Question about 1997 Buick Century

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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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94 merc grandmarkee wont go into park wont start will start if you wiggle in nutral


Park neutral safety switch could be bad , also the shift interlock safety system .
Shift Interlock System A brake/shifter interlock system consists of the following:
  • ignition switch (11572)
  • brake pedal stoplight switch (13480)
  • brake shift interlock module
  • brake shift interlock solenoid assembly (attached to key interlock assembly)
  • necessary wiring
On floor-shift vehicles, the ignition/shifter interlock cable (3F719):
  • locks the floor shift transaxle range selector lever in the PARK position when the ignition switch is in the LOCK position.
  • requires the floor shift transaxle range selector lever to be in the PARK position to turn the ignition switch to the LOCK position.
Condition Possible Source Action
  • Shift Interlock System Does Not Release or Lock Properly
  • Circuitry open/shorted.
  • Blown fuse.
  • Damaged stoplight switch.
  • Damaged shift lock actuator.
  • GO to Pinpoint Test A .

PINPOINT TEST A: SHIFT INTERLOCK SYSTEM DOES NOT RELEASE OR LOCK PROPERLY A1 CHECK ELECTRON IGN FUSE
  • Check Fuse 5 (5A) located in fuse junction panel.
Is fuse OK?
Yes No GO to A3 . GO to A2 . A2 CHECK FOR SHORT TO GROUND
  • Turn ignition switch OFF.
  • Remove Fuse 5 (5A).
  • Disconnect shift-lock actuator connector C203 located to the right of steering column.
  • Measure resistance of the Circuit 1003 (GY/Y) between the correct terminal of Fuse 5 (5A) and ground.
Is resistance greater than 10,000 ohms?
Yes No REPLACE Fuse 5 (5A). GO to A3 . SERVICE Circuit 1003 (GY/Y) wire between fuse junction panel and shift-lock actuator. A3 CHECK POWER SUPPLY FROM FUSE 5 (5A)
  • Reinstall Fuse 5 (5A).
  • Turn ignition switch to RUN.
  • Measure voltage on Circuit 1003 (GY/Y) wire and ground.
Is voltage greater than 10 volts?
Yes No GO to A4 . SERVICE Circuit 1003 (GY/Y) wire between interior fuse panel and shift-lock actuator. A4 CHECK POWER SUPPLY FROM FUSE 28 (15A)
  • Turn ignition switch OFF.
  • Disconnect connector C2016.
  • Turn ignition switch ON.
  • Measure voltage on Circuit 10 (LG/R) and ground.
Is voltage B+?
Yes No GO to A5 . SERVICE Circuit 10 (LG/R) for open. RESTORE vehicle and RETEST system. A5 CHECK WIRE BETWEEN STOPLIGHT SWITCH AND SHIFT-LOCK ACTUATOR
  • Turn ignition switch OFF.
  • Disconnect shift-lock actuator connector C203.
  • Apply brake pedal.
  • Measure voltage on Circuit 810 (R/LG) wire and ground.
Is voltage greater than 10 volts with brake pedal applied and less than 1 volt with brake pedal released?
Yes No GO to A6 . SERVICE Circuit 810 (R/LG) wire between stoplight switch and shift-lock actuator. A6 CHECK SHIFT-LOCK ACTUATOR GROUND
  • Measure resistance of Circuit 57 (BK) and ground.
Is resistance less than 5 ohms?
Yes No REPLACE shift-lock actuator. SERVICE BK wire.

Mar 30, 2017 | Cars & Trucks

1 Answer

2005 cts won't sift out of park, press the brake pedal and start the car, just won't shift out of park


You probably have a problem with

Automatic Transmission Shift Lock Control System
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 brake switch
• The rear integration module (RIM)
• The transmission control module (TCM) or powertrain control module (PCM)
With the ignition ON, battery positive voltage is supplied to the automatic transmission shift lock control solenoid from the ignition 3 relay. The automatic transmission shift lock control solenoid is controlled by the rear integration module. When the rear integration module (RIM) receives a class 2 serial data message from the transmission control module (TCM) or powertrain control module (PCM) indicating that the shift lever is in the PARK position the rear integration module (RIM) grounds the automatic transmission shift lock control solenoid control circuit. This causes the solenoid to energize mechanically locking the shift lever in the PARK position. When the driver presses the brake pedal the rear integration module receives the brake applied signal and turns off the ground to the automatic transmission shift lock control solenoid control circuit. This allows the shift lever to be moved out of the PARK position.

