Collision Mitigation Brake System (Cmbs): Overview Acura RL II facelift

Scheme 1

Scheme 2

System Description

The collision mitigation brake system (CMBS), anticipates collisions and assists brake operation to reduce the impact on occupants and vehicle damage. The system works in combination with the e-pretensioners, which retract the seat belts in anticipation of impact.

CMBS Operation

1. Warnings are both audible (warning buzzer) and visual (MID)
2. Evasive action support and collision-speed reduction by brake control

Scheme 3

DTC 64: CMBS Operation Error (Excessive Operation)

Note. If the CMBS operates frequently, DTC 64 is stored.

1. Remove the upper grille (see «UPPER GRILLE REPLACEMENT»(ref-348530-S35500373142009112400000) ).
2. Inspect the frame for warpage, and check the installation of the millimeter wave radar and the main bracket. Is the installation and the frame OK? YES - Go to step 3 . NO - Reinstall the components correctly, or replace if damaged, then go to step 3 .
3. Turn the ignition switch to ON (II).
4. Aim the millimeter wave radar (see «MILLIMETER WAVE RADAR AIMING»(ref-348552-S17861019452009112400000) ).
5. Clear the DTCs with the HDS.
6. Turn the adaptive cruise control (ACC) switch ON.
7. Watch the ACC and CMBS indicators. Do both indicators come on? YES - Go to step 8 . NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections.
8. Clear the DTCs with the HDS.
9. Watch the CMBS indicator. Does the CMBS indicator come on? YES - Go to step 10 . NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections.
10. Check for DTCs with the HDS. Is DTC 64 indicated? YES - Check for loose or poor connections. If OK, replace the ACC unit (see «ADAPTIVE CRUISE CONTROL (ACC) UNIT REMOVAL/INSTALLATION»(ref-348552-S13439405742009112400000) ). NO - Troubleshoot the indicated DTC.

See also:
• INSTRUMENT FASCIA REMOVAL/INSTALLATION