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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5
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WRENCH INDICATOR LIGHT [SKYACTIV-G 2.0]

Purpose

  • The wrench indicator light notifies the driver that the maintenance period previously set by the driver approaches, or that the PCM has determined engine oil deterioration.

Function

  • When a maintenance period previously set by the driver approaches, or if the PCM determines engine oil deterioration, the PCM sends a wrench indicator light illumination request signal to the instrument cluster.

  • When the instrument cluster receives a wrench indicator light illumination request signal sent from the connectivity master unit (CMU) or the PCM via CAN communication, it turns the wrench indicator light on.

  • For the wrench indicator light illumination conditions, refer to [MAINTENANCE MONITOR] or [ENGINE OIL MAINTENANCE MONITOR]. (See MAINTENANCE MONITOR [WITH CENTER DISPLAY].) (See ENGINE OIL MAINTENANCE MONITOR [SKYACTIV-G 2.0].)

Construction

  • The wrench indicator light is built into the instrument cluster.

Operation

1. When the ignition is switched ON (engine off or on), the instrument cluster receives (1) an wrench indicator light illumination request signal from the PCM or the CMU via CAN communication.
2. The instrument cluster turns the transistor on (2) based on the wrench indicator light illumination request signal.
3. When the transistor turns on, a ground circuit with the wrench indicator light is established and the wrench indicator light turns on (3).

Fail-safe

  • Not applicable

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

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