Entertainment System Diagnosis

DTC B1982 Source/Battery Voltage Low:

CIRCUIT DESCRIPTION
Battery positive voltage (B+) is supplied via CKT 2240 (ORN) to the radio (IRC) at terminal F1. The radio monitors this voltage to determine if it is within a valid operating range.

CONDITIONS FOR SETTING DTC
The battery positive voltage (B+) falls below 10.5 volts for approximately 1.2 seconds or more.

ACTION TAKEN WHEN THE DTC SETS
^ The radio stores a DTC B1983 in its memory.
^ The radio does not respond to inputs when the voltage is less than 9 volts.
^ No driver warning message is displayed for this DTC.

CONDITIONS FOR CLEARING DTC
The battery positive voltage (B+) level rises above 9.5 volts for approximately 1.2 seconds.

DIAGNOSTIC AIDS
The IRC will not check for low battery positive voltage (B+) during and for 2 seconds following the engine CRANK mode.