Mazda 3 manuals

Mazda 3 Service Manual: Blind Spot Monitoring (Bsm) Control Module Inspection

Mazda 3 Service Manual / Accessories / Safety Systems / 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.

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

  • Related wiring harness

B

Power supply

METER 15 A fuse

Switch the ignition ON

B+

  • METER 15 A fuse

  • Related wiring harness

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

  • Related wiring harness

  • BSM indicator light

LED on

B+

E

Ground

Body ground

Under any condition

1.0 or less

  • Related wiring harness

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

  • Related wiring harness

B

Power supply

METER 15 A fuse

Switch the ignition ON

B+

  • METER 15 A fuse

  • Related wiring harness

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

  • Related wiring harness

  • BSM indicator light

LED on

B+

E

BSM OFF switch signal

BSM OFF switch

Switch the ignition to ON

BSM switch pressed

1.0 or less

  • Related wiring harness

  • BSM OFF switch

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 ...

Other materials:

ABS HU/CM Inspection
1. Disconnect the ABS HU/CM connector.. 2. Connect the negative battery cable.. 3. Attach the tester lead to the ABS HU/CM wiring harness-side connector and inspect the voltage, continuity, or resistance according to the standard (reference value) in the table below. Standard (reference) ...

Door Lock Switch Inspection
1. Disconnect the negative battery cable.. 2. Remove the inner garnish.. 3. Remove the front door trim.. 4. Remove the front inner handle.. 5. Inspect for continuity between the door lock switch terminals using an ohmmeter. If not as indicated in the table, replace the door lock ...

Passenger Compartment Temperature Sensor Inspection [Full Auto Air Conditioner]
1. Measure the temperature around the passenger compartment temperature sensor and measure the resistance between passenger compartment temperature sensor terminals B and D. If the characteristics of the passenger compartment temperature sensor are not as shown in the graph, repla ...

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