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BLIND SPOT MONITORING (BSM) CONTROL MODULE INSPECTION

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2016 – MX-5 – i-ACTIVSENSE

BLIND SPOT MONITORING (BSM) CONTROL MODULE INSPECTION

1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

2. Remove the following parts:

a. Trunk end trim (See TRUNK END TRIM REMOVAL/INSTALLATION.)

b. Trunk side trim (See TRUNK SIDE TRIM REMOVAL/INSTALLATION.)

c. Rear combination light (See REAR COMBINATION LIGHT REMOVAL/INSTALLATION.)

d. Rear splash shield (See REAR SPLASH SHIELD REMOVAL/INSTALLATION.)

e. Rear bumper stay (See REAR BUMPER STAY REMOVAL/INSTALLATION.)

f. Rear bumper retainer no.1 (See REAR BUMPER RETAINER No.1 REMOVAL/INSTALLATION.)

g. Rear bumper (See REAR BUMPER REMOVAL.)(See REAR BUMPER INSTALLATION.)

3. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

4. Verify that the voltages of each of the terminals are as indicated in the terminal voltage table (reference).

  • If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s) and related wiring harnesses.

    • If the system does not operate normally even though the inspection items are normal, replace the blind spot monitoring (BSM) control module. (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)

      CAUTION:

      • When replacing a blind spot monitoring (BSM) control module (RH) having any of the following part numbers, it is necessary to replace the blind spot monitoring (BSM) control module (LH) at the same time to perform the configuration normally.

        • N243-67Y80 A

        • N243-67Y80 B

        • N243-67Y80 C

Terminal Voltage Table (Reference)

Blind spot monitoring (BSM) control module (LH)

Terminal

Signal name

Connected to

Measurement conditions

Voltage (V)

Inspection item(s)

A

B

C

D

MS-CAN_H

Data link connector-2

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

E

MS-CAN_L

Data link connector-2

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

F

G

Local CAN_H

Blind spot monitoring (BSM) control module (RH)

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

H

Ground

Body ground

Under any condition

1.0 or less

Related wiring harness

I

Power position (IG1)

IG1 relay

Ignition switched ON (engine off or on)

VB

  • C/U IG1 15A fuse

  • IG1 relay

  • Related wiring harness

Ignition switched off or ACC

1.0 or less

J

Local CAN_L

Blind spot monitoring (BSM) control module (RH)

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

Blind spot monitoring (BSM) control module (RH)

Terminal

Signal name

Connected to

Measurement conditions

Voltage (V)

Inspection item(s)

A

B

C

D

Blind spot monitoring (BSM) warning light signal (RH)

Blind spot monitoring (BSM) warning light (RH)

Using the simulation function WRN_IND_R for the blind spot monitoring system, turn off the blind spot monitoring (BSM) warning light.

1.0 or less

  • Blind spot monitoring (BSM) warning light (RH)

  • Related wiring harness

Using the simulation function WRN_IND_R for the blind spot monitoring system, turn on the blind spot monitoring (BSM) warning light.

Wave pattern (See Pattern 1.)

E

Blind spot monitoring (BSM) warning light signal (LH)

Blind spot monitoring (BSM) warning light (LH)

Using the simulation function WRN_IND_L for the blind spot monitoring system, turn off the blind spot monitoring (BSM) warning light.

1.0 or less

  • Blind spot monitoring (BSM) warning light (LH)

  • Related wiring harness

Using the simulation function WRN_IND_L for the blind spot monitoring system, turn on the blind spot monitoring (BSM) warning light.

Wave pattern (See Pattern 1.)

F

G

Local CAN_H

Blind spot monitoring (BSM) control module (LH)

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

H

Ground

Body ground

Under any condition

1.0 or less

Related wiring harness

I

Power position (IG1)

IG relay

Ignition switched ON (engine off or on)

B+

  • C/U IG1 15A fuse

  • IG1 relay

  • Related wiring harness

Ignition switched off or ACC

1.0 or less

J

Local CAN_L

Blind spot monitoring (BSM) control module (LH)

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

Inspection Using an Oscilloscope (Reference)

Pattern 1

  • Terminal:

    • Blind spot monitoring (BSM) warning light signal (RH): D (+) ↔ body ground (-)

    • Blind spot monitoring (BSM) warning light signal (LH): E (+) ↔ body ground (-)

  • Oscilloscope setting: 5 V/DIV (Y), 2 ms/DIV (X), DC range

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