MX5 mk4 Manual
Home bodyshop manual wiring diagram workshop manual service highlights transmission overhaul

Knowledge Base

Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5
Home

 

< Previous   Next >

BRIGHTNESS OF BLIND SPOT MONITORING (BSM) WARNING LIGHT IS TOO BRIGHT OR TOO DARK [BLIND SPOT MONITORING (BSM) SYSTEM]

NOTE:

  • If there is any vehicle malfunction complaint lodged by a customer, first perform malfunction diagnosis according to the troubleshooting procedure. (See FOREWORD [BLIND SPOT MONITORING (BSM) SYSTEM].)

Description

  • The brightness level of the blind spot monitoring (BSM) warningr light is low in the daytime (headlights off) (correct level at night).

  • The brightness level of the blind spot monitoring (BSM) warningr light is high at night (headlights on) (correct level in the daytime).

Possible malfunction

  • The blind spot monitoring control module (RH) cannot receive the TNS switch signal.

    • TNS switch (light switch) malfunction (stuck)

    • Instrument cluster malfunction

    • Blind spot monitoring (BSM) control module (LH) malfunction

Diagnostic Procedure

Step

Inspection

Action

1

    VERIFY MALFUNCTION (TNS SIGNAL CONDITION)
  • Display the instrument cluster PID I_ILLUMI_M item using the M-MDS.

    (See PID/DATA MONITOR INSPECTION [INSTRUMENT CLUSTER].)

  • Is the PID On (Night) indicated when the light switch is in the TNS position?

Yes

Go to Step 3.

No

Go to the next step.

2

    INSPECT LIGHT SWITCH
  • Inspect the light switch.

    (See LIGHT SWITCH INSPECTION.)

  • Is the light switch normal?

Yes

Perform the DTC inspection for the start stop unit, instrument cluster and the blind spot monitoring (BSM) control module.

(See DTC INSPECTION [START STOP UNIT].)

(See DTC INSPECTION [INSTRUMENT CLUSTER].)

(See DTC INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].)

No

Replace the light switch.

(See LIGHT SWITCH REMOVAL/INSTALLATION.)

3

    VERIFY MALFUNCTION (BRIGHTNESS CONDITION)
  • Display the following blind spot monitoring (BSM) system PIDs and simulation items using the M-MDS:

    (See PID/DATA MONITOR INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].)

    (See ACTIVE COMMAND MODES INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].)

    • PID
    • OP_BRT_R

    • OP_BRT_L

      Simulation item
    • WRN_IND_R

    • WRN_IND_L

NOTE:

  • If the blind spot monitoring (BSM) indicator light was turned on by the simulation function, the blind spot monitoring (BSM) indicator light luminosity becomes 92%.

  • Does the PID value indicate 92% when the simulation item is turned on?

Yes

NOTE:

  • If the blind spot monitoring (BSM) system is operating normally, the luminosity of the blind spot monitoring (BSM) indicator light will change according to the light switch condition.

    • Light switch in TNS position: 70%

    • Light switch in position except TNS: 92%

Explain to the customer that the system is normal.

No

Replace the blind spot monitoring (BSM) control module (LH).

(See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)

< Previous   Next >
 

Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

COPYRIGHT NOTICE:
This fan site is not affiliated with Mazda, and is intended for personal, or commercial use only. The content of our web pages is for general information purposes only and is presented “as is”. We give no assurance or warranty regarding the accuracy of the contents. Readers should do their due diligence and seek the advice of an appropriately certified automotive technician before attempting any steps on this site. Original content provided by Mazda North America. The content of the manual is copyright under DMCA to: full.metal.resistor@gmail.com
LIMITATION OF LIABILITY:
We accept no responsibility for errors, inaccuracies, or omissions found on these pages. Additionally, we hereby exclude liability for any demands, claims, damages or losses of any kind with regard to any content or information provided on our web-site, including but not limited to incidental or consequential damages, direct or indirect loss, compensatory damages, loss of profits, or otherwise. By using this manual you assume full liablity for any procedures carried out on your vehicle, and are responsible for the vehicle remaining road legal and safe.
Site design © MX5 Docs 2019
Privacy policy
Cookies
X
We use cookies to improve your experience on
our site. By using our site you consent to cookies.
Learn more
I Agree