For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
Important: A short to ground will cause an open fuse(s). Before Performing this diagnostic procedure, inspect the fuse(s) for an open.
1 | Was the Remote Keyless Entry Diagnostic System test performed? | -- | Go to Step 2 | Go to Remote Keyless Entry System Check .
2 |

1. Inspect the door lock fuse J in the LH instrument panel wiring harness junction block. Verify that the following conditions exist:

• | The fuse is not open.

• | The fuse has voltage at both of the test points in all of the ignition switch positions.

2. Connect a scan tool.
3. Turn the ignition switch to the ON position.
4. Select DIAGNOSTICS on the scan tool.
5. Select DIAGNOSTIC CIRCUIT CHECK.
6. Select CLASS 2 MESSAGE MONITOR.

Are the BCM and RFA listed as ACTIVE?

--

Go to Step 3

Go to Scan Tool Cannot Communicate with RFA

3 |

1. Close the doors.
2. Attempt to lock and unlock the doors.

Do the doors lock and unlock?

--

Go to Step 7

Go to Step 6

4 |

1. Resynchronize the keyless entry transmitters. Refer to Transmitter Synchronization .
2. Attempt to lock and unlock the doors using the transmitter.

Do the doors lock and unlock?

Go to Remote Keyless Entry System Check

Go to Step 9

5 |

1. Using a scan tool, select RFA DATA - KEY FOB INFORMATION.
2. Press the LOCK and UNLOCK buttons on the keyless entry transmitters.

Does the status change?

--

Go to Step 9

Go to Step 11

6 |

1. Select BCM SPECIAL FUNCTIONS on the scan tool.
2. Command the door locks to lock and unlock.

Do the door locks operate?

--

Go to Step 7

Go to Step 10

7 |

1. Select RFA SPECIAL FUNCTIONS on the scan tool.
2. Select PROGRAM KEY FOBS.

Was the reprogramming successful?

--

Go to Step 8

Go to Step 12

8 | Resynchronize the system with a known good transmitter. Was resynchronization successful? | -- | Go to Remote Keyless Entry System Check | --
9 |

1. Replace the transmitter battery. Refer to Transmitter Battery Replacement .
2. Resynchronize the transmitter.

Do the doors lock and unlock?

--

Go to Remote Keyless Entry System Check

Go to Step 5

10 |

1. Replace the BCM.
2. Reprogram the BCM with the current calibrations.

Is the reprogramming complete?

--

Go to Step 5

--

11 | Replace the transmitter key fob. Is the repair complete? | -- | Go to Step 4 | --
12 | Replace the RFA module. Refer to Receiver Replacement . Is the repair complete? | -- | Go to Step 7 | --