GM Service Manual Online
For 1990-2009 cars only

Object Number: 500894  Size: SF
Data Link Connector Schematics
Keyless Entry Components
Keyless Entry System Circuit Description

Circuit Description

The remote function actuator (RFA) module performs this test every time the module processes a message from a transmitter.

Conditions for Setting the DTC

The remote function actuator (RFA) module will set this DTC if the module receives a transmission from a transmitter that is not synchronized with the RFA module.

Action Taken When the DTC Sets

    • The remote function actuator (RFA) module stores a DTC B3108 in memory.
    • No driver warning message is displayed for this DTC.

Conditions for Clearing the DTC

The remote function actuator (RFA) module will clear this DTC when a transmission is received from a valid synchronized transmitter.

Diagnostic Aids

This DTC will stay in memory as current until the module receives a valid transmission from one of the remote function actuator (RFA) transmitters.

Step

Action

Value(s)

Yes

No

1

Did you perform the Remote Keyless Entry Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Remote Keyless Entry

2

  1. Synchronize the transmitter. Refer to Transmitter Synchronization .
  2. Clear the DTC from the remote function actuator (RFA) module.
  3. Cycle the transmitter buttons.

Did DTC  B3108 return?

--

Go to Step 3

Go to Diagnostic System Check - Remote Keyless Entry

3

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

Is the repair complete?

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Go to Diagnostic System Check - Remote Keyless Entry

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