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 internal tests on the EEPROM each time the RFA module performs a write function to a memory address in the EEPROM.

Conditions for Setting the DTC

The remote function actuator (RFA) module reads back the data that has been written and compares the data. If the data does not match after 3 consecutive write and verify attempts, the RFA module will indicate a write malfunction as current.

Action Taken When the DTC Sets

    • The remote function actuator (RFA) module stores a DTC B1007 in memory.
    • No driver warning message is displayed for this DTC.

Conditions for Clearing the DTC

The remote function actuator (RFA) module no longer detects an internal write malfunction.

Diagnostic Aids

The EEPROM cannot be removed from the remote function actuator (RFA) module.

Step

Action

Value(s)

Yes

No

1

Was the Remote Keyless Entry Diagnostic System Check performed?

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Go to Step  2

Go to Diagnostic System Check - Remote Keyless Entry

2

  1. Clear all DTCs.
  2. Turn the ignition switch off.
  3. Turn the ignition switch on.

Is DTC B1007 still present?

--

Go to Step  3

Go to Diagnostic System Check - Remote Keyless Entry

3

Replace the remote function actuator (RFA) module. Refer to Remote Control Door Lock Receiver Replacement .

Is the repair complete?

--

Go to Diagnostic System Check - Remote Keyless Entry

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