I have a 2001 Impala, After replacing the drivers side window switch and a battery. My power door locks quit working. I have power at the fuse, and it is good. After reading a similar problem in this forum, Could my BCM (body control module) have went out. If so can only a certain function go out. From what I understand a BCM contols a variety of functions. Any thoughts would be greatfully appreciated. Thank

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"nsmithjr" <nsmithjr.22jsgi (AT) no-mx (DOT) carstalk.net> wrote

is good. After reading a similar problem in this forum, Could my BCM (body
control module) have went out. If so can only a certain function go out.
From what I understand a BCM contols a variety of functions. Any thoughts
would be greatfully appreciated. Thanks
Ummmmmmm..... you did some work inside the door panel - on the switches, and
now one of the other switches does not work. And, you're looking everywhere
else for a problem? How about taking the panel back off and looking to see
if you inadvertently dislodged the door lock switch. or perhaps damaged
something else in the process of replacing the window switch? Unless there
is more that you didn't state, it seems kind of obvious where to start.

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-Mike-
mmarlowREMOVE (AT) alltel (DOT) net

Thanks for replying. Yes I did take the panel back off. Did not find anything out of the ordinary. I checked for power at the door lock switch and there wasn't any. The fuse is still intact and there is power at the fuse block. Also neither pow. door lock functions. Also the locking option doen't work when you, put the car into gear. Anymore suggestions would be helpful. Thanks again

Nea

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nsmithjr

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Perhaps this description from the service manual will give you some insight.
The schematic suggests that you will not ever read voltage on the lock
switches in the door. These put a ground on the appropriate BCM input when
pushed.

Document ID# 698343
2001 Chevrolet/Geo Impala
--------------------------------------------------------------------------------
Power Door Locks Description and Operation

Power Door Locks System Components

The power window system consists of the following components:

Body control module (BCM).
Driver door lock cylinder switch.
Front passenger door lock cylinder switch.
Driver door lock switch.
Front passenger door lock switch.
Door lock actuators in each of the doors.
DR LK Fuse 20-amp.

Door Lock System Controls

The Power Door Lock System is controlled by the body control module (BCM)
and can be activated by any one of the following:

A door lock switch lock or unlock actuation.
A door lock cylinder switch unlock actuation.
A keyless entry transmitter actuation.
An automatic door lock actuation (Personalization function).
An automatic door unlock actuation (Personalization function).
A last door closed locking (LDCL) actuation (Personalization function).

Door Lock Operation

When the body control module (BCM) detects a transition of either of the
door lock switches to the lock position, it switches the door lock actuator
lock control circuit to voltage. Since the lock actuator unlock control
circuits are at ground potential within the BCM, the door lock actuator
motors transition to the lock position.

Driver Door Unlock Operation

When the body control module (BCM) detects a transition of either of the
door lock switches to the unlock position, it switches the driver door lock
actuator unlock control circuit to voltage. Since the door lock actuator
lock control circuit is at ground potential within the BCM, the left front
(LF) door lock actuator motor transitions to the Unlock position.

The driver door lock actuator unlock control circuit is a dedicated control
circuit used only for the driver door lock actuator motor. This is done so
that the driver door may be unlocked by itself using a keyless entry
transmitter or an automatic door unlock function (if programmed).

Passenger Door Unlock Operation

When the body control module (BCM) detects a transition of either of the
door lock switches to the unlock position, it switches the door lock
actuator unlock control circuits to voltage. Since the door lock actuator
lock control circuit is at ground potential within the BCM, the passenger
door lock actuator motors transition to the unlock position.

The door lock actuator unlock control circuits are dedicated control
circuits used only for the passenger door lock actuator motors. This is done
so that the driver door may be unlocked separate from the passenger doors
using a keyless entry transmitter or an automatic door unlock function (if
programmed).

Lockout Prevention
This function is intended to prevent the vehicle operator from locking the
doors if the key is left in the ignition and any vehicle door is open. The
body control module (BCM) will react after locking all the doors by
unlocking the driver door. The lockout prevention function can be overridden
by manually locking the door.

Key Cylinder Unlock
The body control module (BCM) will provide unlocking of all the doors when
either the driver or front passenger key cylinder switch is actuated to the
unlock position for longer than one second.

Automatic Door Lock/Unlock
The automatic door lock/unlock function is a Vehicle Personalization feature
with the following four programmable modes of operation:

The automatic door lock feature is disabled.
All of the doors lock when the vehicle is shifted out of Park with the
ignition ON.
All of the doors lock when the vehicle is shifted out of Park with the
ignition ON, and only the driver door Unlocks when the vehicle is shifted
into Park.
All of the doors lock when the vehicle is shifted out of Park with the
ignition ON, and all of the doors Unlock when the vehicle is shifted into
Park.
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.

