GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Park Avenue 🢒 DTC 🢒 DTC B1982 Device Power Circuit High

Schematics

Refer to Control Module References in Body Controls for proper schematics.

Circuit Description

The module has an internal voltage sensor that checks the input voltage to determine if it is between 9.0-15.5 V.

Conditions for Setting the DTC

The 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.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. Tests for the proper operation of the complete circuit.

    2.

  2. Tests for the proper operation of the B+ input circuit.

Step

Action

Value(s)

Yes

No

1

Did you perform the Diagnostic System Check for starting and charging?

--

Go to Step 2

Go to Diagnostic System Check - Engine Electrical

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Battery Voltage data list.

Does the scan tool indicate the battery voltage is within the specified value?

9.5-15.5 Volts

Go to Step 7

Go to Step 3

3

  1. Turn OFF the ignition.
  2. Disconnect the module. Refer to Control Module References in Body Controls.
  3. Measure the voltage from the B+ input circuit of the module to the ground circuit of the module.

Does the voltage measure near the specified value?

B+

Go to Step 7

Go to Step 4

4

Measure the voltage from the B+ input circuit of the module to a good ground.

Does the voltage measure near the specified value?

B+

Go to Step 6

Go to Step 5

5

Test the B+ input circuit of the module for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 9

Go to Step 7

6

Test the ground circuit of the module for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 9

Go to Step 8

7

Inspect for poor connections at the harness connector of the module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 9

Go to Step 8

8

Important: Perform the setup procedure for the module if applicable.

Replace the module. Refer to Control Module References .

Did you complete the replacement?

--

Go to Step 9

--

9
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

--

Go to Step 2

System OK