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.
Circuit/System Testing
DTC U3000 with failure type byte 00, 41, 42, or 49
- Verify that the DTC is not set with FTB 00, 41, 42, or 49.
- If the DTC is set
Replace the B218 Side Obstacle Detection Control Module that is setting the DTC.
- Go to next step: If the DTC is not set
- If the DTC is set
- All OK.
DTC U3000 4B
- Verify that the ambient temperature around the module is less than 85°C (185°F).
- If the ambient temperature is above 85°C (185°F)
- Allow the area around the control module to cool below 85°C (185°F).
- Clear the DTC. Operate the vehicle under the conditions for running the DTC.
- Verify the DTC does not reset.
- If the DTC resets, replace the B218 Side Obstacle Detection Control Module.
- Go to next step: If the DTC does not reset
Go to next step: All OK.
- Go to next step: If the ambient temperature is below 85°C (185°F)
- Clear the DTC. Operate the vehicle under the conditions for running the DTC.
- Verify the DTC does not reset.
- If the DTC resets, replace the B218 Side Obstacle Detection Control Module.
- Go to next step: If the DTC does not reset
- All OK.
DTC U3000 51, DTC U3000 54, DTC U3000 56 or U3000 57
- Ignition ON.
- Verify that DTC U3000 51, U3000 54, DTC U3000 56 or U3000 57 is not set.
- If the DTC is set
- Program the B218 Side Obstacle Detection Control Module.
- Verify the DTC does not reset.
- If the DTC resets, replace the B218 Side Obstacle Detection Control Module.
- Go to next step: If the DTC does not reset
- All OK.
- Go to next step: If the DTC is not set
- All OK.
DTC U300 78 or U3000 97
- Ignition ON.
- Verify DTC U3000 78 or U3000 97 is not set.
- If the DTC is set
- Verify that the radar module is properly and securely mounted in position.
- Verify there is no object or debris blocking the radar sensor such as dirt, mud, snow, or salt. Clean as necessary.
- Inspect the module harness for signs of physical damage or corrosion. Repair or replace as necessary.
- Perform the B218 Side Obstacle Detection Control Module Correction Angle Reset.
- Operate the vehicle under the conditions for running the DTC.
- Verify the DTC does not reset.
- If the DTC resets, replace the B218 Side Obstacle Detection Control Module.
- Go to next step: If the DTC does not reset
- All OK.
- Go to next step: If the DTC is not set
- All OK.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.