GM Service Manual Online
For 1990-2009 cars only

Conditions for Setting the DTC

At least 50 consecutive signals were received by the BCM from a remote control door lock transmitter that was programmed to the BCM. All of the signals did not pass the encryption security test.

Action Taken When the DTC Sets

The BCM stops processing all transmitter signals for 20 seconds. All of the remote control door lock transmitter functions do not operate.

Conditions for Clearing the DTC

DTC 45 is set when all of the following conditions occur:

    • The BCM is in the diagnostic mode.
    • Any button on the remote control door lock transmitter is pressed.

DTC 45 is automatically cleared after it is displayed. Any button on the remote control door lock transmitter must be pressed again to display DTC 45.

Diagnostic Aids

If DTC 45 is set, the remote control door lock transmitter is out of synchronization with the BCM. This can be caused by any of the following conditions:

  1. The transmitter was in the synchronization or the program mode while out of the range of the BCM.
  2. The transmitter was defective.

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

Attempt to operate all of the remote functions using the keyless entry transmitter.

Do all of the transmitter functions operate properly?

--

Go to Step 3

Go to Keyless Entry System Inoperative

3

Important: Perform the set up procedure for the body control module (BCM).

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

--

System OK

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