seat module using the GMLAN Serial Data circuit. The Body Control Module software version determines the personalization features available.
Memory seat recall operation is allowed only with the transmission selector lever in the PARK position while the ignition is on. The transmission selector lever position data is provided to the memory seat module by a message through the GMLAN Serial Data circuit.

There are somethings listed you are not familiar with , like GMLAN Serial Data circuit ,maybe Body Control Module software etc... GMLAN is a communincation network that the computers on the vehicle uses to share information , transmit commons etc... you can google it to read about it .

There are DTC'S - diagnostic trouble codes that can set in the module in control . Do you know what DTC'S are .

DTC Descriptors
DTC B1825 01: Driver Seat Recline Position Sensor Circuit Short to Battery
DTC B1825 06: Driver Seat Recline Position Sensor Circuit Short to Ground or Open
DTC B1825 5A: Driver Seat Recline Position Sensor Circuit Plausibility Failure
DTC B1850 01: Driver Seat Lumbar Horizontal Position Sensor Circuit Short to Battery
DTC B1850 06: Driver Seat Lumbar Horizontal Position Sensor Circuit Short to Ground or Open
DTC B1850 5A: Driver Seat Lumbar Horizontal Position Sensor Circuit Plausibility Failure
DTC B1860 01: Driver Seat Lumbar Vertical Position Sensor Circuit Short to Battery
DTC B1860 06: Driver Seat Lumbar Vertical Position Sensor Circuit Short to Ground or Open
DTC B1860 5A: Driver Seat Lumbar Vertical Position Sensor Circuit Plausibility Failure
DTC B2355 01: Driver Seat Front Vertical Position Sensor Circuit Short to Battery
DTC B2355 06: Driver Seat Front Vertical Position Sensor Circuit Short to Ground or Open
DTC B2355 5A: Driver Seat Front Vertical Position Sensor Circuit Plausibility Failure
DTC B2365 01: Driver Seat Rear Vertical Position Sensor Circuit Short to Battery
DTC B2365 06: Driver Seat Rear Vertical Position Sensor Circuit Short to Ground or Open
DTC B2365 5A: Driver Seat Rear Vertical Position Sensor Circuit Plausibility Failure
DTC B2375 01: Driver Seat Assembly Horizontal Position Sensor Circuit Short to Battery
DTC B2375 06: Driver Seat Assembly Horizontal Position Sensor Circuit Short to Ground or Open
DTC B2375 5A: Driver Seat Assembly Horizontal Position Sensor Circuit Plausibility Failure

5) Memory Seat Module is under the front of the driver seat , you could look under an see if all the connectors are fully seated.

The best diagnostic step would be to hook up the factory scan tool an see what the computer is seeing as far as inputs from the switch an outputs it's sending . I wouldn't suggest you take the seat apart an try testing electrical inputs etc.... unless you very familiar with automotive electrical systems an circuits .

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1 Answer

2003 Buick Regal: how do I hook up the front seat heating system? I think they're just disconnected. I can see all the wires under the driver's side seat. Neither the driver's side seat heater or seat...


The last time I checked one of these, the wiring harness for everything you just described is underneath the seat. You'll have to move the seat all the way forward or back to get to the harnesses to reconnect them.

I hope this helps! :) Let me know if you need any further assistance in this matter.

May 19, 2010 | 2003 Buick Regal

1 Answer

Hi - I have a much loved 2004 SAAB 93 Aero sedan.


This has been happenning on my 2006 Saab 9-3 2.0 T also for about 2-3 months also. I have had no clues until today I learnt by accident that the lumbar support on my car's driver seat does not work anymore. Which means that there are broken strings/wires inside the seat and that move on braking and make clicking sound. I haven't checked my seat's lumbar support but will do soon.

Try your lumbar support adjustment and see if it is moving freely, that means it not adjusting the lumbar support. If that's the case, that may be the cause of the clicking/slight-movement of the seat.

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2 Answers

Driver's seat stuck. Lumbard support works,


HI. There are only two causes for this particular issue. The most common will be a failed switch assembly. This should be located on the side of the drivers seat. This switch is responsible for transferring the movement commands to the actual motor/gear assembly, which is located on the rail structure under the seat in question. If your lumbar section is responding to commands, but the others fail, this will lead to a failed switch circuit. the entire switch board will need to be replaced, in this case.

Now, if you command the set to move forward, and all you hear is the motor running , but no movement, this will lead to a failed gear assembly. This will be the second cause of no forward/backwards movement. In this case, the entire motor/gear assembly will need to be replaced, due to the fact that the gears are not sold separately. The are shipped as a kit with the motor.


It is required that you order this type of replacement part directly from the dealership.



  • NOTE_ I have seen in most cases that the there was jam, due to pieces of the gear assembly breaking off, and jamming up the mechanism. in order to properly inspect for damage of this nature, it will be necessary to remove the seat.

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1 Answer

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some do some do not, on drivers side, approx. hip location, on side of seat, round control is located, press control for different positions of lumbar support

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1 Answer

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I wonder if you dont have a bad switch. I had a similar problem on my car except that it was the heated seats that would not engage... the power seat buttons all worked just fine. I changed the switch and it fixed the problem...

Note: this was on a BMW not a Murano

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1 Answer

Drivers seat lumbar.


erasy to reapi a seat just remove from vehicle and strip the covers off most are rachet and pawl but if you cant fix it get a welder and weld it into the optimum position that you want then replace the cushions and covers

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