GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2001 🢒 Aztek - FWD 🢒 DTC 🢒 DTC B1482

Circuit Description

The BCM monitors the courtesy lamp supply voltage circuit which starts at the BCM and travels through the courtesy lamps, rear view mirror lamp, cargo lamp, reading lamps and back to the BCM for theater dimming. This circuit also travels through the glove box lamp, rear view mirror, reading lamps, vanity lamps and then on to ground.

Conditions for Running the DTC

This DTC shall run only if the Voltage to the BCM is between 9.0 and 16.0 volts and no communication codes are set.

Conditions for Setting the DTC

The voltage of the courtesy lamp supply voltage circuit at the module shall be less than 2 volts for 1/2 second while the output is active.

Action Taken When the DTC Sets

The BCM sets a DTC and disables the following State of Health (SOH) DTCs:

    • DTC U1096
    • DTC U1255
    • DTC U1300
    • DTC U1301

Conditions for Clearing the DTC
    • The voltage of the courtesy lamp supply voltage circuit at the module shall be greater than 2 volts for 1/2 second while the output is active.
    • A history DTC clears after 100 malfunction free ignition cycles.
    • The BCM receives the clear code command from the scan tool.

Step

Action

Yes

No

Schematic Reference: Body Control System Schematics in Body Control System

1

Did you perform the Engine Electrical Diagnostic System Check?

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, monitor the DTC Information for DTC B1482 in the BCM.

Does the scan tool indicate that DTC B1482 is current?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Test the courtesy lamp supply voltage circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 6

Go to Step 4

4

Inspect for poor connections at the harness connector of the BCM. 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 6

Go to Step 5

5

Important: Perform the set up procedure for the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 6

--

6
  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