Entertainment System Diagnosis

Diagnostic Trouble Code Chart:

Wiring Schematic:

CIRCUIT DESCRIPTION
The battery voltage is supplied to the radio (IRC) at terminal F1. The radio (IRC) uses this power feed in order to perform all of the radio's functions. The radio (IRC) measures the battery voltage at terminal F1 every 300 ms.

CONDITIONS FOR SETTING THE DTC
The battery voltage measured at terminal F1 is less than 9 V for 4 consecutive monitoring cycles.

ACTION TAKEN WHEN THE DTC SETS
When DTC B1983 is current, class 2 loss of serial data communication DTCs will not set.

CONDITIONS FOR CLEARING THE DTC
The battery voltage is more than 9 V in the next monitoring cycle.