Question about 1997 Buick Century

2 Answers

Shift lever locked

Shift lever locks up sometimes, lever does not lock all the time, checked fuse but it is not blown.After several attemps to shift from park I 'am able to shift. Have notice when I pull fuse and put back in the lever does release but only for the one time. Is this something I can fix?

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Brake switch going bad or shift lock solenoid going bad. The brake switch controls the shift lock solenoid. When you press the brakes it releases the shift lock solenoid to allow movement of the shifter.

this is not on your car but it will give you an idea how the system works.

http://www.autoshop101.com/forms/AT12.pdf

Posted on Feb 19, 2009

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The problem is in the shift interlock.. as they get older the soienoid becomes unable to pull the linkage that locks the shifter in park ... you can try to adjust the you will see a spring on one end of it that has a slide lock holding it in place...if adjusting it wont help the you will need a new one from the dealer or salvage yard.

Posted on Feb 19, 2009

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2010 merc gm shift lever stuck in park car will start steering wheel turns


You have a shift interlock problem . What kind of vehicle ? a mercury what ?
Shift Interlock System
The shift interlock system prevents shifting from PARK unless the brake pedal is depressed. The shift interlock system consists of a shift lock actuator mounted on the selector lever. If the ignition switch is in the RUN position, the shift lock actuator is disabled when the brake pedal is depressed.
If the selector lever will not move out of PARK with the key in the ON position and the brake pedal depressed, it will need to be unlocked manually.
Do the brake lights work ?
Visually inspect for obvious signs of mechanical and electrical damage; refer to the following chart:

Visual Inspection Chart Mechanical Electrical
  • Damaged shift lock actuator
  • Damaged transmission control (TC) switch
  • Damaged shift interlock switch
  • Failed fuse(s):
    • F20 (10A)
    • F22 (15A)
  • Damaged wiring harness
  • Loose or corroded connections
  • Damaged shift interlock switch
Symptom Chart Condition Possible Sources Action
  • Shift interlock system does not release/lock correctly
  • Circuitry
  • Fuse(s):
    • F20 (10A)
    • F22 (15A)
  • Brake pedal position (BPP) switch
  • Brake shift interlock actuator
  • Brake shift interlock actuator module
  • Go To Pinpoint Test A .
PINPOINT TEST A: SHIFT INTERLOCK SYSTEM DOES NOT RELEASE/LOCK CORRECTLY Test Step Result / Action to Take A1 TEST THE BRAKE LIGHTS
  • Apply brake pedal and view brake lights.
  • Do brake lights illuminate?
Yes
GO to A7 .

No
GO to A2 . A2 TEST FUSE F22 (15A)
  • Key in OFF position.
  • Check fuse: Smart Junction Box (SJB) Fuse F22 (15A).
  • Is the resistance less than 5 ohms?
Yes
GO to A4 .

No
GO to A3 . A3 TEST THE CIRCUIT FOR A SHORT TO GROUND
  • Key in OFF position.
  • Disconnect: Brake Pedal Position (BPP) Switch.
  • Measure the resistance between pin 1 and ground.
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  • Is the resistance greater than 10,000 ohms?
Yes
GO to A4 .

No
REPAIR circuit for short to ground. TEST the system for normal operation
Do

Jun 19, 2016 | 2010 Mercury Grand Marquis

2 Answers

Will not come out of park. Button stuck


Automatic Transmission Shift Lock Control Description and Operation.
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
• The automatic transmission shift lock solenoid (serviced as the automatic transmission shift lock actuator), as well as the body control module (BCM) and the engine control module (ECM). The shift lock solenoid is located within the floor shift control assembly with vehicles equipped with floor shift.
• The BCM controls the voltage supply circuit of the shift lock control solenoid. The following conditions must be met before the BCM will supply voltage to the shift lock control solenoid.
The BCM controls the voltage to the shift lock control solenoid through the shift lock control solenoid controlled voltage circuit. The following conditions must be met before the BCM will supply voltage to the shift lock solenoid:
• The ignition is in the ON position.
• The ECM sends an input via GMLAN serial data to the BCM indicating the transmission is in the PARK position.
• The BCM determines the brake pedal is applied according the brake pedal position.
Since the shift lock control solenoid is permanently grounded, the BCM supplies voltage to the automatic transmission shift lock control solenoid, mechanically unlocking the shift lever allowing the driver to move the shift lever out of the PARK position as the solenoid energizes. When the brake pedal is not applied, the BCM turns the control voltage output of the shift lock control solenoid OFF, de-energizing the shift lock control solenoid. The de-energized solenoid mechanically locks the shift lever in the PARK position.
During remote start operation, the BCM will de-energize the shift lock control circuit, locking the shift lever in the PARK position.
Circuit/System Description
The body control module (BCM) controls the shift lock solenoid by providing battery voltage to the shift lock control solenoid. The BCM utilizes a smart driver to control the voltage supplied to the shift lock solenoid. The smart driver monitors the voltage and current flow of the control circuit.
Diagnostic Aids
• Use a scan tool to verify there are no brake pedal position sensor and/or transmission internal mode switch (IMS) DTCs set that could cause the BCM not to provide battery voltage to the A/T shift lock solenoid.
• If the automatic transmission shift lock control circuit is shorted to battery positive voltage, the A/T shift lock solenoid will be inoperative. The vehicle will shift out of PARK without depressing the brake pedal.
Your best bet is have it towed to a repair shop !

