Body Electrical Control System; Precautions In Diagnosing Trouble; General Description; Bcm General Description - Suzuki 2006 SX4 Service Manual

10B-1 Body Electrical Control System:

Body Electrical Control System

Control Systems

Precautions in Diagnosing Trouble

• Diagnostic information stored in BCM memory can be cleared as well as checked by using SUZUKI scan tool.
Before using scan tool, read its Operator's (Instruction) Manual carefully to have good understanding as to what
functions are available and how to use it.
• Be sure to read "Precautions for Electrical Circuit Service in Section 00" before inspection and observe what is
written there.
• Communication of ECM, TCM (A/T model), ABS control module, 4WD control module (if equipped), keyless start
control module (if equipped), combination meter and BCM is established by CAN (Controller Area Network). For
detail of CAN communication for BCM, refer to "CAN Communication System Description". Therefore, handle CAN
communication line with care referring to "Precaution for CAN Communication System in Section 00".

BCM General Description

The Body electrical Control Module (BCM) is
incorporated in junction block. Do not attempt removal of
BCM from junction block as it may cause contact failure.
The BCM incorporates relays and controllers which are
used for the following systems and controls them.
• Power door lock (if equipped)
• Keyless entry (if equipped)
• Door lock function of keyless start system (if
equipped)
• Rear wiper
• Combination meter
• Interior light

CAN Communication System Description

Refer to "CAN Communication System Description in Section 1A" for CAN communication system description.
BCM communication control data with each control module as follows.
BCM Transmission Data
Transmit
BCM
Precautions

General Description

S6RW0DA201001
A/C switch ON signal
Electric load signal
Brake fluid level switch signal
Parking brake switch signal
Diagnostic trouble code (DTC)
DATA Illumination ON signal
Seat belt buckle switch signal
Charging system signal
Engine oil pressure switch signal
Door switch status
Door lock status
• Warning buzzer
• Rear end door window defogger and door mirror
heater (if equipped)
• Rear end door opener (if equipped)
• Theft deterrent light
Also, the BCM has a function to cause the interior light
and open door warning light in the combination meter to
turn off when any door is left open for longer than 15
minutes to reduce wasteful battery consumption.
In addition, it is possible to check operation of actuator
which is controlled by BCM by using the output test
function of SUZUKI scan tool to operate actuator
simulatively.
Combination
ECM
Meter
S6RW0DA200001
S6RW0DA201002
Keyless Start
Control Module
(if equipped)
I6RW0CA20001-01