B2705
DTC B2705DTC B2705 Step 1 - 4:
DTC B2705 Step 5 - 12:
Circuit Description
The Body Control Module (BCM) controls the automatic transmission shift lock control solenoid by providing battery voltage to the automatic transmission shift lock control solenoid. The BCM utilizes a smart driver to control the voltage supplied to the automatic transmission shift lock control solenoid. The smart driver monitors the voltage and current flow of the control circuit.
Conditions for Running the DTC
- The ignition switch is in the ON position.
- The brake pedal is depressed.
- The transmission the PARK position.
Conditions for Setting the DTC
The BCM output driver detects an open or short in the output control circuit.
Action Taken When the DTC Sets
The BCM disables the output control until the next ignition cycle.
Conditions for Clearing the DTC
- A current DTC B2705 will clear when the malfunction is no longer present and the ignition switch is cycled.
- All BCM history codes will clear after 100 ignition cycles with no current codes active during the 100 ignition cycles.
Diagnostic Aids
- If the automatic transmission shift lock control circuit is shorted to battery positive voltage, the automatic transmission shift lock control solenoid will be inoperative. The vehicle will shift out of PARK without depressing the brake pedal.
- Perform the tests while wiggling the wires and connectors. This may often cause an intermittent malfunction to appear.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. Listen for an audible click when the automatic transmission shift lock control solenoid operates. Command both the ON and OFF states. Repeat the commands as necessary.
3. Tests for voltage at the ignition 1 voltage circuit of the automatic transmission shift lock control solenoid.
4. Verifies that the BCM is providing a ground to the automatic transmission shift lock control solenoid.
5. Tests if ground is constantly being applied to the automatic transmission shift lock control solenoid.