Feb 03, 2016 | 2008 Saturn Aura

1 Answer

Can't shift my Chevrolet Uplander out of park.


The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
?€¢
The automatic transmission shift lock control solenoid


?€¢
The body control module (BCM)


?€¢
The powertrain control module (PCM) or the transmission control module (TCM).

The BCM controls the voltage to the shift lock control solenoid through the shift lock control solenoid controlled voltage circuit. The following conditions must be met before the BCM will supply voltage to the shift lock solenoid:
?€¢
The ignition is in the ON position.


?€¢
The PCM / TCM sends an input to the BCM indicating the transmission is in the PARK position.


?€¢
The BCM determines the brake pedal is not applied according the brake pedal position.

Since the shift lock control solenoid is permanently grounded, the BCM supplies voltage to the automatic transmission shift lock control solenoid, mechanically locking the shift lever in the PARK position as the solenoid energizes. When the brake pedal is applied, the BCM turns the control voltage output of the shift lock control solenoid OFF, de-energizing the shift lock control solenoid. The de-energized solenoid releases the mechanical lock allowing the driver to move the shift lever out of the PARK position. When the transmission is out of the PARK position, the shift lock control solenoid remains de-energized.
The body control module (BCM) controls the A/T shift lock control solenoid by providing battery voltage to the A/T shift lock control solenoid. The BCM utilizes a smart driver to control the voltage supplied to the A/T shift lock control solenoid. The smart driver monitors the voltage and current flow of the control circuit.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B2705 Gearshift Unlock Circuit
You could have a bad brake light switch , automatic transmission shift lock control solenoid.
the BCM or wiring problem
Install a scan tool. Turn ON the ignition, with the engine OFF. Press and release the brake pedal several times while observing the BTSI solenoid parameter in the body control module (BCM) output data list

Jan 17, 2016 | Chevrolet Cars & Trucks

1 Answer

How do I get shifter out of park?


The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
?€¢
The automatic transmission shift lock control solenoid


?€¢
The body control module (BCM)


?€¢
The powertrain control module (PCM)

The BCM controls the voltage to the shift lock control solenoid through the shift lock control solenoid controlled voltage circuit. The following conditions must be met before the BCM will supply voltage to the shift lock control solenoid:
?€¢
The ignition is in the ON position.


?€¢
The PCM sends a class 2 message to the BCM indicating the transmission is in the PARK position.


?€¢
The BCM determines the brake pedal is not applied according to the stop lamp switch.

When the ignition is in the ON position, the ignition 1 fuse supplies voltage to the automatic transmission shift lock control solenoid as the BCM supplies a ground to the control circuit, mechanically locking the shift lever in the PARK position as the solenoid energizes. When the brake pedal is applied, the BCM turns the ground of the control circuit OFF, de-energizing the shift lock control solenoid. The de-energized solenoid releases the mechanical lock allowing the driver to move the shift lever out of the PARK position. When the transmission is out of the PARK position, the shift lock control solenoid remains de-energized.
Your best bet is to take it to the dealer ,may have DTC'S
DTC B2707 Gearshift Unlock Circuit Low
The body control module (BCM) controls the automatic transmission shift lock control solenoid by providing a controlled ground to the automatic transmission shift lock control solenoid. The BCM utilizes a smart driver to monitor the voltage and current flow of the automatic transmission shift lock control solenoid control circuit. DTC B2707 will set when the BCM detects a short to ground when the solenoid is in the OFF state.
DTC B2708 Gearshift Unlock Circuit High
Did you perform the Diagnostic System Check - Vehicle?
Go to Step 2
Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

  1. Turn ON the ignition, with the engine OFF.
  2. Press and hold the brake pedal.
  3. Attempt to move the shift lever out of the PARK position.
Does the shift lever move out of the PARK position?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Go to Step 3

3

  1. Turn OFF the ignition.
  2. Install a scan tool.
  3. Turn ON the ignition, with the engine OFF.
  4. Press and hold the brake pedal.
  5. With a scan tool, command the Brake to Shift Relay output control parameter On.
  6. Attempt to move the shift lever out of the PARK position.
Does the shift lever move out of the PARK position?
Go to Step 4
Go to Step 6

