GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Corvette 🢒 Body and Accessories 🢒 Keyless Entry 🢒 DTC B2805 No Transmitters Programmed

Object Number: 468921 Size: LF
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Circuit Description

When a receiver is replaced, program all transmitters to the new electronic door lock receiver. DTC B2805 will remain current until at least one transmitter is programmed. The electronic door lock receiver can stored up to 3 identification codes at a time.

Conditions for Setting the DTC

The electronic door lock receiver has indicated that no transmitter Vehicle Access Code (VAC) has been programmed.

Action Taken When the DTC Sets
    • Stores a DTC B2805 in the receiver memory
    • No driver warning message will be displayed for this DTC.

Conditions for Clearing the DTC

The electronic door lock receiver can only detect this condition as a current code. Therefore, when the receiver has indicated that a valid VAC was programmed properly, this DTC will automatically clear.

Diagnostic Aids

A DTC B2805 will remain stored in the receiver's memory until at least one transmitter is programmed.

Test Description

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

  1. This step checks if the receiver is currently programmed to a transmitter.

    2.

  2. This step substitutes a known good transmitter in order to check if the original transmitter is malfunctioning.

    3.

  3. This step checks the condition of the transmitter battery.

DTC B2805 -- No Transmitters Programmed

Step

Action

Value(s)

Yes

No

1

Were you sent here from the Remote Keyless Entry Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Remote Keyless Entry

2

Program the transmitters. Refer to Transmitter Programming/Synchronization .

Was the procedure successful?

--

Go to Step 3

Go to Step 4

3
  1. Clear the DTCs. Refer to Clearing DTCs .
  2. Using a scan tool, check for RFA DTCs.

Does DTC B2805 reset as current?

--

Go to Step 7

Go to Diagnostic System Check - Remote Keyless Entry

4

Program a transmitter that is known to be good. Refer to Transmitter Programming/Synchronization .

Was the programming procedure successful?

--

Go to Step 5

Go to Step 7

5

Inspect the malfunctioning transmitter battery for the following conditions:

    • Improper installation
    • Wrong battery
    • Weakness or rundown

Do any of these conditions exist?

--

Go to Step 6

Go to Step 8

6

Replace the transmitter battery. Refer to Transmitter Battery Replacement .

Is the repair complete?

--

Go to Step 2

--

7
  1. Replace the remote control door lock receiver. Refer to Receiver Replacement .
  2. Program all TPM sensors. Refer to Tire Pressure Monitoring Sensor Programming in Tire Pressure Monitor.
  3. Program all RFA transmitters. Refer to Transmitter Programming/Synchronization .

Is the replacement complete?

--

Go to Step 9

--

8
  1. Replace the malfunctioning transmitter.
  2. Program the transmitters. Refer to Transmitter Programming/Synchronization .

Is the replacement complete?

--

Go to Step 9

--

9
  1. Turn OFF the ignition switch.
  2. Install or connect any components or connectors that were removed or disconnected.
  3. Clear the DTCs. Refer to Clearing DTCs .

Are all repairs complete?

--

Go to Diagnostic System Check - Remote Keyless Entry

--