Air Bag Deployment Unlock
The body control module (BCM) will provide unlocking of all the doors 15
seconds after determining the air bags have been deployed.

"nsmithjr" <nsmithjr.22ktmh (AT) no-mx (DOT) carstalk.net> wrote

Could you please tell me where I can find the Vehicle Personalization. When I changed the battery or window switch, I may have somehow disabled the door function. Thanks for you help

Nea

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Don't know if that information is in the owner's manual or not but here is
what the service manual has. Unfortunately, it appears that a scanner is
required for some functions:

Document ID# 682494
2001 Chevrolet/Geo Impala
--------------------------------------------------------------------------------
Vehicle Personalization
Programming Features
Enter Programming Mode
Perform the following steps in order to enter the programming mode:

Press the DISP button on radio for at least 10 seconds.
Press the SEEK button to scroll through the menu.
Delayed Headlamp Illumination
Continue with the following steps in order to personalize the delayed
headlamp illumination feature:

Scroll through the menu, using the SEEK button, until LT DELAY is displayed.
Press the DISP button to enter the menu.
Press the PREV or NEXT button to scroll through the following options:
DISABLED
30 SEC
60 SEC
RETURN
Press the DISP button in order to choose the desired option. A chime will
sound to verify the setting.
Automatic Door Locks
Continue with the following steps in order to personalize the automatic door
locks feature:

Scroll through the menu, using the SEEK button, until AUTOLOCK is displayed.
Press the DISP button to enter the menu.
Press the PREV or NEXT button to scroll through the following options:
OFF
LCK ONLY
DRVR UNL
ALL UNL
Press the DISP button in order to choose the desired option. A chime will
sound to verify the setting.
Remote Activation Verification
Continue with the following steps in order to personalize the remote
activation verification feature:

Scroll through the menu, using the SEEK button, until FOBLIGHT is displayed.
Press the DISP button to enter the menu.
Press the PREV or NEXT button to scroll through the following options:
OFF
ON
Press the DISP button in order to choose the desired option. A chime will
sound to verify the setting.
Exit to the MAIN MENU.
Scroll through the menu, using the SEEK button, until FOBHORN is displayed.
Press the DISP button to enter the menu.
Press the PREV or NEXT button to scroll through the following options:
OFF
PARTIAL
FULL
Press the DISP button in order to choose the desired option. A chime will
sound to verify the setting.
Content Theft Deterrent
Continue with the following steps in order to personalize the content theft
deterrent options:

Scroll through the menu, using the SEEK button, until ALARM is displayed.
Press the DISP button to enter the menu.
Press the PREV or NEXT button to scroll through the following options:
OFF
ON
Press the DISP button in order to choose the desired option. A chime will
sound to verify the setting.
Exit to the MAIN MENU.
Scroll through the menu, using the SEEK button, until TRNKJAMB is displayed.
Press the DISP button to enter the menu.
Press the PREV or NEXT button to scroll through the following options:
OFF
ON
Press the DISP button in order to choose the desired option. A chime will
sound to verify the setting.
Horn Chirp Timer
Continue with the following steps in order to personalize the duration of
the horn chirp when the remote keyless transmitter is used:

Scroll through the menu, using the SEEK button, until CHIRP is displayed.
Press the DISP button to enter the menu.
Press the PREV or NEXT button to scroll through the following options:
SHORT -- Short Chirp (16 msec)
LONG -- Long Chirp (32 msec)
Press the DISP button in order to choose the desired option. A chime will
sound to verify the setting.
Exit Programming
Continue with the following steps in order to exit the programming mode:

Press the SEEK button to scroll to the end of the MAIN MENU until EXIT is
displayed.
Press the DISP button to exit the MAIN MENU.
Programming Features with the Tech 2
To enter programming with the Tech 2 , perform the following actions:

Install the scan tool.
Turn ON the ignition with the engine OFF.
Select the correct vehicle and model year.
Select Body.
Select Personalization.
Delayed Headlamp Illumination
Continue with the following steps in order to program the Delayed Headlamp
Illumination feature:

Select Set Options.
Select F0 for Delayed Headlamp Illumination mode.
Highlight the desired mode from the following choices:
Mode 1: OFF.
Mode 2: 30 seconds.
Mode 3: 60 seconds.
Press the ENTER button to turn the mode ON or OFF. (You must turn the
current mode OFF before you can turn another one ON.)
Select Save Options.
Exit the menu.
Automatic Door Lock
Continue with the following steps in order to program the Automatic Door
Lock feature:

