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NO.1 TPMS WARNING LIGHT ILLUMINATES [TIRE PRESSURE MONITORING SYSTEM (TPMS)]

CAUTION:

  • The Tire Pressure Monitoring System (TPMS) warning light illuminates according to the decrease in a tire air pressure (TPMS is normal).

  • The No.1 TPMS WARNING LIGHT ILLUMINATES the diagnostic procedure if the TPMS warning light illuminated due to a decrease in a tire pressure although the TPMS is normal.

Possible malfunction

  • The air pressure of a tire has decreased. (TPMS is normal)

Diagnostic Procedure

Step

Inspection

Results

Action

1
    TIRE PRESSURE INSPECTION

  • Inspect tire pressures while the tires are cold.

    (See WHEEL AND TIRE SPECIFICATION.)

  • Are the tire pressures at the specification?

Yes

Go to the next step.

No

Adjust the tire pressures to the specification while the tires are cold.

2
    TIRE PRESSURE MONITORING SYSTEM INITIALIZATION

  • Perform tire pressure monitoring system initialization.

  • Connect the M-MDS to DLC-2.

  • After the vehicle is identified, select the following items from the initial screen of the M-MDS.

    • Select "Chassis"

    • Select "ABS/DSC"

    • Select "TPMS Reset"

  • Was the tire pressure monitoring system initialization performed?

Yes

Go to the next step.

No

Perform the tire pressure monitoring system initialization.

3
    TPMS WARNING LIGHT VERIFICATION

  • Drive the vehicle for several minutes after the TPMS warning light turns off.

  • Does the TPMS warning light illuminate?

Yes

Inspect the tires and wheels for air leakage.

No

The tire pressure monitoring system is normal.
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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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