FOREWORD [BLIND SPOT MONITORING (BSM) SYSTEM]

2016 – MX-5 – i-ACTIVSENSE

WARNING:

The blind spot monitoring (BSM) system assists the driver in confirming the area behind the vehicle when changing lanes or backing up. Because of the various restrictions in the system operations, warning may not be performed or delayed even if there is a vehicle in an adjacent lane or at the vehicle rear. Do not rely completely on the system and always take responsibility as the driver in confirming the area behind the vehicle.

CAUTION:

The vehicle detection performance of the blind spot monitoring (BSM) system has limitations. Under the following conditions, the detection performance may be lowered and the system may not operate normally.

A part of the rear bumper near the blind spot monitoring (BSM) control module is deformed.
The blind spot monitoring (BSM) control module installation position is largely deviated.
Ice, snow or dirt is adhering to a part of the rear bumper near the blind spot monitoring (BSM) control module.
The vehicle is driven in rain, snow, or fog.
The temperature near the blind spot monitoring (BSM) control module is excessively high such as when climbing an uphill road for a long period on a hot day.
The battery voltage is low
The vehicle is driven on a steep road.
The turning radius is small such as when making a sharp turn or turning at an intersection.
The height of the driving lane and the adjacent lane are different.
Right after switching the system conditions from stop to operation by pressing the blind spot monitoring (BSM) switch.

When towing a trailer or if something is equipped to the rear part of the vehicle such as a bicycle carrier, the radar may be interrupted and the system may not operate normally. When towing a trailer or if something is equipped to the rear part of the vehicle such as a bicycle carrier, do not use the blind spot monitoring (BSM) system.
The warning may not be activated or delayed for the following vehicles/pedestrians:

Vehicles which are traveling at nearly the same speed as the detecting vehicle for long periods
Vehicles in an adjacent lane where the detecting vehicle is trying to pass
Vehicles in an excessively wide adjacent lane
Vehicles changing lanes from a distant lane to an adjacent lane
Vehicles with low body height such as sports cars, or vehicles with body shapes from which radar may not be reflected such as unloaded trailers
Small motorbikes or bicycles
Pedestrians with a body height of 100 cm or less

The blind spot monitoring system may trigger the warning accidentally for the following objects:

Vehicles in a distant lane if the lane width is excessively narrow
Objects on a road or road shoulder (such as guard rail, tunnel wall, street lights, and roadside trees)

If the malfunction does not recur, verify the malfunction cause by performing the following actions:

Verify that a DTC has been recorded in the memory. (See DTC INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].)
Based on the repair order form, attempt to drive the vehicle or perform tests to replicate the malfunction, record the data at that time, and detect the malfunction cause.
Refer to [Determining Open Circuit Location] based on the recorded DTC, shake the wiring harness or connector of the electrical component which is suspected to be the cause of the malfunction, and inspect for any changes in CAN system voltage or occurrence of any DTCs.
Inspect the female terminals on the connector of the electric component which is suspected to be the cause of the malfunction for poor connection.