Als Info:
The connectivity master unit (CMU) stores the maintenance monitor setting content, and the elapsed time and traveled distance from when the setting was made. The stored information is not cleared even if the battery cables are disconnected.
NOTE:
The maintenance monitor setting information recorded in the CMU cannot be written to a new CMU, therefore, the maintenance monitor is set to the initial setting value if the CMU is replaced. Before replacing the CMU, explain to the customer that the maintenance monitor is reset to the initial setting value.
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).
