B2708

DTC B2708

Circuit Description
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 B2708 will set when the BCM detects a short to voltage when the automatic transmission shift lock control solenoid is active.

Conditions for Running the DTC
^ The ignition switch is in the ON position.
^ The brake pedal is released.
^ The transmission the PARK position.

Conditions for Setting the DTC
The BCM detects a short to voltage at the control circuit driver of the automatic transmission shift lock control solenoid for a minimum of 1 second.

Action Taken When the DTC Sets
^ The BCM disables shift lock control solenoid operation until the next key cycle.
^ The security light, service light and MIL lamp are always ON with the ignition OFF.

Conditions for Clearing the DTC
^ A current DTC B2708 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 A/T shift lock control circuit is shorted to battery positive voltage, the automatic transmission shift lock control solenoid will be unlocked. The vehicle will shift out of PARK without pressing the brake pedal.
^ Perform the tests while wiggling the wires and connectors. This may often cause an intermittent malfunction to appear. Refer to Testing for Intermittent and Poor Connections.

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 the control circuit of the automatic transmission shift lock control solenoid.

Steps 1 - 9:

DTC B2708