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Mazda CX-5 Service & Repair Manual: Blind Spot Monitoring (Bsm) Control Module Inspection

Mazda CX-5 Service & Repair 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. Verify that the voltages of each of the terminals are as indicated in the terminal voltage table (reference).

Terminal Voltage Table (Reference)

BSM control module (RH)



Terminal

Signal name

Connected to

Measurement conditions

Voltage (V)

Inspection item(s)

A

Ground

Body ground

Under any condition

1.0 or less

  • Related wiring harness

B

Power position (IG1)

IG relay

Ignition switched ON (Engine off or on)

B+

  • C/U IG1 fuse

  • IG relay

  • Related wiring harness

Ignition switched off (LOCK) or ACC

1.0 or less

C

D

BSM indicator light (RH) signal

BSM indicator light (RH)

Turn off BSM indicator light using BSM system simulation WRN_IND_R

1.0 or less

  • BSM indicator light (RH)

  • Related wiring harness

Turn on BSM indicator light using rear vehicle monitoring system simulation WRN_IND_R

B+

E

F

G

MS-CAN_L

Related module

Because this terminal is for communication, determination using terminal voltage inspection is not possible.

H

MS-CAN_H

Related module

Because this terminal is for communication, determination using terminal voltage inspection is not possible.


BSM control module (LH)



Terminal

Signal name

Connected to

Measurement conditions

Voltage (V)

Inspection item(s)

A

Ground

Body ground

Under any condition

1.0 or less

  • Related wiring harness

B

Power position (1G1)

IG relay

Ignition switched ON (engine off or on)

B+

  • C/U IG1 fuse

  • IG relay

  • Related wiring harness

Ignition switched off (LOCK) or ACC

1.0 or less

C

D

BSM indicator light (LH) signal

BSM indicator light (LH)

Turn off BSM indicator light using BSM system simulation WRN_IND_L

1.0 or less

  • BSM indicator light (LH)

  • Related wiring harness

Turn on BSM indicator light using rear vehicle monitoring system simulation WRN_IND_L

B+

E

Ground

Body ground

Under any condition

1.0 or less

  • Related wiring harness

F

G

MS-CAN_L

Related module

Because this terminal is for communication, determination using terminal voltage inspection is not possible.

H

MS-CAN_H

Related module

Because this terminal is for communication, determination using terminal voltage inspection is not possible.


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Purpose Controls the blind spot monitoring (BSM) system. Function The BSM control module emits microwaves to detect an oncoming vehicle's position and speed information via ...

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