B2747

DTC B2747 Performance Shift Switch CKT Short/GND:

CIRCUIT DESCRIPTION
The BCM receives a ground signal from the Electronic Traction Control Switch through circuit 1571. The BCM receives the ground signal when the ignition is RUN and the driver toggles the enable/disable mode of the traction control system from an inactive to an active state. At this point the BCM sends out a class 2 message to the EBTCM. The BCM will not sent this message again until the traction control switch input has returned to an inactive state and transitions back to an active state.

CONDITIONS FOR SETTING THE DTC
The BCM detects a short to ground in circuit 1571 for over 5 minutes.

ACTION TAKEN WHEN THE DTC SETS
The BCM stores DTC B2747 in memory.

CONDITIONS FOR CLEARING THE DTC
^ The BCM detects a short to ground in circuit 1571.
^ A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
^ Using a scan tool.

DIAGNOSTIC AIDS
^ The following conditions may cause an intermittent malfunction to occur:
- An intermittent short to ground in circuit 1571.
- The BCM is shorted to ground internally.
^ If the DTC is a history DTC, the problem may be intermittent. Try performing the tests shown while moving wiring and connectors, this can often cause the malfunction to reappear.
^ DTC P1626 will set in the Powertrain Control Module (PCM) when the ignition switch is on with the Body Control module (BCM) disconnected. When BCM diagnostics and repairs are completed, refer to Computers and Control Systems for additional information on PCM related DTCs. Computers and Control Systems

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
2. This step checks for ground in circuit 1571.
3. The step determines whether the short to ground is in circuit 1571 or the Electronic Traction Control Switch.
4. This step determines whether the malfunction is intermittent or the BCM is faulty.