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My mirrors wont adjust, the seat tilt wont stay,trunk sensor

My mirrors wont adjust, the seat tilt wont stay put and my trunk close sensor is messed up?

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Memory seats adjust on there own as well as mirrors


BCM has nothing to do with this function , MMM - memory mirror module !
Memory Mirror System Operation
The MMM is capable of storing mirror position for 2 different drivers. Mirror position is determined by both horizontal and vertical position sensors in each of the power mirrors. The MMM supplies a reference voltage and a low reference to these sensors and determines mirror position through the horizontal and vertical position signal circuits.
The MMM receives power through the battery supply voltage circuit and the MIR/LOCK fuse and a constant ground source. Any time that battery voltage is disconnected and then connected from the MMM, the MMM will enter the mirror relearn mode. The mirror relearn mode can also be commanded using a scan tool. Refer to Memory Mirror Module Learn for further information.The memory switch receives power through the battery supply voltage circuit and the MIR/LOCK fuse. The MMM upon receipt of a memory switch signal input, a class 2 message from the SIC or a class 2 message from the PCM indicating that the transmission is in park, will then supply battery voltage and ground to the appropriate power mirror motors through the mirror motor control circuits to move the mirrors to the predetermined positions.

DTC B1586, B1596, B1616, or B1626
The mirror horizontal and vertical position sensors are potentiometers. The Memory Mirror Module (MMM) provides these sensors with a 5 volt reference circuit and a low reference circuit. The MMM monitors the horizontal and vertical position sensor signal circuits which change values based on mirror position. These voltage values are used to determine mirror position and can be set into memory. When the MMM receives a memory recall request, the MMM will control the power mirror to the memory position based on the horizontal and vertical position sensor signal values.

Install a scan tool.
Turn ON the ignition, with the engine OFF.
With the scan tool, observe the mirror horizontal and vertical position parameters in the Memory Mirror Module (MMM) data list.
Operate both the left and right mirrors through the full range of movements.
Does the scan tool indicate that the left and right mirror horizontal and vertical position parameters are within the specified range?

Memory Seat System Components
The memory seat system consists of the following components:
• Power seat switch assembly
• Memory recall switch assembly
• Horizontal adjuster motor
• Front vertical adjuster motor
• Rear vertical adjuster motor
• Recline adjuster motor
• Memory seat module
• Memory mirror module
• SEAT 25A circuit breaker
• MIR/LOCK 3A fuse

Your best bet , take it to a qualified repair shop !

May 23, 2017 | 2002 Cadillac Escalade

1 Answer

I have a 2002 gmc envoy xl. the heat and seat and mirrors work fine, however every time i turn the car on or off the seat shifts all the way forward and the mirrors tilt in. to solve some of the...


Memory Seat System Components
The memory seat system consists of the following components:
• Power Seat Switch
• Seat Horizontal Motor
• Seat Front Vertical Motor
• Seat Rear Vertical Motor
• Seat Recliner Motor
• Driver Seat Module
• Memory Seat Switch

It's not the module , probably sensor supplying bad info to the module.

Memory Set/Recall Operation
The driver seat adjuster motors are equipped with potentiometer type position sensors used by the driver seat module to determine the seat position. The position sensors are supplied with 5-volt reference and ground circuits from the driver seat module. The position sensor signal circuits are referenced from ground within the driver seat module. The signal circuit voltage levels monitored by the driver seat module range from 0.39 - 4.58 volts and are determined by the wiper locations on the resistors within the motor position sensors. The position sensor circuit voltage levels are used by the driver seat module to determine the seat position when storing or recalling memory position settings.
The memory recall switch assembly on the driver's door provides inputs to the driver door module. Battery voltage is supplied to the memory recall switch assembly from the driver door module. When a memory recall 1, 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 module receives active switch signals from the memory recall switch assembly, the appropriate commands are sent to the driver seat module using the Class 2 Serial Data circuit.
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 driver seat module by a message through the Class 2 Serial Data circuit.

Your best bet , take it to a qualified repair shop and have it checked for DTC'S - diagnostic trouble codes .
Install a scan tool.
Observe the switch parameter for which the DTC has set in the seat module Inputs/Outputs data list.
Does the scan tool display Inactive?
DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820
DTC B1825, B1850, B1860, B2355, B2365, or B2375
The driver seat adjuster motors are equipped with potentiometer type position sensors used by the driver seat module to determine the seat position. The position sensors are supplied with 5-volt reference and ground circuits from the driver seat module. The position sensor signal circuits are referenced from ground within the driver seat module. The signal circuit voltage levels monitored by the driver seat module range from 0.39-4.58 volts and are determined by the wiper locations on the resistors within the motor position sensors. The position sensor circuit voltage levels are used by the driver seat module to determine the seat position when storing or recalling memory position settings.

$316.00 from doorman

Aug 15, 2017 | GMC Cars & Trucks

1 Answer

My trunk is stuck closed, Its not the remote it is the latch.. What can I do to get my trash out of the trunk and to make sure this doesn't happen again?


