GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Regal 🢒 DTC 🢒 DTC B3102 Keyless Entry Data Link Circuit Low

Object Number: 606664 Size: SF

Circuit Description

The Body Control Module (BCM) is connected to the Remote Control Door Lock Receiver by the communication circuit. This circuit is the Serial data link for communication between the two modules.

Conditions for Setting the DTC
    • The BCM detects a short to ground in the communication circuit.
    • The condition above must be present for more than 0.3 seconds.

Action Taken When the DTC Sets

The BCM stores DTC B3102 in memory.

Conditions for Clearing the DTC
    • A current DTC B3102 will clear if the short to ground in the communication circuit is no longer detected by the BCM.
    • A history DTC B3102 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
    • A scan tool may be used to clear the DTC.

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. This step checks to see if the System Check was done.

    2.

  2. This step checks to see if the steady state circuit is at B+.

Step

Action

Value(s)

Yes

No

1

Did you perform the Remote Keyless Entry Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Remote Keyless Entry

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the status of DTC B3102.

Is the DTC B3102 a current code?

--

Go to Step 3

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

3

  1. Turn OFF the ignition.
  2. Disconnect the Remote Control Door Lock Receiver.
  3. Connect a DMM from the RFA Serial Data Link circuit to ground.
  4. Turn ON the ignition, with the engine OFF.
  5. Observe the voltage.

Does the DMM indicate the specified value?

B+

Go to Step 5

Go to Step 4

4

Test the RFA Serial Data Link 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 9

Go to Step 6

5

Inspect for poor connections at the harness connector of the Remote Control Door Lock Receiver. 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 7

6

Inspect for poor connections at the harness connector of the Body Control 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

7

Important: All transmitters which are to be recognized by the Remote Control Door Lock receiver must be programmed in a single programming sequence. If the system is placed in program mode it will erase all previously programmed transmitters upon the receipt of the programming signal from the first transmitter

Replace the Remote Control Door Lock Receiver. Refer to Remote Control Door Lock Receiver Replacement .

Did you complete the replacement?

--

Go to Step 9

--

8
  1. Replace the Body Control Module. Refer to Body Control Module Replacement .
  2. Perform the Body Control Module Set Up procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration .

Did you complete the replacement and set up procedure?

--

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