B1982

CIRCUIT DESCRIPTION
The BCM, DDM and MSM have an internal voltage sensor that checks the input voltage to determine if it is between 9.0-15.5 V. The IPC and HCM receive a class 2 message from the BCM notifying these modules of high system voltage.

CONDITIONS FOR SETTING THE DTC
DTC B1982 sets when the battery voltage raises above 16.0 volts.

ACTION TAKEN WHEN THE DTC SETS
Stores a DTC B1982 in the BCM memory.

CONDITIONS FOR CLEARING THE DTC
In order to clear the DTC from a current status the voltage shall be less than 15.5 volts for 1.2 seconds.

DIAGNOSTIC AIDS

IMPORTANT: If DTC B1982 is set as current in the IPC or HCM use the table to diagnose the failure in the BCM.

DTC B1982 may set if the vehicle is connected to a battery charger on fast or boost charge.

TEST DESCRIPTION

Step 1:

Steps 2 - 6:

Steps 7 - 9:

The numbers below refer to the step numbers on the diagnostic table.
3. Tests for the proper operation of the complete circuit.
4. Tests for the proper operation of the battery positive voltage circuit.