DTC P0AB9 GMC

Description

The Multimedia module (MMM) checks its own system voltage by comparing the DC voltage with the system voltage in the Central electronic module (CEM). The diagnostic trouble code (DTC) is stored if the control module detects that: The system voltage is lower than 8.0 V. The control modules test for the diagnostic trouble code (DTC) starts in the event of: Ignition switch position II. Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.