DO YOUR REAR SEAT LAY DOWN? IF SO YOU CAN GET IN THE TRUNK AND EMPTY IT OUT AND USE A LIGHT TO SEE IF SOMETHING IS CAUGHT IN THE LATCH...NOT SURE IF YOURS IS NEW ENOUGH TO HAVE A RELEASE INSIDE THE TRUNK BUT MAY HELP YOU OPEN IT

Dec 05, 2012 | 2007 Buick Lucerne CX

1 Answer

Location of fuse to control side mirrors on 2009 97x


Fuse panel in end of fascia
No. Amp. Function
1 15 Steering wheel lock
2 5 Steering column unit; ignition switch
3 10 Hands-free; cabin CD changer; SID
4 10 Main instrument unit; manual climate control;
automatic climate control (ACC)
5 7.5 Control module in front doors; Park Brake Shift Lock
(automatic transmission)
6 7.5 Brake light switch
7 20 Fascia fuse panel; fuel filler door
8 30 Control module in passenger front door
9 10 Fascia fuse panel
10 30 Trailer socket; electrical socket in storage compartment
between seats
11 15 Data link connection (diagnostics)
12 15 Interior lighting incl. glove compartment
13 30 Accessories
14 20 Radio, sound system I; control panel,
Infotainment System
15 30 Control module in driver's door
16 - -
17 - -
18 7.5 Manual climate control; fan
19 - -
20 7.5 Headlight levelling switch
21 7.5 Hands-free; brake light switch; manual climate
control; clutch pedal switch
22 30 Cigarette lighter
23 40 Cabin fan
24 7.5 Airbag control module
25 - -
26 5 Yaw sensor (cars with ESP)
27 - -


Trunk fuse panel, left-hand side
No. Amp. Function
1-5 MAXI -
6 30 Control module in left rear door
7 30 Control module in right rear door
8 20 Trailer
9 - -
10 30 Left-hand brake light; rear right turn signal; right tail
light; right reversing light; high-mounted brake light;
trailer lights
11 - -
12 - -
13 - -
14 - -
15 15 Seat heating, left seat
16 15 Seat heating, right seat
17 7.5 Autodimming rearview mirror; rain sensor; tire
pressure monitoring
18 15 Sunroof
19 7.5 Telematics (OnStar)
20 7.5 DVD player (navigation system)
21 7.5 Saab Parking Assistance (SPA); control module in
rear doors
22 30 Amplifier, sound system III
23 - -
24 10 Movement sensor; CD changer in trunk (accessory)
25 30 Electrically adjustable driver's seat with memory
26 30 Right-hand stop light; rear left turn signal; left tail
light; rear fog light; left reversing light; license plate
lighting; trunk lighting; trailer lights
27 - -
28 - -
29 - -

Fuse panel in front of battery
No. Amp. Function
1 60
MAXI
Secondary air injection pump (certain models)
2 20 Fuel pump; preheated oxygen sensors (lambda
probe)
3 10 A/C compressor
4 30 Main relay
Relays
1 Secondary air injection pump
2 A/C-compressor
3 Preheated oxygen sensors (lambda probe)
4 Main relay, engine (ECM/EVAP/injectors)

Sep 13, 2012 | 2006 Saab 9-7X

1 Answer

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 .

Mar 06, 2017 | GMC Cars & Trucks

1 Answer

My right mirror won,t keep memory whenever i set it same with my seat position


Position items,press set ,then #1 or #2

No owners manual ?

Helm.com --- to buy one

For mirrors you need to move the switch to the side you want

Jul 09, 2012 | 2004 Lincoln Aviator

1 Answer

Trunk wont stay shut


the piece on the body wants adjusting

Apr 01, 2010 | Ford Thunderbird Cars & Trucks

1 Answer

I have a 2005 Jeep Grand Cherokee Limited. My drivers side front power seat does Not stay adjusted. Every time I turn the ignition on the seat moves backward and the back lays down.


The limited edition brings memory setting for mirrors and seats, it recognizes which key are you putting in the ignition and puts the saved setting accordingly to that driver's key. That is the reason your seat keeps moving. You need to reprogram the seat position for that key. Good luck

Dec 30, 2009 | 2005 Jeep Grand Cherokee

1 Answer

Boot lid wont stay shut and it shows it open on the instrument panel, it shuts but still shows it as open and then pops open when you are driving


try cleaning the lock itself then lubricating it and work the { boot / trunk }until it works in a bit ...does it appear as if it needs an adjustment ..as you close it do the lock and the striker match up within a reasonable catch distance otherwise an adjustment can be made .

the light will stay on if the switch does not make the necessary closed position allowing the circuit to remain open .again this would require an adjustment

has the vehicle been in an accident or the trunk disturbed to cause this ?

if not perhaps the switch itself needs an adjustment or is worn can the switch plate be lowered by bending the plate or can you adjust it otherwise .

Dec 22, 2009 | 2005 Volkswagen Passat

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