Shift Lever Does Not Move with Brake Pedal Depressed

2
Apply the parking brake and block the wheels.
Turn ON the ignition, with the engine OFF.
Attempt to move the shift lever out of the PARK position.
Does the shift lever move out of the PARK position?
YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
NO - Go to Step 3
3
Turn OFF the ignition.
Install a scan tool.
Turn ON the ignition, with the engine OFF.
With a scan tool, observe the TCC brake switch parameter in the transmission data display list.
Press and release the brake pedal several times.
Does the TCC brake switch status turn ON and OFF with the brake pedal?
YES - Go to Step 4
NO - Go to Stop Lamps Inoperative in Lighting Systems
4
With a scan tool, observe the brake to shift control parameter in the rear integration module data list.
Press and release the brake pedal several times.
Does the brake to shift control status turn ON and OFF with the brake pedal?
YES - Go to Step 5
NO - Go to Step 8
5
Turn OFF the ignition.
Connect a test lamp between the automatic transmission shift lock control solenoid supply voltage circuit and the automatic transmission shift lock control solenoid control circuit at the automatic transmission shift lock control solenoid.
Turn ON the ignition, with the engine OFF.
With a scan tool, command the brake to shift control ON and OFF several times while observing the test lamp.
Does the test lamp turn ON and OFF with each command?
YES - Go to Step 7
NO - Go to Step 6
6
Test the automatic transmission shift lock control solenoid control circuit for and open or short to battery voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 11
NO - Go to Step 8
7
Inspect for poor connection at 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?
YES - Go to Step 11
NO - Go to Step 9
8
Inspect for poor connections at the harness connector of the rear integration module (RIM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Yes - Go to Step 11
NO - Go to Step 10
9
Replace the automatic transmission shift lock control solenoid. Refer to Automatic Transmission Shift Lock Actuator Replacement .
YES - Did you complete the replacement?
NO - Go to Step 11
--
10
Replace the RIM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
YES - Did you complete the replacement?
NO - Go to Step 11
--
11
Operate the system in order to verify the repair.
Did you find and correct the condition?
YES - System OK
NO - Go to Step 2

Mar 25, 2017 | Cadillac CTS Cars & Trucks

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

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

Key stuck in the ignitin of a 2005 grand prix


Check to be sure your shift lever is all the way in the Park position. Move it up and down several times to be sure. If that doesn't work shift into neutral then move steering wheel side-to-side to be sure it isn't locked under tension. Place shifter back into Park position. If that doesn't work check all your fuses. There is a small safety switch located under the shifter boot. It is there to prevent the car from starting when not in Park. A blown fuse can cause it to stop working. If all else fails, remove boot and manually press this switch. If key comes out then that's your problem. Good luck.

Mar 10, 2013 | Cars & Trucks

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

2000 Taurus starts just fine. Transmission stuck in park. Cannot shift. I do have foot on brakes.


When you push on the brake pedal with the ignition key in the run position, do you here or feel a clicking noise at the shifter?

There are also (2) fuses in the interior fuse box ( #17 and #32) that must be checked to make sure they are not blown. If the fuses are good, I would suspect either the brake switch or shift interlock solenoid.

The fuse supplies ignition voltage to the brake switch, when the brake is applied, the switch closes and voltage travels to the shift interlock solenoid. The solenoid is activated and the shift lever is unlocked.

So, it may be one of several things causing the problem.
1) blown fuse.
2) brake switch defective
3) shift inter lock solenoid defective.
4) wiring harness or connector problem.

Oct 09, 2009 | 2000 Ford Taurus

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