B2708
DTC B2708
Circuit Description
The body control module (BCM) controls the automatic transmission shift lock control solenoid by providing controlled voltage 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 inactive.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B2708 Gearshift Unlock Circuit High
Conditions for Running the DTC
* The ignition switch is in the ON position.
* The shift lock control solenoid is inactive.
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.
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 voltage control circuit of the automatic transmission shift lock control solenoid is shorted to battery positive voltage, the shift lever will be locked in the PARK position.
* Perform the tests while wiggling the wires and connectors. This may often cause an intermittent malfunction to appear. Refer to Testing for Intermittent Conditions and Poor Connections in Diagnostic Aids in Diagnostic Aids. Component Tests and General Diagnostics
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.
