GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1998 🢒 Firebird 🢒 DTC 🢒 DTC 42 Last Message Received Invalid

Conditions for Setting the DTC

The signal received by the BCM from a remote control door lock transmitter that was not assigned to the BCM.

Action Taken When the DTC Sets

All of the remote control door lock transmitter functions do not operate.

Conditions for Clearing the DTC

DTC 42 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
    • The BCM does not recognize the transmitter being used

DTC 42 is automatically cleared after it is displayed. Any button on the remote control door lock transmitter must be pressed again to display DTC 42 again.

Diagnostic Aids

DTC 42 may be set due to the following:

    • The remote control door lock transmitter is defective.
    • A transmitter was used without programming it to the BCM.
    • Another transmitter was used in the immediate area.

Test Description

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

  1. This step tests the BCM to see if DTC 42 is displayed by the BCM.

  2. This step tests the remote control door lock transmitter.

Step

Action

Value(s)

Yes

No

1
  1. Enter the BCM diagnostic mode. Refer to Diagnostic Trouble Code (DTC) Displaying .
  2. Press any button on the remote control door lock transmitter.

Does the BCM display DTC 42?

--

Go to Step 2

System OK

2
  1. Reprogram the remote control door lock transmitter to the BCM. Refer to Transmitter Programming/Synchronization .
  2. Enter the BCM diagnostic mode. Refer to Diagnostic Trouble Code (DTC) Displaying .
  3. Press any button on the remote control door lock transmitter.

Does the BCM display DTC 42?

--

Go to Step 3

System OK

3
  1. Program a known good remote control door lock transmitter to the BCM. Refer to Transmitter Programming/Synchronization .
  2. Enter the BCM diagnostic mode. Refer to Diagnostic Trouble Code (DTC) Displaying .
  3. Press any button on the remote control door lock transmitter.

Does the BCM display DTC 42?

--

Go to Step 4

Go to Step 5

4

Replace the BCM. Refer to Body Control Module Replacement .

Is the repair complete?

--

System OK

--

5
  1. Check the battery of the original transmitter.
  2. If the battery is OK, replace the transmitter.

Is the repair complete?

--

System OK

--