GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Park Avenue 🢒 DTC 🢒 DTC B1983 Device Power 1 Circuit Low

Object Number: 324017 Size: MF
Body Control Module Components
Body Control System Schematics

Circuit Description

The battery voltage is supplied to the SBM at connector C1 terminal C9.

The SBM determines if the voltage is within a valid operating range.

Conditions for Setting the DTC

The DTC B1983 sets when the battery voltage falls below 9.0 volts.

Action Taken When the DTC Sets
    • The SBM stores DTC B1983 as current.
    • No driver warning message is displayed.

Conditions for Clearing the DTC

DTC B1983 clears when the battery voltage is greater than 9.5 volts.

Diagnostic Aids

DTC B1983 disables the setting of most other SBM DTCs.

Step

Action

Value(s)

Yes

No

1

Did you preform the Body Control Module Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Body Control System

2
  1. Connect a scan tool to the data link connector (DLC).
  2. Turn the ignition switch to OFF.
  3. Select DATA from the SBM DATA LIST.

Is the voltage within the specified range?

9-15 V

Go to Step 5

Go to Step 3

3
  1. Disconnect the SBM connector C1.
  2. Measure the voltage between the SBM connector C1 terminal C9 and ground.

Is the voltage within the specified range?

9-15 V

Go to Step 5

Go to Step 4

4

Repair the charging system.

Is the repair complete?

--

Go to Diagnostic System Check - Body Control System

--

5
  1. Clear the DTC.
  2. Cycle the ignition.

Is the DTC still present?

--

Go to Step 6

Go to Diagnostic System Check - Body Control System

6
  1. Replace the SBM. Refer to Body Control Module Replacement
  2. Reprogram the SBM. Refer to Body Control Module (BCM) Programming/RPO Configuration

Is the repair complete?

--

Go to Diagnostic System Check - Body Control System

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