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For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Century (China) 🢒 DTC 🢒 DTC B3102 Keyless Entry Data Link Circuit Low

Object Number: 385169 Size: SF
Keyless Entry Components
Keyless Entry Schematics

Circuit Description

The keyless entry system allows the driver to do the following functions from outside the vehicle by using a hand held radio transmitter:

    • Unlock the door locks. The courtesy lights activate automatically when using this function.
    • Lock the door locks.
    • Release the rear compartment lid.
    • Remote alarm.

The transmitter operates in the UHF band. The transmitter sends digitally coded signals to the Remote Control Door Lock Receiver (RCDLR) when pressing any of the transmitter buttons.

The RCDLR detects and decodes transmitter signals. For locking, unlocking, releasing, and remote alarm commands, the RCDLR sends command messages to the Body Control Module (BCM) to operate the door locks actuators, rear compartment lid actuator, courtesy lights, and remote alarm.

Conditions for Setting the DTC
  1. The BCM detects a short to ground in circuit 377.
  2. All conditions 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
    • The BCM no longer detects a short to ground in circuit 377.
    • A history DTC will clear after 100 consecutive ignition cycles if the condition for the fault is no longer present.
    • Using a scan tool.

Diagnostic Aids
    • The following conditions may cause an intermittent malfunction to occur:
      • An intermittent open or short to ground in circuit 377.
      • The BCM is shorted to ground internally.
      • The RCDLR is shorted to ground internally.
    • DTC P1626 will set in the Powertrain Control Module (PCM) when the ignition switch is on with the Body Control Module (BCM) disconnected. When BCM diagnostics and repairs are completed, refer to Powertrain On Board Diagnostic (OBD) System Check

Test Description

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

  1. This step checks for a short to ground in circuit 377.

    2.

  2. This step determines whether circuit 377 is shorted to ground or the RCDLR is faulty.

Step

Action

Value(s)

Yes

No

1

Was the BCM Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - Body Control System in Body Control System

2

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the Body Control Module (BCM) connector C1.
  3. Using a DMM, measure the voltage between the BCM harness connector C1 terminal C15 and ground.

Is the voltage measured within the specified range?

9-14 V

Go to Step 3

Go to Step 4

3
  1. Turn the ignition switch to the OFF position.
  2. Reinstall connectors/components removed.
  3. Turn the ignition switch to the ON position.
  4. Clear BCM DTCs.
  5. Check for BCM current DTCs.

Does DTC B3102 reset as a current DTC?

--

Go to Step 7

Go to Step 8

4

  1. Disconnect the Remote Control Door Lock Receiver (RCDLR).
  2. Using a DMM, measure the resistance between the RCDLR harness connector terminal E and ground.

Is the resistance measured same as the specified value?

∞

Go to Step 6

Go to Step 5

5

Repair short to ground in circuit 377.

Is the repair complete?

--

Go to Step 9

--

6

Replace the RCDLR. Refer to Remote Control Door Lock Receiver Replacement for service procedure.

Is the repair complete?

--

Go to Step 9

--

7
  1. Replace the BCM. Refer to Body Control Module Replacement in Body Control System for more information.
  2. After replacing the BCM, perform the Setup New BCM procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System for more information.

Is the repair complete?

--

Go to Step 9

--

8

The malfunction is not present at this time. Refer to Diagnostic Aids for additional information regarding this DTC.

Is the repair complete?

--

Go to Step 9

--

9
  1. Turn the ignition switch to the OFF position.
  2. Reinstall connectors/components removed.
  3. Turn the ignition switch to the ON position.
  4. Clear BCM DTCs.
  5. Check for BCM current DTCs.

Are there any BCM current DTCs set?

--

Go to Diagnostic System Check - Body Control System in Body Control System

System OK