Mazda 3 Service Manual: Blind Spot Monitoring (Bsm) Control Module Inspection
1. Disconnect the negative battery cable.
2. Remove the rear combination light..
3. Remove the rear bumper..
4. Connect the negative battery cable..
5. Measure the voltage at each terminal is as indicated in the Terminal Voltage Tables.
-
If the voltage or continuity is not as specified in the Terminal Voltage Table, inspect the parts under “Inspection item (s)”.
-
If the system does not operate normally even though the related wiring harness and short cord are normal, replace the BSM control module.
Terminal Voltage Table (Reference)
BSM control module (LH)
|
Terminal |
Signal |
Connected to |
Measurement condition |
Voltage (V) |
Inspection item (s) |
|
|
A |
Ground |
Body ground |
Under any condition |
1.0 or less |
|
|
|
B |
Power supply |
METER 15 A fuse |
Switch the ignition ON |
B+ |
|
|
|
Switch the ignition OFF (LOCK) |
1.0 or less |
|||||
|
D |
BSM indicator light (LH) signal |
BSM indicator light (LH) |
Switch the ignition to ON |
LED off |
1.0 or less |
|
|
LED on |
B+ |
|||||
|
E |
Ground |
Body ground |
Under any condition |
1.0 or less |
|
|
|
G |
CAN_L |
CAN system related module |
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible. |
|||
|
H |
CAN_H |
CAN system related module |
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible. |
|||
BSM control module (RH)
|
Terminal |
Signal |
Connected to |
Measurement condition |
Voltage (V) |
Inspection item (s) |
|
|
A |
Ground |
Body ground |
Under any condition |
1.0 or less |
|
|
|
B |
Power supply |
METER 15 A fuse |
Switch the ignition ON |
B+ |
|
|
|
Switch the ignition OFF (LOCK) |
1.0 or less |
|||||
|
D |
BSM indicator light (RH) signal |
BSM indicator light (RH) |
Switch the ignition to ON |
LED off |
1.0 or less |
|
|
LED on |
B+ |
|||||
|
E |
BSM OFF switch signal |
BSM OFF switch |
Switch the ignition to ON |
BSM switch pressed |
1.0 or less |
|
|
BSM switch not pressed |
B+ |
|||||
|
G |
CAN_L |
CAN system related module |
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible. |
|||
|
H |
CAN_H |
CAN system related module |
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible. |
|||
Blind Spot Monitoring (Bsm) Bracket Removal/Installation
1. Disconnect the negative battery cable..
2. Remove the rear combination light..
3. Remove the rear bumper..
4. Remove the BSM control module..
5. Remove the nuts.
6. Remove the clip.
...
Blind Spot Monitoring (Bsm) Control Module Removal/Installation
CAUTION:
If the BSM control modules are installed with the left and right modules
reversed, a DTC will be displayed and system will enter the fail-safe function.
Therefore, confirm that ...
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1. Remove the battery cover..
2. Disconnect the negative battery cable..
3. Disconnect the starter interlock switch connector.
4. Remove the starter interlock switch from the pedal bracket.
5. Insert a new starter interlock switch into the pedal bracket hole in the direction
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Rear View Monitor
The rear view monitor provides visual images of the rear of the vehicle when
reversing.
WARNING
Always drive carefully confi rming the safety of the rear and the
surrounding conditions
by looking directly with your eyes:
Reversing the vehicle by only looking at the screen is d ...
