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 B0702, Rap Relay Circuit (Short To Ground Or Open): Notes
BCM completes Retained Accessory Power (RAP) relay circuit when ignition switch is turned to RUN or ACC position by grounding circuit No. 707 (Black wire). RAP relay is de-energized after a 10-minute period or when any vehicle door is opened. BCM monitors voltage level on control circuit No. 707. When BCM activates RAP relay, voltage level in control circuit should be low. When relay is not activated, voltage level in control circuit should be high.
DTC B0702 will set when BCM detects a short to ground or open in circuit No. 707 (Black wire) for more than 0.3 second when it is energizing RAP relay. No driver warning message will be displayed.
If conditions for malfunction no longer exist, history DTC will clear after 100 consecutive ignition cycles. DTC B0702 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.