For 1990-2009 cars

### Conditions for Setting the DTC

At least 50 consecutive signals were received by the BCM from a remote control door lock transmitter that is 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 again.

### 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:

• | The transmitter was in the synchronization or program mode while out of the range of the BCM.

• | The transmitter is defective.

### Test Description

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

1. This step tests the BCM to see if DTC 45 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 Displaying DTCs .
2. Press any button on the remote control door lock transmitter.

Does the BCM display DTC 45?

--

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 Displaying DTCs .
3. Press any button on the remote control door lock transmitter.

Does the BCM display DTC 45?

--

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 Displaying DTCs .
3. Press any button on the remote control door lock transmitter.

Does the BCM display DTC 45?

--

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

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