4

  1. With the scan tool, observe the Brake Switch parameter in the powertrain control module (PCM) data display list.
  2. Press and release the brake pedal several times while observing the scan tool.
Does the brake input display Applied and Released with the brake pedal operation?
Go to Step 5
Go to Diagnostic Starting Point - Lighting Systems in Lighting Systems

5

With the scan tool observe the TR Sw. parameter in the body control module (BCM) data list.
Does the scan tool indicate PARK position?
Go to Step 9
Go to Scan Tool Data List in Engine Controls - 3.4L

6

  1. Turn OFF the ignition.
  2. Disconnect the harness connector of the automatic transmission shift lock control solenoid.
  3. Turn ON the ignition, with the engine OFF.
  4. Press and hold the brake pedal.
  5. Attempt to move the shift lever out of the PARK position.
Does the shift lever move out of the PARK position?
Go to Step 7
Go to Step 8

7

Test the controlled ground circuit of the automatic transmission shift lock control solenoid for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 12
Go to Step 9

8

Inspect for poor connections as the harness connector of the automatic transmission shift lock control solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 12
Go to Step 10

9

Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 12
Go to Step 11

10

Replace the automatic transmission shift lock control solenoid. Refer to Shift Lock Control Solenoid Replacement .
Did you complete the replacement?
Go to Step 12
--

11

Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming.
Did you complete the replacement?
Go to Step 12
--

12

Operate the system in order to verify the repair.
Did you find and correct the condition?
System OK
Go to Step 3

Your best bet

Jan 11, 2016 | 2005 Chevrolet Equinox

2 Answers

This morning it started fine but will not come out of gear and my airbag light is on. Someone said it was the fuse but I am not sure which fuse. Any ideas ?


I am mechanic I really need to no more make ect. but it could be battery or the ignition switch or ignition lock n key but like I said need more information this is a guess that I told you

Oct 21, 2015 | 2008 Chevrolet Chevrolet TrailBlazer LT

1 Answer

Hi, I have a 96 windstar. One of the wires on the brake light switch down at the brake pedal has broke at the plug and then when I went to repair it touched the steering bar and sparks flew. Once I...


fuse #7 - 15 amp , Fuse #21 - 10 amp.

Maybe you blew solid state module. There is a manual bypass.

Shift Interlock System A shift interlock mechanism prevents shifting the transaxle out of the PARK position unless the brake pedal (2455) is applied. The shift lock actuator is energized when the ignition switch is turned to the RUN position.
  • This locks the shifter in the PARK position.
  • When the brake pedal is applied and the stoplight switch (13480) is activated, the shift lock actuator is deactivated and the shifter can be moved out of the PARK position.
-----------------------------------------------------
  • Shift Interlock System Does Not Release or Lock Properly
  • Fuse.
  • Circuit.
  • Shift lock actuator.
  • Gearshift lever adjustment.
  • Stoplight switch.

----------------------------------------------------------

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Oct 30, 2010 | 1996 Ford Windstar

2 Answers

My shifter locks when i've just turned the car on and try to shift from park to drive. It moves to the right a little bit, but will not move down into reverse. Ideas?


There may be a malfunction in the shift interlock sys.
This sys. keeps the shift from being moved from park
unless the brake peddle is depressed. There are 5 fuse's, directly or indirectly related to the interlock system. Fuse #6 15amp in the fuse box under the hood on the left side. The next 4 are in the fuse box
behind the left side of the dash. Fuse #3 15amp/fuse
#18 15amp/fuse #16 20amp and fuse #4 15amp.
Check these first, before you move on to the brake
light switch, under the dash at the brake peddle.
And the shift lock solenoid, under the console left of
the shift lever. Hope this helps.

Mar 22, 2010 | 2007 Subaru Forester 2.5X L.L. Bean...

1 Answer

My Maxima (2001) won't shift out of Park. The Shift Lock button doesn't work so we have removed the button and must use the end of a key inserted into the shift lock to get out of park. What needs to be...


Have you checked that the brake lamps work, if not then check the fuse. The shift lock is actuated by a lock lever in a motor, that is in the same system as the brake lamps. So, you can check the fuse and/or the brake lamp switch. Hope that helps

Feb 10, 2010 | 2001 Nissan Maxima

2 Answers

Shift lock parking break


ck if your brake lights are working, if not, ck the fuse. if fuse is good and brake lights work, could be problem with solenoid not unlocking the lever, there should be a bypass so you can get it into gear (small slot near shifer, put your key in there to release shifter)

Sep 25, 2009 | 1991 Honda Accord

3 Answers

Shifting problem


press on brake? if so, stil non op, check connection, loose off, if ok FUSE, or bad switch, brake light work ok?

Oct 05, 2008 | 2001 Ford F150 Styleside SuperCrew

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