Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC B2747: Performance Shift Switch Circuit (Short To Ground Or Open): Description
Performance shift switch allows driver to select performance shift mode of automatic transaxle. When performance shift switch is on, a ground signal is sent to Body Control Module (BCM) through circuit No. 1571 (Brown/White wire). BCM will then send a class 2 message to EBTCM.
DTC B1747 will set when BCM senses a short to ground in circuit No. 1571 (Brown/White wire) for longer than 5 minutes. If conditions for malfunction no longer exist, history DTC will clear after 100 consecutive ignition cycles. DTC B2603 will also clear when conditions no longer exist or scan tool is used to clear codes.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.