This advice is for Kenmore Elite and Whirlpool Duet front loader washers and dryers with a Control Lock problem.
This may or may not be an indication of a serious problem. In the majority of the cases, this is a simple operator error. Nearly all these model appliances have some sort of Control Lock feature on the front panel now. This is a designed safety feature that is used to prevent small children from manipulating the controls. The controls can be easily locked or unlocked by pressing and holding the following button on the front panel:
Whirlpool Duet Washer - Press and hold the END OF CYCLE SIGNAL button for 3 seconds.
Whirlpool Duet Dryer - Press and hold the END OF CYCLE SIGNAL button for 3 seconds.
Kenmore Elite Washer - Press and hold the DRAIN/SPIN button for 3 seconds.
Kenmore Elite Dryer - Press and hold the AUTO DRY LEVEL button for 3 seconds.
These instructions may not be all inclusive for all Kenmore and Whirlpool models, but they are the most common. Chances are, if you have a Control Lock feature, the instructions will be printed on the front panel adjacent to the button that is required to lock or unlock the controls.
NOTE: These instructions may also work for newer model Maytag, Hotpoint, Admiral and Frigidaire model front loaders as well. Refer to your owner's manual or front panel for instructions pertaining to your specific model.
If the Control Lock feature will not lock or unlock the appliance, unplugging the unit for AT LEAST 30 minutes is recommended in order to reset the main control board. In many cases this is all that is required to correct momentary glitches.
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The body control module (BCM)
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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:
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The ignition is in the ON position.
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The PCM / TCM sends an input to the BCM indicating the transmission is in the PARK position.
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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
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