Question about 1991 Honda Accord
The shift lock does not release when i step on the brake pedal
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)
Posted on Sep 25, 2009
My brake lights went out and I couldn't shift out of park without inserting key into shift lock release slot. After replacing the brake light switch (to no avail) as suggested by other posts, I checked the fuse panel under the hood. "Horn stop" fuse was blown. After replacing, problem was solved.
Posted on Dec 06, 2010
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Posted on Jan 02, 2017
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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
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The automatic transmission shift lock control switch.
The park/neutral position switch.
With the ignition in the ON position, battery positive voltage is supplied to the park/neutral position switch. When the transmission is in the PARK position the contacts in the park/neutral position switch are closed. This allows current to flow through the switch to the automatic transmission shift lock control switch. The circuit continues through the normally-closed switch to the automatic transmission shift lock control solenoid. The automatic transmission shift lock control solenoid is permanently grounded. This energizes the automatic transmission shift lock control solenoid, locking the shift linkage in the PARK position. When the driver presses the brake pedal the contacts in the automatic transmission shift lock control switch open, causing the automatic transmission shift lock control solenoid to release. This allows the shift lever to move from the PARK position.
Park Lock Solenoid
The park lock solenoid is a safety device that prevents an inadvertent shift out of PARK when the key is in the OFF position. The key must be in the RUN position to release the park lock solenoid. The system consists of the park lock solenoid. With the ignition in the ON position, voltage is supplied to the park lock solenoid. The park lock solenoid energizes through a permanent ground unlocking the shift lever. With the ignition in the OFF or ACCY position the park lock solenoid de-energizes and locks the shift lever in the park position.
Shift Lever Does Not Move with Brake Pedal Depressed
DEFINITION: Transmission shift lever will not move out of the PARK position with the ignition ON and the brake pedal pressed.
Did you perform the Symptoms - Automatic Transmission Shift Lock Control tests and all the necessary inspection?
Go to Step 2
Go to Symptoms - Automatic Transmission Shift Lock Control
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