GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 Century 🢒 DTC 🢒 DTC B1339

Circuit Description

The battery feed circuit, from the INADV POWER BUS/RAP fuse to the body control module (BCM), provides power for the interior lamps.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B1339 Device Power 3 (high current 1) Circuit Open

Conditions for Running the DTC

The voltage on the interior lamps feed circuit from the BCM must be between 9-16 volts.

Conditions for Setting the DTC

The BCM detects that the circuit from the INADV POWER BUS/RAP fuse to the BCM is less than 1 volt for longer than 300 milliseconds.

Action Taken When the DTC Sets

The BCM stores DTC B1339 in memory.

Conditions for Clearing the DTC
    • A current DTC B1339 will clear if the BCM no longer detects the fault.
    • A history DTC B1339 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

Step

Action

Yes

No

Schematic Reference: Body Control System Schematics

Connector End View Reference: Computer/Integrating Systems Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Battery Power 3 parameter in the Body Control Module (BCM) input data list.

Does the scan tool display Present?

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

Go to Step 3

3

Test the battery circuit that does not display Present in the previous step for an open, high resistance, or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 7

Go to Step 4

4

Test the interior lamps feed circuit that 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 7

Go to Step 5

5

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 7

Go to Step 6

6

Replace the BCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the repair?

Go to Step 7

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7
  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