BLIND SPOT MONITORING (BSM) CONTROL MODULE INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 8-PIN TYPE]

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1. Remove the trunk box. (See TRUNK BOX REMOVAL/INSTALLATION.)

2. Remove the seat side box. (BSM control module (LH) only) (See SEAT SIDE BOX REMOVAL/INSTALLATION.)

3. Remove the trunk end trim. (BSM control module (LH) only) (Vehicles with Bose®) (See TRUNK END TRIM REMOVAL/INSTALLATION.)

4. Remove the bass-box. (BSM control module (LH) only) (Vehicles with Bose®) (See BASS-BOX REMOVAL/INSTALLATION.)

5. Remove the BSM control module with the connector connected.

6. Measure the BSM control module terminal voltage using the short wiring harness connector in the position shown in the figure.

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  Note
  • The BSM control module connector cannot be connected to a tester due to its water-resistance processing, therefore the short wiring harness connector is used for measuring the terminal voltage.

  • If the terminal voltage is not as indicated in the table, inspect the short wiring harness connector for continuity. (See Continuity Inspection Of Short Wiring Harness Connector.) If the short wiring harness connector is normal, inspect the parts under "Inspection items”.
    ― If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the BSM control module.

Terminal Voltage Table (Reference)

BSM control module (LH)

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BSM CM (LH) short wiring harness connector terminal* | BSM CM (LH) connector side | Signal | Connected to | Measurement condition | Voltage (V) | Inspection item (s)
--- | --- | --- | --- | --- | --- | ---
A | A, E | BSM GND | Body ground | Under any condition | 1.0 or less | • Related wiring harnesses
B | D | BSM indicator light signal | BSM indicator light | Ignition switch is in ON position and BSM indicator light is illuminated | B+ | • BSM indicator light • Related wiring harnesses
BSM indicator light is not illuminated | 1.0 or less
C | — | — | — | — | — | —
D | — | — | — | — | — | —
E | — | — | — | — | — | —
F | G | CAN_L | — | Terminal used for communication therefore determination based on terminal voltage is not possible.
G | B | Power supply | Fuse | Ignition switch at ON | B+ | • Fuse • Related wiring harnesses
Ignition switch off | 1.0 or less
H | H | CAN_H | — | Terminal used for communication therefore determination based on terminal voltage is not possible.

* :Terminal voltage measurement connector terminal

Terminal Voltage Table (Reference)

BSM control module (RH)

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BSM CM (RH) short wiring harness connector terminal* | BSM CM (RH) connector side | Signal | Connected to | Measurement condition | Voltage (V) | Inspection item (s)
--- | --- | --- | --- | --- | --- | ---
A | A | BSM GND | Body ground | Under any condition | 1.0 or less | • Related wiring harnesses
B | D | BSM indicator light signal | BSM indicator light | Ignition switch is in ON position and BSM indicator light is illuminated | B+ | • BSM indicator light • Related wiring harnesses
BSM indicator light is not illuminated | 1.0 or less
C | — | — | — | — | — | —
D | E | BSM OFF switch signal | BSM OFF switch | Ignition switch at ON | BSM OFF switch is pressed | 1.0 or less | • BSM OFF switch • Related wiring harnesses
BSM OFF switch is not pressed | B+
E | — | — | — | — | — | —
F | G | CAN_L | — | Terminal used for communication therefore determination based on terminal voltage is not possible.
G | B | Power supply | Fuse | Ignition switch at ON | B+ | • Fuse • Related wiring harnesses
Ignition switch off | 1.0 or less
H | H | CAN_H | — | Terminal used for communication therefore determination based on terminal voltage is not possible.

* :Terminal voltage measurement connector terminal

Continuity Inspection Of Short Wiring Harness Connector

1. Verify that the continuity between the short wiring harness connector terminals is as indicated in the table.

  • If the continuity is not as indicated in the table, replace the short wiring harness connector.

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