Circuit Description
The body control module (BCM) controls the automatic transmission (A/T) shift lock control solenoid ground circuit and monitors the voltage of the ground control circuit.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B2712 Gearshift Lock Circuit Low
Conditions for Running the DTC
The control ground circuit of the A/T shift lock control solenoid must be OFF.
Conditions for Setting the DTC
| • | The BCM detects the controlled ground circuit voltage is approximately equal to ground in the OFF state. |
| • | The condition above must be present for more than 0.3 seconds. |
| • | This DTC will be set after 20 seconds due to possible false failures. |
Action Taken When the DTC Sets
The BCM stores DTC B2712 in memory.
Conditions for Clearing the DTC
| • | A current DTC B2712 will clear if the short to ground or open in the controlled ground circuit of the A/T shift lock control solenoid is no longer detected by the BCM. |
| • | A history DTC B2712 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present. |
| • | A scan tool may be used to clear the DTC. |
Diagnostic Aids
| • | If DTC B2712 is a history DTC, the fault may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
| • | The following conditions may cause an intermittent malfunction to occur: |
| - | An intermittent short to ground or open in the controlled ground circuit of the A/T shift lock control solenoid |
| - | The A/T shift lock control solenoid coil is intermittently shorted to ground internally. |
| - | The BCM is intermittently shorted to ground internally. |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Shift Lock Control Schematics Connector End View Reference: Shift Lock Control Connector End Views or Computer/Integrating Systems Connector End Views in Computer/Integrating Systems | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the automatic transmission (A/T) shift lock control system operate correctly? | Go to Diagnostic Aids | |
