Mazda CX-5 Service & Repair Manual: Rear Body Control Module (Rbcm)

Mazda CX-5 Service & Repair Manual / Electrical / Data Network / Rear Body Control Module (Rbcm)

Outline

Positioned at the rear of the vehicle, the rear body control module (RBCM) performs numerous system controls for functions at the vehicle rear.

Function

The rear body control module (RBCM) controls the system based on the input/output signals.
The functions which are controlled are as follows:

Control table


Control	Content	Reference
Room light control system control	The rear body control module (RBCM) changes the illumination condition and illumination level of the interior lights (door position) according to whether the doors are opened/closed and locked/unlocked.	(See ROOM LIGHT CONTROL SYSTEM.)
Back-up light control	The back-up light illuminates in conjunction with the shift operation.	(See REAR COMBINATION LIGHT.)
Power door lock system control	A power door lock system has been adopted in which all doors and the liftgate are locked/unlocked when the driver's door is locked/unlocked using the driver's door lock knob, or the door key cylinder is operated.	(See POWER DOOR LOCK SYSTEM.)
Rear wiper system control	Equipped with continuous, auto-stop, intermittent wiper, and synchronized washer and wiper operation.	(See REAR WIPER SYSTEM.)
Liftgate opener system control	A liftgate opener system has been adopted in which the liftgate can be opened just by pressing the liftgate opener switch.	(See LIFTGATE OPENER SYSTEM.)
Theft-deterrent system	The theft-deterrent system operates the theft-deterrent horn and hazard warning lights if a door, liftgate or the hood is improperly opened.	(See THEFT-DETERRENT SYSTEM.)
CAN (Controller Area Network)	Sends and receives signals between CAN system-related modules using the CAN system.	(See CONTROLLER AREA NETWORK (CAN) SYSTEM.)
On-board diagnostic system	The rear body control module (RBCM) is equipped with an on-board diagnosis function which records DTCs in the event of a malfunction.	(See ON-BOARD DIAGNOSTIC SYSTEM [REAR BODY CONTROL MODULE (RBCM)].)

Structural view

System wiring diagram

Power window system, Auto dimming mirror

Power door lock system, theft-deterrent system

Room lights, Brake light system

Rear wiper system

Fuel-level sensor system

CAN system

Fail-safe

Room light control system

If an error is detected in a combination of the door lock-link switch signals, the rear body control module (RBCM) controls the interior light based on the signal before the error occurred.
If the CAN signal cannot be received normally, the rear body control module (RBCM) controls the interior light based on the signal last received. If the CAN signal cannot be received normally for 5 s or more, the rear body control module (RBCM) stops the interior light control.

Back-up light

Function not equipped.

Power door lock system

Function not equipped.

Rear wiper system

If the CAN signal cannot be received normally, the rear body control module (RBCM) controls the rear wiper based on the signal last received. If the CAN signal cannot be received normally for 5 s or more, the rear body control module (RBCM) stops the rear wiper control.

Liftgate opener system

If the CAN signal cannot be received normally, the liftgate open operation is inhibited.

Theft-deterrent system

Function not equipped.

PID/Data Monitor Inspection [Rear Body Control Module (Rbcm)]

1. Connect the M-MDS to the DLC-2. 2. After the vehicle is identified, select the following items from the initialization screen of the M-MDS. a. Select “DataLogger”. b. Select “Modules� ...

Rear Body Control Module (Rbcm) Configuration (Using As Built Data)

NOTE: If the configuration is performed using As-Built data, the set value of the personalization function is reset to the initial value (condition when shipped from factory). Verify the ...

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