Select Set Options.
Select F1 for Automatic Door Lock Mode.
Highlight the desired mode for the following choices:
OFF.
ADL out of Park.
Unlock Drivers Door Only.
Unlock All Doors
Press the ENTER button to turn the mode ON or OFF. (You must turn the
current mode OFF before you can turn another one ON.)
Select Save Options.
Exit the menu.
Remote Visual Verification Mode
Continue with the following steps in order to program the Remote Unlock
Verification Mode:

Select Set Options.
Select F2 for Remote Visual Verification Mode.
Highlight the desired mode for the following choices:
OFF.
ON.
Press the ENTER button to turn the mode ON or OFF. (You must turn the
current mode OFF before you can turn another one ON.)
Select Save Options.
Exit the menu.
Remote Audible Verification Mode
Continue with the following steps in order to program the Remote Audible
Verification Mode:

Select Set Options.
Select F3 for Remote Audible Verification Mode.
Highlight the desired mode for the following choices:
OFF
PARTIAL
FULL
DRL and Horn
Press the ENTER button to turn the mode ON or OFF. (You must turn the
current mode OFF before you can turn another one ON.)
Select Save Options.
Exit the menu.
Content Theft Deterrent
Continue with the following steps in order to program the CTD (Content Theft
Deterrent System):

Select Set Options.
Select F4 for CTD Program Mode
Highlight the desired mode for the following choices:
OFF
ON
Press the ENTER button to turn the mode ON or OFF. (You must turn the
current mode OFF before you can turn another one ON.)
Select Save Options.
Exit the menu.
CTD Shock Sensor
Continue with the following steps in order to program the CTD Shock Sensor.

Select Set Options.
Select F5 for CTD Program Mode
Highlight the desired mode for the following choices:
OFF
ON
Press the ENTER button to turn the mode ON or OFF. (You must turn the
current mode OFF before you can turn another one ON.)
Select Save Options.
Exit the menu.
CTD Trunk Switch
Continue with the following steps in order to program the CTD Trunk Switch.

Select Set Options.
Select F6 for CTD Program Mode
Highlight the desired mode for the following choices:
OFF
ON
Press the ENTER button to turn the mode ON or OFF. (You must turn the
current mode OFF before you can turn another one ON.)
Select Save Options.
Exit the menu.
Horn Chirp Mode
Continue with the following steps in order to program the Horn Chirp Mode.

Select Set Options.
Select F7 for Horn Chirp Mode.
Highlight the desired mode for the following choices:
Short Chirp
Long Chirp
Press the ENTER button to turn the mode ON or OFF. (You must turn the
current mode OFF before you can turn another one ON.)
Select Save Options.
Exit the menu.
Police Option (RPO A98)
Continue with the following steps in order to program the Police Option
Mode:

Select Set Options.
Select F8 Police Option Mode.
Highlight the desired mode for the following choices:
NO
YES
Press the ENTER button to turn the mode ON or OFF. (You must turn the
current mode OFF before you can turn another one ON.)
Select Save Options.
Exit the menu.
Trap Alert System
Continue with the following steps in order to program the Trap Alert System:

Select Set Options.
Select F9 Trap Alert System.
Highlight the desired mode for the following choice:
ENABLE
Press the ENTER button to turn the mode ON or OFF. (You must turn the
current mode OFF before you can turn another one ON.)
Select Save Options.
Exit the menu.
Additional Information
For more information about the personalization features, refer to one of the
following description and operations:

Refer to Content Theft Deterrent (CTD) Description and Operation in Theft
Deterrent for more information about the content theft deterrent features.
Refer to Power Door Locks Description and Operation in Doors for more
information about the automatic door lock feature.
Refer to Interior Lighting Systems Description and Operation in Lighting
Systems for more information about the delayed headlamp illumination
feature.
Refer to Keyless Entry System Description and Operation in Keyless Entry for
more information about remote activation verification.

--------------------------------------------------------------------------------
Document ID# 682494
2001 Chevrolet/Geo Impala

"nsmithjr" <nsmithjr.22n8c3 (AT) no-mx (DOT) carstalk.net> wrote

Thank You for all your insite, on my problem. I did try the setting for the Autolock on my car stereo., and no luck. I have tried this methed before to no luck. The information is in the manual, under the Theft Deturrent section. I also re-checked all the fuses that go to the BCM, and replaced them all, and no luck. The power locks still don't operate. Any more insite would be great, Thanks again

Nea

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On 2/4/06 8:53 PM, in article nsmithjr.22r4qh (AT) no-mx (DOT) carstalk.net, "nsmithjr"
<nsmithjr.22r4qh (AT) no-mx (DOT) carstalk.net> wrote:

If you can't hear it trying to do anything I would suspect a relay (odds are
that the connection from both switches wouldn't be compromised..

Do you have any ideal where I might find the relay ? Thanks for you comment

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