Amplifier (AMP)

B21DD-84-SYSTEM VOLTAGE - SIGNAL BELOW ALLOWABLE RANGE

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Amplifier monitors CAN messages. The Amplifier sets a DTC if the module receives a CAN message indicating battery voltage is below a certain voltage.

For a detailed description of the Audio System. Audio And Video - Description.

For additional information regarding the operation of the Audio System. Audio And Video - Operation.

- When Monitored:
With the ignition on.

- Set Condition:
This Diagnostic Trouble Code (DTC) is set when the Amplifier receives a CAN message indicating the battery voltage is below 10 volts for greater than 15 seconds.





CHECK FOR POWERTRAIN CONTROL MODULE (PCM) DTCs

NOTE: Make sure the battery is fully charged before proceeding.

1. Using the scan tool, read the active PCM DTCs.

Are there any battery or charging system DTCs present?

Yes

- Testing and Inspection Perform the appropriate diagnostic procedure.

No

- This DTC is informational only. At some time there was a low battery system voltage. Check the battery and charging system.