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.
Collision Mitigation Braking System (CMBS) Symptom Troubleshooting - CMBS indicator does not go off
CMBS indicator does not go off
- DTCs check
-1. Turn the vehicle to the ON mode.
-2. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame DTC (IDAS)
Are any DTCs indicated?
YES
Go to the indicated DTC's troubleshooting .
NO
Go to step 2.
- VSA system DTC check
-1. Check for DTCs with the HDS.
DTC Description DTC Are any DTCs indicated?
YES
Go to the indicated DTC's troubleshooting .
NO
Go to step 3.
- PGM-FI system DTC check
-1. Check for DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Are any DTCs indicated?
YES
Go to the indicated DTC's troubleshooting .
NO
Go to step 4.
- Gauge control module operation check
-1. Do the gauge control module self-diagnostic function .
Is the gauge control module OK?
YES
Go to step 5.
NO
- CMBS OFF switch internal circuit check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Test the CMBS OFF switch .
Is the switch OK?
YES
Check for loose terminals and poor connections in the multipurpose camera unit 20P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the multipurpose camera unit .
NO
NO RELATED
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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.